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Proposed Experiment Could Clarify Origin of Martian Methane

Mon, 05/12/2025 - 13:08
Source: Journal of Geophysical Research: Planets

Over the past decade, the Curiosity rover has repeatedly detected methane on the surface of Mars. This gas is often produced by microbes, so it could herald the presence of life on the Red Planet. But skeptics have postulated that the gas detected by Curiosity could have a much more pedestrian origin. Viscardy et al. suggest the methane could be coming from inside the Curiosity rover itself rather than from the atmosphere of Mars. They propose an experiment that could differentiate between microbes and a technological source.

There’s ample reason to believe something is going awry, the researchers say. Each methane measurement that Curiosity’s spectrometer reports is actually the average of three individual measurements. Though those averages tend to suggest the presence of methane, the individual measurements are far more variable, bringing the results into question.

Another issue concerns the instability of gas pressures inside the spectrometer. The two main compartments—the foreoptics chamber that holds the laser source and the cell that holds the Martian air sample—are designed to remain sealed from each other and from the outside environment. However, significant pressure variations observed in both compartments, even during individual measurement runs, suggest this isn’t the case. These pressure changes raise doubts about the hermetic sealing of the system and the integrity of the analyzed air samples.

It’s clear, however, that at least some of the methane traveled to Mars from Earth. Prior to launch from Cape Canaveral in 2011, Florida air is known to have leaked into the foreoptics chamber. This contamination has persisted despite multiple gas evacuations, pointing to unidentified methane reservoirs or production mechanisms within the instrument. As a result, methane levels in this compartment are more than 1,000 times higher than those measured in the cell storing the Martian air sample for analysis. Even an “imperceptible” leak between the chambers could cause Curiosity to report erroneous methane levels, the researchers write.

To put the issue to rest, the researchers suggest analyzing the methane content of the same sample of Martian air on two consecutive nights. A concentration of methane that is higher on the second night than on the first night would suggest that methane is leaking into the sample from elsewhere in the rover rather than coming from the planet itself. (Journal of Geophysical Research: Planets, https://doi.org/10.1029/2024JE008441, 2025)

—Saima May Sidik (@saimamay.bsky.social), Science Writer

Citation: Sidik, S. M. (2025), Proposed experiment could clarify origin of Martian methane, Eos, 106, https://doi.org/10.1029/2025EO250182. Published on 12 May 2025. Text © 2025. AGU. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

Seismic analysis to understand the 13 February 2024 Çöpler Gold Mine Landslide, Erzincan, Türkiye 

Mon, 05/12/2025 - 06:44

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides.

On 13 February 2024, the enormous Çöpler Gold Mine Landslide occurred in Erzincan, Türkiye (Turkey), killing nine miners. This was the first of two massive and immensely damaging heap leach mine failures last year (the other occurred in Canada). That such an event could occur has come as something of surprise to many people, so there is intense interest in understanding the circumstances of the failure.

I posted about the landslide at the time, and subsequently:

At the time, Capella Space captured this amazing radar image of the aftermath of the landslide (which is highlighted):

A radar image of the 13 February 2024 landslide at Çöpler Mine in Türkiye (Turkey), courtesy of Capella Space.

Analysis of this landslide is ongoing, and information is emerging on a regular basis. The latest is an open access paper (Büyükakpınar et al. 2025the PDF is here) in The Seismic Record that combines analysis of the seismic data from the landslide with remote sensing data to try to understand the failure.

The use of seismic data for landslide analysis often causes confusion, with people interpreting it to mean that the landslide was triggered by an earthquake. This is not the case – the scale of this landslide meant that it generated a seismic signal that was detected up to 400 km from the source. This data can be analysed to provide information about the landslide itself.

Büyükakpınar et al. (2025) provides three really interesting insights into the Çöpler Gold Mine Landslide, confirming initial observations. The first is that there are two distinct seismic signals, 48 seconds apart. Thus, there were two landslide events. The first detached to the west, representing a collapse of a steep slope into the deep excavation. The second moved to the north‐northeast, on a more gentle slope. It is the second that was caught on video, and that is highlighted in the Capella Space image. In fact the first landslide can also be seen in the image – in particular the landslide deposit at the bottom of the deep excavation. The analysis also suggests that the combined landslide volume was about 1.2 millon m3, of which the second landslide was about 1 millon m3.

I would note that soon after the landslide,  Tolga Gorum correctly identified that the image shows that the landslide moved in two directions.

Second, Büyükakpınar et al. (2025) have used an InSAR analysis to examine precursory deformation of the heap leach pad before the failure. This suggests that the mass was moving at up to 60 mm per year over the four years prior to the failure. The trend is quite linear, so it is not obvious that it would have provided an indication that failure was imminent, but this level of movement would be quite surprising in a well managed site.

Finally, and perhaps most importantly, Büyükakpınar et al. (2025) also show that the embankment below the cyanide leach pond (labelled in the pre-failure Google Earth imagery below) is now moving at up to 85 mm/year. As the authors put it this “raises significant concerns about the potential for further instability in the area”.

Google Earth image showing the site of the 13 February 2024 Çöpler Gold Mine Landslide, Erzincan, Türkiye (Turkey). The embankment that is showing active deformation is highlighted.

One can only hope that this hazard, in a seismically active area, is being addressed and that lessons have been learnt.

Reference

Büyükakpınar, P. et al. 2025. Seismic, Field, and Remote Sensing Analysis of the 13 February 2024 Çöpler Gold Mine Landslide, Erzincan, TürkiyeThe Seismic Record 5 (2): 165–174. doi: https://doi.org/10.1785/0320250007

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Trump Blocks Funding for EPA Science Division

Fri, 05/09/2025 - 19:56
body {background-color: #D2D1D5;} Research & Developments is a blog for brief updates that provide context for the flurry of news regarding law and policy changes that impact science and scientists today.

The Trump administration has blocked funding for the EPA’s Office of Research and Development (ORD), the agency’s main science division.

An email sent 7 May and first reported by E&E News said that research laboratory funding had been stopped except for requests related to health and safety. Nature then obtained additional internal e-mails regarding the funding freeze which were confirmed by anonymous EPA sources.

“Lab research will wind down over the next few weeks as we will no longer have the capability to acquire supplies and materials,” one of the emails said.

The freeze appears to disregard a Congressional spending agreement that guaranteed EPA funding at 2024 levels through September.

On 2 May, EPA administrator Lee Zeldin announced a “reorganization” within the EPA to ensure that its research “directly advances statutory obligations and mission-essential functions.” Zeldin assured members of the House Committee on Science, Space, and Technology that ORD would not experience significant changes during the reorganization, and this latest funding freeze seems to break that promise.

 
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“We are unsure if these laboratory activities will continue post-reorganization,” the 7 May email stated. “Time and funding would be needed to reconstitute activities.”

The EPA told E&E News that the email was “factually inaccurate” and that ORD is not part of the planned reorganization.

But Jennifer Orme-Zavaleta, who served as principal deputy assistant administrator at ORD during Trump’s first presidency, said that “They have basically shut ORD down by cutting off the money.”

The 2 May reorganization announcement also included a deadline for the nearly 1,500 ORD staff to either apply for a new position within the EPA, retire, or resign. That deadline is at 11:59 on 9 May. Fewer than 500 new jobs have been posted at the agency, and hundreds of EPA employees have already been fired.

—Kimberly M. S. Cartier (@astrokimcartier.bsky.social), Staff Writer

These updates are made possible through information from the scientific community. Do you have a story about how changes in law or policy are affecting scientists or research? Send us a tip at eos@agu.org. Text © 2025. AGU. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

NSF Plans to Abolish Divisions

Fri, 05/09/2025 - 13:12
body {background-color: #D2D1D5;} Research & Developments is a blog for brief updates that provide context for the flurry of news regarding law and policy changes that impact science and scientists today.

The U.S. National Science Foundation (NSF) plans to abolish dozens of divisions across all eight of its directorates and reduce the number of programs within those divisions, according to Science.

A spokesperson for NSF told Science that the reason behind the decision was to “reduce the number of SES [senior executive service] positions in the agency and create new non-executive positions to better align with the needs of the agency.”

Directorates at NSF and the divisions within them oversee grantmaking related to a particular field of science. Current directors and deputy directors will lose their titles and may be reassigned. Division directors play a large role in grantmaking decisions and are usually responsible for giving final approval for NSF awards. 

NSF lists the following directorates and divisions:

  • Directorate for Biological Sciences
    • Biological Infrastructure
    • Environmental Biology
    • Emerging Frontiers
    • Integrative Organismal Systems
    • Molecular and Cellular Biosciences
  • Directorate for Computer and Information Science and Engineering
    • Office of Advanced Cyberinfrastructure
    • Computing and Communication Foundations
    • Computer and Network Systems
    • Information and Intelligent Systems
  • Directorate for Engineering 
    • Chemical, Bioengineering, Environmental and Transport Systems
    • Civil, Mechanical and Manufacturing Innovation
    • Electrical, Communications and Cyber Systems
    • Engineering Education and Centers
    • Emerging Frontiers and Multidisciplinary Activities
  • Directorate for Geosciences
    • Atmospheric and Geospace Sciences
    • Earth Sciences
    • Ocean Sciences
    • Research, Innovation, Synergies and Education
    • Office of Polar Programs
  • Directorate for Mathematical and Physical Sciences
    • Astronomical Sciences
    • Chemistry
    • Materials Research
    • Mathematical Sciences
    • Physics
    • Office of Strategic Initiatives
  • Directorate for Social, Behavioral, and Economic Sciences
    • Behavioral and Cognitive Sciences
    • National Center for Science and Engineering Statistics
    • Social and Economic Sciences
    • Multidisciplinary Activities
  • Directorate for STEM Education
    • Equity for Excellence in STEM
    • Graduate Education
    • Research on Learning in Formal and Informal Settings
    • Undergraduate Education
  • Directorate for Technology, Innovation and Partnerships
    • Regional Innovation and Economic Growth
    • Accelerating Technology Translation and Development
    • Preparing the U.S. Workforce

“The end of NSF and American science expertise as we know it is here,” wrote Paul Bierman, a geomorphologist at the University of Vermont, on Bluesky

 
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The decision to abolish its divisions may be part of a larger restructuring of NSF grantmaking, according to Science.

NSF was already facing drastic changes to its operations from Trump administration directives, including an order to stop awarding new and existing grants until further notice and an order cancelling hundreds of grants related to diversity, equity, and inclusion as well as disinformation and misinformation. Last month, NSF shuttered most of its outside advisory committees that gave input to operations at seven of the eight directorates.

On 8 May, members of the House Committee on Science, Space, and Technology sent a letter to Brian Stone, the acting director of the NSF, expressing distress at the changes at NSF over the past few weeks. 

“So, who is in charge here? How far does DOGE’s influence reach?” members of the committee wrote in the letter. “We seek answers about actions NSF has taken that potentially break the law and certainly break the trust of the research community.”

Layoff notices are expected to be sent to NSF staff members today, as well.

9 May update: On Friday, NSF closed its Division of Equity for Excellence in STEM (EES) and removed the division from its website. EES was responsible for programs that advanced access to science, technology, engineering, and mathematics (STEM) education. In its explanation for the closure, NSF noted that it is “mindful of its statutory program obligations and plans to take steps to ensure those continue.” Division grantees received notice from their program officers about the closure this morning.

An internal memo circulated Thursday and obtained by E&E News stated that NSF will begin a reduction in force (RIF) aimed at its Senior Executive Service. The RIF will also terminate roughly 300 temporary positions.

—Grace van Deelen (@gvd.bsky.social), Staff Writer

These updates are made possible through information from the scientific community. Do you have a story about how changes in law or policy are affecting scientists or research? Send us a tip at eos@agu.org. Text © 2025. AGU. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

Senior Scientists Must Stand Up Against Attacks on Research and Education

Fri, 05/09/2025 - 13:09

Massive cuts in federal funding to schools and science agencies, dogmatic calls to eliminate entire research areas, revocations of visas for international students and scholars, and attacks on academic freedom, speech, and the value of education and expertise—all emanating from recent Trump administration actions—are damaging and reshaping U.S. higher education and scientific institutions. Furthermore, the country’s withdrawals from international treaties (e.g., the Paris Agreement) and organizations (e.g., the Intergovernmental Panel on Climate Change and World Health Organization), and its weakening of programs promoting health, environmental protection, cultural exchange, and peace, diminish U.S. leadership and credibility globally and add to instabilities threatening lives, economies, and security around the world.

The surprising speed and breadth of the attacks and changes have left scientists, educators, and others confused, afraid, and grappling with how to respond.

The surprising speed and breadth of the attacks and changes have left scientists, educators, and others confused, afraid, and grappling with how to respond. The environment of intimidation, uncertainty, isolation, and fear created by the administration has been compounded by the silence or outright capitulation of many leaders and institutions, despite their having firm legal and constitutional protections, in the face of these threats. If sitting Republican senators like Lisa Murkowski (R-Alaska), major universities, law firms, and private companies and foundations are afraid to speak out and defend their values, what can individuals do?

Individuals can organize, and in so doing wield strength in numbers and identify leaders who are well-positioned to raise their voices to push reluctant institutions to act. Within science higher education, senior scientists can and should fill these roles.

Standing Up and Standing Out

The risk calculations for many institutions and individuals in the face of the administration’s swift, illiberal, and authoritarian actions have been clear: It is better to comply than to fight, because fighting risks funding losses, investigations, and lawsuits.

However, as the experiences of some universities, notably Columbia, have demonstrated, submitting to administration demands does not spare institutions from further scrutiny. In Harvard’s case, shortly after the school’s president indicated willingness to engage with the administration about shared concerns, the scope of outrageous demands increased to infringe on its ability to make its own decisions on hiring, enrollment, curriculum, and values, leading the university to sue the administration.

Standing up and standing out are easier said than done, especially considering the very real risks to individuals’ careers, livelihoods, and safety.

Clearly, the balance of risk between compliance and standing up for core principles (not to mention the rule of law) has shifted. As the leaderships of higher education and science institutions weigh how to respond to this shift, their employees, members, and constituent communities can speak up to shape these responses.

What is needed is courage, solidarity, and an intentional and strategic plan of action. Of course, standing up and standing out are easier said than done, especially considering the very real risks to individuals’ careers, livelihoods, and safety. In science and academia, as elsewhere, these risks are greatest for those most vulnerable: students, early-career researchers, and immigrants and international scholars. Therefore, it is incumbent upon senior colleagues—who have outsize privilege, responsibility, and collective power in universities and professional societies—to lead the way.

Reframing the Message

With social media increasingly fueling the spread of misinformation and disinformation and the corporate consolidation and polarization (both real and perceived) of mass media, strategies used in the past to inform reasoned policy discussions no longer work on their own. Scientists’ rational, detailed, and evidence-based arguments used to be effective in influencing policy, but the current administration and its allies have largely disregarded experts and facts in making major decisions.

With this new reality, the messaging from scientists—especially senior scientists from privileged identities—must change. It must be direct and aimed at resisting ongoing actions that are dismantling U.S. scientific and education enterprises; harming students, universities and colleges, and federal research agencies; and degrading public health, foreign policy, the economy, and the rule of law. Simply put, these actions are leading to death and environmental destruction, and they are endangering the national economy.

The dismantling of federal support for HIV and AIDS research and prevention, for example, “will hurt people, will cause people to die, and will cause significant increased costs to all of us throughout the country,” said a former Centers for Disease Control and Prevention official. The numerous rollbacks of major EPA rules and environmental protections will dramatically degrade air and water quality and irreparably harm public health and ecosystems. And the cuts to scientific research will directly affect our ability to advance medical, energy, transportation, space, communication, and infrastructure innovations, undermining the country’s economic strength.

Influencing Institutional Leaders

Senior scientists should be at the vanguard of these fronts, using their influence to protect students and more vulnerable colleagues.

In addition to speaking simply and clearly about the realities of such threats, scientists must come together within their own and across institutions to form united fronts. Senior scientists should be at the vanguard of these fronts, using their influence to protect students and more vulnerable colleagues, U.S. citizens, and international scholars alike.

They should demand that their institutional leaders uphold core values of higher education and science, including inclusion, international cooperation, and ethical and evidence-based research. They should demand that these leaders strengthen mutually beneficial ties among universities and professional societies, urging them, for example, to join mutual defense alliances such as the recently proposed coalition among Big Ten universities and to sign on to the American Association of Colleges and Universities’ “Call for Constructive Engagement” that rebuked the administration’s attacks. And they should demand that instead of capitulating, their institutions bring and support litigation against attempts to suppress academic freedom, free speech, and freedom of association; to unlawfully cancel grants and revoke visas; and to infringe on universities’ independence to develop their own curricula and academic policies. After all, executive orders are unilateral directives, not laws or legislation.

Furthermore, institutions should provide free legal counsel to imperiled international students and researchers and speak loudly and publicly about the meaning and value of academic freedom, the power of diverse and inclusive communities in driving societally valuable innovations, and the incredible returns of investing in modern research universities.

Though these demands are made of our institutional leaders, senior scientists can also act on their own initiative to help defend the higher education and scientific communities and their work from attacks meant to discredit and marginalize them.

Acknowledge and Activate

What can these scientists do? For starters, they can keep up-to-date about the shifting landscape of relevant federal, state, and institutional policies and responses. Many timely resources can help with this. I joined the chapter of the American Association of University Professors (AAUP) at the University of Michigan in Ann Arbor, where I work, for this purpose.

Senior scientists can support early-career colleagues and students by helping them, in turn, stay informed of policy developments, by actively listening to and understanding their concerns, and by providing opportunities for career and community networking and professional development during these uncertain times. Universities frequently offer mentoring resources and tool kits that can help, and programs such as AGU’s Mentoring365 enable connections within and across peer groups. They can also support each other across campuses, and seek allies in other disciplines, recognizing that attacks on the arts, humanities, and STEM (science, technology, engineering, and mathematics) fields are all connected.

Scientists should be contacting and meeting with local, state, and federal elected officials to convey the impacts of funding cuts and attacks on students, scholars, research, and innovations.

Further, scientists should be contacting and meeting with local, state, and federal elected officials. Scientists should use those meetings to convey the impacts of funding cuts and attacks on students, scholars, research, and innovations, citing real examples from their home institutions. At the University of Michigan, for example, scores of grants and contracts (including two of my own) have been canceled or not renewed, either because they were not compliant with administration ideology on DEI (diversity, equity, and inclusion), health equity, or environmental justice, or because of agency program eliminations and budget cuts. These cuts have directly halted student research experiences and led to layoffs and withdrawals of graduate admissions offers.

Although local and state officials cannot directly change federal policy, scientists can help focus their attention on the local impacts of federal actions. Further, these leaders’ concerns often carry a different weight within political decisionmaking. A federal congressperson may respond differently to a state senator from their own political party than they would to the concerns of 10 scientists.

Senior scientists can also work with their professional societies and organizations to file litigation against unjust actions, and provide programming (e.g., career counseling) and financial support (e.g., waived conference registration fees) for students and colleagues directly affected. And if needed, they can push their professional societies to take stronger stances. The powerful statement by the American Academy of Arts and Sciences offers a model that every nonprofit professional society should emulate. Even if institutions or societies have adopted neutrality statements, or are nonprofits prohibited from lobbying activities and whose memberships have diverse views, there is clear rationale to speak out and act against policy changes that directly affect their missions.

In short, senior scientists must acknowledge the severity of the threats to the scientific and higher education communities from the administration’s actions and activate to support local and national efforts to counter the threats. Together with the leaderships of their institutions and professional societies, they must defend these communities—particularly their more vulnerable members—and the value and integrity of the work they do. The stakes are high: Lives and careers are being jeopardized, and brilliant scientists are being driven away. We must act to preserve the American partnership that created diverse, federally supported research universities before the damage is permanent.

Author Information

Mark Moldwin (mmoldwin@umich.edu), University of Michigan, Ann Arbor

Citation: Moldwin, M. (2025), Senior scientists must stand up against attacks on research and education, Eos, 106, https://doi.org/10.1029/2025EO250181. Published on 9 May 2025 2025. This article does not represent the opinion of AGU, Eos, or any of its affiliates. It is solely the opinion of the author(s). Text © 2025. The authors. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

Newly Discovered Algae May Speed Melting of Antarctic Ice

Fri, 05/09/2025 - 13:07

Alex Thomson, an algal ecologist with the Scottish Association for Marine Science, had planned to study coastal blooms of microalgae during his 2023 trip to Robert Island in Antarctica. But after arriving, he and his colleagues made a discovery that would change their mission.

Scientists have known for years that ice in the Arctic is teeming with microscopic algae. But aside from a few scattered observations, nobody knew whether such blooms were widespread in Antarctica’s ice caps (an ice cap is a type of gently domed glacier flowing outward in all directions). Thomson and his colleagues decided to collect a few samples from the Robert Island ice cap while they were there.

Researchers found a diversity of species of Ancylonema, purplish, conical algae that can form in chains. Credit: Alex Thomson

When they got the samples under a microscope, it was clear that the ice was a bustling hub of algal activity. “As we started to uncover this during the field season, we shifted our focus and took what was happening on the ice cap more seriously,” Thomson said.

In a study published in Nature Communications, the researchers revealed the extent and diversity of algae they found inhabiting the ice. Their findings warn that algae, whose pigments absorb heat from the Sun, may be accelerating the melting of Antarctic ice at a rate greater than previously thought.

“It’s the first paper quantifying that process in Antarctica,” said Alexandre Anesio, an Arctic algae expert at Aarhus University in Denmark who wasn’t involved in the new study.

Widespread Blooms and Unexpected Diversity

Scientists sampled from 198 locations and examined WorldView-2 satellite images from February 2023, which revealed darkened patches of ice indicative of algal blooms. On the basis of their sampling and the satellite images, the scientists estimated that algal blooms covered around 20% of the ice cap’s surface.

The newly discovered algal communities may represent one of the largest photosynthetic habitats in Antarctica. Researchers had previously estimated that all detectable photosynthetic life in Antarctica covered approximately 44 square kilometers. The ice cap algal blooms on Robert Island alone were equivalent to about 6% of that area.

“We were seeing this huge morphological diversity, loads of forms of Ancylonema that I’d never seen described in any of the literature.”

The scientists also found a diverse range of species in their samples. The most prevalent genus of ice algae, Ancylonema, has an elongated “sausage shape and can form in chains,” Thomson said. “We were seeing this huge morphological diversity, loads of forms of Ancylonema that I’d never seen described in any of the literature.”

Genetic analysis revealed that the Antarctic ice cap contains Ancylonema species that are similar to those found in the Arctic, but also others that were distinct. Some genetic lineages appear unique to Antarctica, suggesting that these communities may have evolved in isolation over millions of years.

Dark Pigments Accelerate Antarctic Ice Melt

Thomson was excited by the diversity of algae, but said the finding could have troubling implications.

When a researcher on the team used a backpack device that Thomson said “looks a bit like a piece of Ghostbusters apparatus” to measure how much light reflected off the ice’s surface, they discovered that areas of ice containing algae reflect significantly less light than areas without algae. The purple pigment within Ancylonema, which it uses as sunscreen to protect itself from ultraviolet radiation, absorbs more energy and heats the surrounding ice.

“This study gives a big preview of what can happen in Antarctica if you start to have warm summers.”

Through modeling, they found that algae can contribute up to around 2% of the total daily melting on the ice cap. Though the figure isn’t as high as it is in Greenland, where dense blooms can increase melt rates of the ice surface by 13%, scientists are concerned that warmer temperatures may allow more algae to grow, which would cause more heat to be absorbed into the ice caps. “That 2% is probably going to look more similar to Greenland” in the future, Anesio said.

Currently, climate models do not account for microorganisms’ contributions to melting. To Anesio and Thomson, studies like this highlight why that needs to change. “This study gives a big preview of what can happen in Antarctica if you start to have warm summers,” Anesio said.

—Andrew Chapman (@andrewchapman.bsky.social), Science Writer

Citation: Chapman, A. (2025), Newly discovered algae may speed melting of Antarctic ice, Eos, 106, https://doi.org/10.1029/2025EO250174. Published on 9 May 2025. Text © 2025. The authors. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

NOAA Halts Maintenance of Key Arctic Data at National Snow and Ice Data Center

Thu, 05/08/2025 - 15:50
body {background-color: #D2D1D5;} Research & Developments is a blog for brief updates that provide context for the flurry of news regarding law and policy changes that impact science and scientists today.

The National Snow and Ice Data Center (NSIDC) may no longer actively maintain or update some of its snow and ice data products after losing support from NOAA’s National Centers for Environmental Information, according to a 6 May announcement.

 
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Data products affected by the decision are used to monitor the impacts of climate change in the Arctic, and include the center’s Sea Ice Index, Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, and World Glacier Inventory. “All of these data products as well as others in the NOAA@NSIDC collection face uncertain futures without ongoing support,” NSIDC wrote in an email to users posted on Bluesky.

While the data products won’t disappear, they will no longer be maintained at their current levels. 

“This change in support limits our ability to respond quickly to user inquiries, resolve issues, or maintain these products as thoroughly as before,” the NSIDC said in a statement to Inside Climate News

NSIDC, based at the University of Colorado, Boulder, is a prominent polar research institute. Its Sea Ice Index, in particular, has been a crucial source of data for scientists tracking the decline of sea ice cover in the Arctic. The threatened data sets are also used by Alaskan communities for weather prediction, inform fisheries and ecosystem management, and support “countless other Arctic geopolitical and security decision-making needs,” Zack Labe, a climate scientist and former NOAA staff member, told Inside Climate News.

This is horrible. I don't even know what to say. Some of our most key polar data."As a result, the level of services for affected products below will be reduced to Basic—meaning they will remain accessible but may not be actively maintained, updated, or fully supported."nsidc.org/data/user-re…

Zack Labe (@zacklabe.com) 2025-05-06T20:08:25.918Z

The decision to end support of the NSIDC products is the latest in ongoing efforts from the Trump administration to take important environmental data offline, though some nonprofits, scientists, and advocacy groups are working to recreate some of the lost data tools. 

A NOAA webpage lists data products that have been decommissioned since President Trump took office, including data from marine monitoring buoys, coastal ecosystem maps, seafloor data, and satellite data tracking hurricanes. In a 21 April announcement, the University-National Oceanographic Laboratory System, a group that coordinates U.S. ocean research, suggested that those interested in salvaging data products planned for decommissioning in 2025 should nominate those datasets for backup by the Data Rescue Project, a volunteer archiving effort.

NSIDC is asking scientists and educators who rely on these data products and would like to demonstrate the importance of these data sets to share their stories at nsidc@nsidc.org.

—Grace van Deelen (@gvd.bsky.social), Staff Writer

These updates are made possible through information from the scientific community. Do you have a story about how changes in law or policy are affecting scientists or research? Send us a tip at eos@agu.org. Text © 2025. AGU. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

那些科学上认为不应该存在的河流

Thu, 05/08/2025 - 12:18
Source: Water Resources Research

This is an authorized translation of an Eos article. 本文是Eos文章的授权翻译。

河流汇入下游,顺坡而下,最终汇入海洋或终端湖泊:这些是水道和流域运作的基本规律。但规律就是用来打破的。Sowby和Siegel在美洲列出了九条违背水文学预期的河流和湖泊。

所有河流都存在分叉现象,即河流分成几条支流,继续向下游流动。但与典型的分叉不同,这些河流在分叉后不会回到主水道。

例如,南美洲的卡西基亚雷河(Casiquiare)是一条可通航的水道,它连接着美洲大陆最大的两大流域——奥里诺科河(Orinoco)流域和亚马逊河(Amazon)流域,既是前者的支流,也是后者的支流。作者写道,它“在水文学上相当于两个星系之间的虫洞”。卡西基亚雷河从奥里诺科河分叉,蜿蜒流经茂密、近乎平坦的雨林,汇入里内格罗河(Rio Negro),最终汇入亚马逊河。该研究的作者指出,轻微的坡度(小于0.009%)足以使大量的水顺流而下,这种不寻常的情况是由于河流被不完全捕获造成的。他们指出,对卡西基亚雷河的理解仍在不断加深。

1717年,荷兰殖民者首次绘制了苏里南遥远的韦安博河(Wayambo)的地图。这条河可以向东或向西流动,这取决于降雨量和人类使用水闸对流量的改变。它还靠近金矿和铝土矿开采以及石油生产地点,其双向流动使得预测污染物的扩散变得困难。

研究人员称,在他们调查的所有河流中,位于加拿大荒野高地的埃奇马米什河(Echimamish River)是“最令人费解的”。它的名字在克里语中的意思是“双向流动的水”。这条河连接了海耶斯河和纳尔逊河,根据一些记载,埃奇马米什河从它的中部流向这两条更大的河流。然而,它的河道平坦,间或被海狸水坝阻隔,导致即使在今天,人们仍然无法确定它的流向以及它究竟在何处发生了变化。

作者还探索了另外六条奇特的水道,包括有两个出口的湖泊和同时流入大西洋和太平洋的小溪。通过这些研究,他们强调了关于地球水体如何运作,我们仍有许多未知之处有待探索。(Water Resources Research, https://doi.org/10.1029/2024WR039824, 2025)

—科学撰稿人Rebecca Dzombak

This translation was made by Wiley本文翻译由Wiley提供。

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33.8 Million People in the United States Live on Sinking Land

Thu, 05/08/2025 - 09:01

Land subsidence is typically considered a coastal problem: The dual threats of sinking land and rising seas intensify flooding, particularly in places like New York City and Louisiana. But even inland, major cities face infrastructure problems and flooding damage from sinking land beneath. 

“Land subsidence does not stop at coastal boundaries.”

A study published in Nature Cities has found that all 28 of the most populous cities in the United States are sinking. Though some of this subsidence is due to long-term geologic processes, much of it is spurred by human activity, including groundwater pumping and the building of new infrastructure. Better groundwater management and stricter building codes could mitigate risks.

“Land subsidence does not stop at coastal boundaries,” said Leonard Ohenhen, a postdoctoral researcher at Columbia University and the first author of the new study. 

From Coast to Coast, and in Between

Rates of sinking or uplifting land, also known as vertical land motion, can be measured from satellites via synthetic aperture radar (SAR), a technology that sends radar pulses to Earth and records how those pulses are reflected back. Ohenhen and the research team used SAR measurements from 2015 to 2021 from the Sentinel-1 mission to create maps of ground deformation in the 28 most populous U.S. cities.

The team found that in every city, at least 20% of the land area was sinking, and in 25 of the 28 cities, at least 65% of the land area was sinking. Estimates from the study show that about 33.8 million people live on sinking land in these 28 cities. 

The study shows a “really good assessment of what the whole local and regional picture of vertical land motion looks like,” said Patrick Barnard, a geologist at the University of California, Santa Cruz Center for Coastal Climate Resilience, who was not involved in the new study. “It gives us more and more confidence and a greater understanding of how [subsidence] is influencing urban areas and increasing the risk to the population.”

Maps created by Ohenhen and his colleagues show which cities are experiencing uplift (positive vertical land motion values) and subsidence (negative vertical land motion values). Credit: Ohenhen et al., 2025, doi.org/10.1038/s44284-025-00240-y

Some of the highest rates of subsidence (>4 millimeters per year) were observed in several cities in Texas: Houston, Fort Worth, and Dallas. The fastest-sinking city in the country was Houston, with more than 40% of its land subsiding at a rate greater than 5 millimeters per year.

Chicago, Detroit, New York, and Denver were among the cities with the most land area affected by subsidence.

Some of the rates described in the study were “alarming,” Barnard said, because typical background subsidence is below a couple of millimeters per year. Rates above 2 millimeters per year can damage infrastructure and buildings, he said.

Vertical land motion is especially problematic where land is sinking unevenly, or where a subsiding region is next to an area that’s rising.

Analyzing building densities and land deformation, the researchers found that San Antonio faces the greatest risk, with one in every 45 buildings at a high risk of damage.

What may seem like slow sinking can build up over time to cause problems, Ohenhen said. “Four millimeters per year becomes 40 millimeters over 10 years, and so on…that cumulative effect can add up.”

Getting Ahead of Ground Deformation

A now-absent ice sheet may be responsible for some of the land deformation. Tens of thousands of years ago, the Laurentide Ice Sheet covered much of North America, compressing the land beneath. Now that the ice sheet has melted, North America is readjusting. Land once underneath the ice sheet is generally rising slowly, while land not covered by the ice sheet is sinking. Ohenhen compared this process to relieving pressure on a mattress: Once pressure is released, some parts of the mattress rise while others sink back to their original height. 

Most of the subsidence described in the study, though, likely comes from groundwater pumping, which decreases pressure in the pore space of rock and sediment. The pore space slowly collapses and the ground sinks.

“We can’t just be pumping the ground without any regard to the potential long-term impacts.”

That can exacerbate flooding and infrastructure damage. Groundwater pumping and oil and gas extraction near Houston caused land subsidence that correlated with flood severity after Hurricane Harvey in 2017, for example.

As climate change continues to intensify drought conditions in some parts of the United States, land subsidence from groundwater pumping could become even more of a risk to infrastructure. An “increasing number of cities may face significant challenges in subsidence management,” the study authors wrote. 

“It’s really a major issue we have to consider, especially in these urban areas,” Barnard said. “We can’t just be pumping the ground without any regard to the potential long-term impacts.”

The risks posed by land subsidence are high enough to warrant policy changes to better manage groundwater pumping across the country, Barnard said. Better enforcement of building codes could also prevent damage, the paper’s authors wrote.

“People are often not attuned to some of these subtle hazards they may be exposed to,” Ohenhen said. “[We should] make people aware of the situation so that we do not wait until the very last moment to respond.”

—Grace van Deelen (@gvd.bsky.social), Staff Writer

Citation: van Deelen, G. (2025), 33.8 million people in the United States live on sinking land, Eos, 106, https://doi.org/10.1029/2025EO250178. Published on 8 May 2025. Text © 2025. AGU. CC BY-NC-ND 3.0
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Images of the source of the 28 April 2025 landslide / GLOF at Vallunaraju in Peru

Thu, 05/08/2025 - 08:01

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides.

A few days ago I highlighted the severe landslide and GLOF that occurred on the flanks of Vallunaraju in Peru, on 28 April 2025, which caused substantial damage and at least two fatalities. This appears to have been initiated by a landslide on the mountain flanks, triggering a hazard chain that led to the disaster downstream.

Loyal reader Christopher Cluett kindly got in touch. He was climbing on the flanks of the mountain when the chain of events occurred, and has kindly provided both a narrative and some images. I am reproducing these with his permission.

“The weather has not quite stabilized for the season, so over the course of the week we were there, there were heavy afternoon rains. Earlier in the week on 4/23 to acclimatize, we hiked through the valley to Laguna Llaca and back out on the road, so we have some beforehand pictures. Some pictures attached show previous slide activity at the same location. The previous slide was much smaller, as were the rock sizes. The road had been recently repaired from the recent slide in the last few weeks (if I recall correctly) – they installed a drainage tube under the road and backfilled it. When we were hiking out on the road on 4/23, there were 4 people taking soil samples (or running some type of soil testing).

“On 4/27 we hiked up to the Moraine Camp (~4900m). On 4/28 at 2:30 am, we left Moraine Camp for the summit. We heard consistent rockfall all morning while we were approaching the glacier. Then around 3:30 am, when we were transitioning to the glacier, we heard a freight train loud slide. I would assume this was the main event. Our summit route then started to take us away from the main rockfall area, so slide noises diminished. On the way back by the rockfall area, we continued to hear lighter rock fall. There are some pictures of what we think was the main rockfall face (not shown but below this face are two smaller glacier lakes). Our guide suspected the rockfall overflowed the lakes and subsequently created the landslide into the valley.

“You can see in other pictures the road was destroyed. We had to quickly cross it to get out of the valley to meet our transportation. It was evident looking in the valley on the drive out that large boulders showed mud/water markings of very high river levels (maybe 5-6 ft). A lot of the cattle from the valley had congregated on the high part of the road towards the valley entrance.

“It is a bit alarming to see all the slide activity throughout the area. The region is clearly heavily impacted by climate change. If you look at the road to the next valley over, it also has a lot of recently landslide activity.

These two images show the valley before the day before the 28 April 2025 event:-

Looking down valley, old slide present (04-23-2025) Old Slide Activity at Same Location (04-23-2025)

This map shows the locations of the images of the landslide:-

A map showing the locations of the rockslide images.

These images show the area from which the rockslide originated:-

The source area of the rockslide. The source area of the rockslide.

And these images show the aftermath:-

The aftermath of the landslide. The aftermath of the landslide. The aftermath of the landslide. The aftermath of the landslide. The aftermath of the landslide. The aftermath of the landslide. The aftermath of the landslide.

Many thanks for Christopher for these amazing images.

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First Benchmarking System of Global Hydrological Models

Wed, 05/07/2025 - 14:20
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: Journal of Advances in Modeling Earth Systems 

Benchmarking, or comparing models against each other using observational data to identify which performs better under specific conditions (and potentially why), is essential for advancing climate prediction. However, the hydrological community has lacked a global benchmarking framework, largely due to the complexity of allocating gauge data to model grids (see figure above).

Zhou et al. [2025] address this challenge by introducing an automated gauge allocation method that is applicable across various hydrological models. Through a test application using the global river model CaMa-Flood (Catchment-based Macro-scale Floodplain) with runoff inputs, they demonstrate that incorporating bias-corrected runoff data significantly improves model performance across a range of observational variables and performance metrics. This advancement paves the way for more rigorous intercomparisons of global hydrological models and facilitates the inclusion of hydrological components in broader model intercomparison initiatives, such as the Coupled Model Intercomparison Project (CMIP7).

Citation: Zhou, X., Yamazaki, D., Revel, M., Zhao, G., & Modi, P. (2025). Benchmark framework for global river models. Journal of Advances in Modeling Earth Systems, 17, e2024MS004379. https://doi.org/10.1029/2024MS004379

—Kei Yoshimura, Associate Editor, JAMES

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Los incendios forestales amenazan los suelos volcánicos de los Andes peruanos

Wed, 05/07/2025 - 13:26

This is an authorized translation of an Eos article. Esta es una traducción al español autorizada de un artículo de Eos.

En Septiembre del 2018, un incendio forestal arrasó con aproximadamente 2,000 hectáreas de matorrales alrededor de Pichu Pichu, un volcán inactivo de los Andes peruanos.

Esta no sería la primera vez. En los últimos años, han incrementado los incendios en este ecosistema único, causados principalmente por actividades humanas como la deforestación y la agricultura de tala y quema. Un nuevo estudio publicado en la Spanish Journal of Soil Science ha revelado que estos incendios no solo dañan la vegetación, sino también el suelo. Incluso cuatro años después de los incendios del 2018, el estudio concluyó que el vulnerable suelo volcánico seguía sin recuperarse.

“Los Andes peruanos no están listos para los incendios forestales”.

“Los Andes peruanos no están listos para los incendios forestales”, dijo Jorge Mataix-Solera, autor principal y científico del suelo de la Universidad Miguel Hernández en España, quien ha pasado más de tres décadas estudiando el impacto de los incendios en diferentes tipos de suelo.

En la región peruana de Arequipa y ubicado a 3,700 metros sobre el nivel del mar, se encuentra el matorral de Pichu Pichu, uno de los lugares más áridos del mundo y considerado un desierto frío, con temperaturas que oscilan entre los 4°C y los 18°C. A diferencia de otros ecosistemas áridos, como los bosques del Mediterraneo o las praderas del Cerrado en el centro de Brasil, las plantas alrededor de Pichu Pichu no han desarrollado características que las ayuden a adaptarse a los incendios forestales, como cortezas gruesas o semillas que germinen con el fuego. Para rematar, debido a las características arenosas del suelo, este es naturalmente seco y altamente hidrofóbico.

Muestreo del suelo y examinación de las plantas

Los investigadores ya tenían sospechas del gran impacto que tendrían los incendios en la región. Pero para comprender de mejor manera el cómo, se recolectaron 40 muestras de suelo de Pichu Pichu tres y cuatro años después del desastre de 2018, siendo la mitad de zonas quemadas y la otra mitad de zonas no quemadas.

Investigadores analizaron el suelo debajo de dos especies de arbustos abundantes en la zona que se vieron afectados por los incendios forestales en la zona de Pichu Pichu. Crédito: Jorge Mataix-Solera

Los análisis físicos y químicos revelaron que los incendios forestales causaron una grave pérdida de carbono en el suelo, que persiste incluso cuatro años después del incidente. El carbono del suelo es un indicador clave para conocer su salud, ayuda a que la tierra retenga agua, nos habla sobre la presencia de materia orgánica, es indispensable para su fertilidad y ayuda a prevenir la erosión. La pérdida de carbono también provoca que el suelo se compacte, haciendo que este se vuelva inhóspito para que crezcan nuevas plantas.

Además de haber analizado la pérdida de carbono, los investigadores también se encargaron de estudiar el impacto que tiene la combustión en diferentes plantas del suelo. Para esto se recolectaron muestras de suelo debajo de las plantas que predominan en la zona: Berberis lutea, un arbusto que se mantiene sus hojas verdes todo el año conocido coloquialmente como “palo amarillo”, y Parastrephia quadrangularis, otra especie de arbusto mas pequeña conocida como tola-tola.

En un incendio forestal, las plantas se comportan como la mecha de una vela, el fuego se concentra en un punto y lo que ocasiona que aumenten las temperaturas en el suelo. Como ya se esperaba, los investigadores descubrieron que el suelo debajo del palo amarillo sufrió mas daños tras un incendio forestal, posiblemente porque al ser un arbusto grande, representaba una mayor fuente de combustible.

La incineración de la vegetación fue otro factor que causó daño al suelo, debido a que las plantas suelen retener humedad y ayudan a filtrar agua al suelo. Sin las plantas, el agua fluye sobre la superficie del suelo, causando una fuerte erosión y pérdida de materia orgánica. “Esta es una problemática muy particular en ecosistemas como Arequipa, donde la lluvia llega en periodos cortos y muy intensos”, afirmó Minerva García Carmona, coautora del estudio y edafóloga de la Universidad Miguel Hernández.

Además, Carmona destacó que la destrucción de la vegetación nativa de estas áreas amenaza directamente a la biodiversidad, y puede tener efectos a largo plazo en la fortaleza de los ecosistemas.

Mataix-Solera tuvo resultados similares en investigaciones previas donde se estudiaron los suelos de Torres del Paine en la Patagonia chilena, los cuales se vieron afectados por un incendio en 2011.

Incendios más intensos

Para Stefan H. Doerr, un experto en incendios forestales suelos de la Universidad de Swansea en el Reino Unido, este nuevo estudio es muy importante, ya que los suelos de los Andes han sido poco estudiados. “Conocemos poco sobre los incendios en los suelos poco aptos al fuego de los ecosistemas andinos”, destacó Doerr, señalando que los suelos de origen volcánico son los más fértiles, además de que alimentan al 10% de la población mundial.

En los últimos años, Perú ha experimentado un aumento considerable en los incendios forestales, causados principalmente por el pastoreo y actividades con fines agrícolas, como la quema y remoción de vegetación. En 2024, más de 200 incendios forestales afectaron a casi todas las regiones del país, exceptuando a dos, y más de 2,200 hectáreas de pastizales fueron destruidas, de acuerdo con el Instituto Nacional de Defensa Civil del Perú.

“Estos ecosistemas son muy frágiles, y lo mejor que podemos hacer es evitar las actividades humanas que ocasionan este tipo de incendios.”

A medida que el clima cambia y las temperaturas aumentan en el mundo, se tiene previsto que los incendios sean más comunes, especialmente en lugares áridos como los Andes peruanos, dificultando aún más la recuperación de los ecosistemas. “El problema con el cambio climático es que está ocurriendo en un periodo muy corto de tiempo, y los ecosistemas no pueden desarrollar estrategias para adaptarse a él”, destacó Mataix-Solera.

Los científicos han mencionado algunas estrategias, como del mantillo o acolchado, que podrían ser probadas para la recuperación del suelo. El mantillo consiste en cubrir el suelo dañado con materia vegetal, como hojas o aserrín, para disminuir la erosión y ayudar a las plantas a crecer.

Sin embargo, los investigadores insisten en que la solución definitiva para los daños causados por los incendios forestales es evitarlos desde el comienzo. “Estos ecosistemas son muy frágiles, y lo mejor que podemos hacer es evitar las actividades humanas que ocasionan este tipo de incendios”, dijo Mataix-Solera.

Sofia Moutinho (@sofiamoutinho.bsky.social), Escritora de ciencia

This translation by Oscar Uriel Soto was made possible by a partnership with Planeteando y GeoLatinas. Esta traducción fue posible gracias a una asociación con Planeteando and GeoLatinas.

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NIH Bans U.S. Scientists From Funding New International Partnerships

Wed, 05/07/2025 - 12:51
body {background-color: #D2D1D5;} Research & Developments is a blog for brief updates that provide context for the flurry of news regarding law and policy changes that impact science and scientists today.

The National Institutes of Health (NIH), the world’s largest funder of biomedical research, announced a policy on 1 May banning scientists from directing its funding to international research partners, according to Nature

A statement from NIH said the agency would not halt foreign subawards—funding that U.S. researchers direct to international research partners—from existing grants “at this time,” but that by October, it will not renew or issue foreign subawards. Last year, the NIH issued about 3,700 subawards to foreign institutions.

The new policy may affect critical international health research and research with humanitarian applications, such as projects investigating HIV prevention, malaria treatments, maternal health, and cancer. 

 
Related

“If you can’t clearly justify why you are doing something overseas, as in it can’t possibly be done anywhere else and it benefits the American people, then the project should be closed down,” wrote Matthew J. Memoli, the principal deputy director of the NIH, in an email obtained by Nature. 

Coordinated international research on disease outbreaks keeps U.S. residents safe, Francis Collins, former director of the NIH, told Nature: “Disease outbreaks that start anywhere in the world can reach our shores in hours.” Halting international investigations into infectious diseases is “short-sighted and self-defeating,” he said.

The move could also delay clinical trials for new medical therapies, which rely on the participation of many subjects with particular illnesses. For a childhood cancer therapy, for example, “it could take decades to complete a trial if you only enroll children in the U.S.,” E. Anders Kolb, chief executive of the Leukemia & Lymphoma Society, told the New York Times. “When we collaborate with our international partners, we can finish these trials much more quickly and get the therapies to children as soon as possible.”

The Trump administration has already terminated hundreds of grants from NIH, targeting projects having to do with Covid-19, misinformation, transgender health, and climate change. One prominent environmental health journal, Environmental Health Perspectives, announced last week it would pause accepting new studies for publication amid uncertainty surrounding its NIH funding. The Trump administration’s proposed budget would cut NIH funding by about 40%, or about $18 billion. 

“These decisions will have tragic consequences,” Collins told Nature. “More children and adults in low-income countries will now lose their lives because of research that didn’t get done.”

—Grace van Deelen (@gvd.bsky.social), Staff Writer

These updates are made possible through information from the scientific community. Do you have a story about how changes in law or policy are affecting scientists or research? Send us a tip at eos@agu.org. Text © 2025. AGU. CC BY-NC-ND 3.0
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Organic Radiocarbon Reveals its Inorganic Ancestry in Lake Geneva

Tue, 05/06/2025 - 17:10
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: Journal of Geophysical Research: Biogeosciences

“Le Léman”, Lake Geneva, is the title and subject of F.-A. Forel’s seminal book series (1892-1904) that examines its catchment, climate, organisms, and solutes such as carbon and organic matter (OM), essentially establishing “limnology” as a holistic freshwater science. At the time, Forel wondered whether it was possible to fully understand the dynamics of organic material in the lake’s water, given that the influencing factors were so complex, and the variation in concentration so small. Today, we have detailed knowledge about the aquatic carbon cycle, but because much of this comes from the study of smaller and organic-rich northern lakes, it is still uncertain what actually applies to lakes of Geneva’s type.

Adding a piece to this longstanding puzzle, White et al. [2025] analyze the spatiotemporal dynamics of organic and inorganic (radio-)carbon dissolved in Lake Geneva and its biggest tributary, the Rhone. Using detailed data on the carbon composition and age, the researchers substantiate that organic carbon (OC) is primarily sourced from the lake’s large inorganic carbon (IC) pool by photosynthesizing plankton, rather than being imported from catchment soils and vegetation.

However, the authors also find exceptions to this rule. Glacial meltwater bears a characteristic signature of old organic matter and young IC that revealed large carbon imports to the lake during the record heat of 2022. Quantitative understanding of such inflows is important for comprehending the functioning of lakes in a warming alpine region. In the future, glaciated catchments will reach “peak water”, after which the receding glaciers contribute less and less to summertime streamflow, potentially exporting from former glaciated/permafrost areas more soil-derived OC, nutrients and also more IC.

These results also coincide with a renewed interest in lakes’ IC dynamics and associated calcite precipitation. During past investigations of terrestrial exports of carbon and energy, hardwater lakes were largely overlooked. Due to the simultaneous CO2 and calcite (CaCO3) formation by plankton (owed to the precipitation stoichiometry), hardwater lakes can become counterintuitive aquatic greenhouse gas sources. Better knowledge about the carbon sinks and sources there, as provided by the authors, consolidates the mechanisms active in similar, numerous and ecologically important peri-alpine lakes. Surely, Forel would approve.

Citation: White, M. E., Mittelbach, B. V. A., Escoffier, N., Rhyner, T. M. Y., Haghipour, N., Janssen, D. J., et al. (2025). Seasonally dynamic dissolved carbon cycling in a large hard water lake. Journal of Geophysical Research: Biogeosciences, 130, e2024JG008645. https://doi.org/10.1029/2024JG008645

—Maximilian Lau, Associate Editor, JGR: Biogeosciences

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Decoding Crop Evapotranspiration

Tue, 05/06/2025 - 13:40
Editors’ Vox is a blog from AGU’s Publications Department.

Evapotranspiration is a scientific measurement representing the combined sum of evaporation from the soil (or water) surface to the atmosphere and transpiration from plants, where liquid water inside the plant tissue vaporizes and enters the atmosphere, predominately through stomata. This topic cuts across many disciplines and is important to understand as crops are subjected to increasing environmental stress and management practices.

new article in Reviews of Geophysics explores the effects of changing environments, abiotic stresses, and management practices on cropland evapotranspiration. Here, we asked the lead author to give an overview of evapotranspiration, how scientists measure it, and what questions remain.

Why is it important to study cropland evapotranspiration?

As a key component of water balance in agricultural systems, evapotranspiration represents the ultimate consumption of agricultural water resources.

Evapotranspiration (ETa) is intricately linked to crop physiological activities and closely coupled with carbon cycle processes. As a key component of water balance in agricultural systems, evapotranspiration represents the ultimate consumption of agricultural water resources. Moreover, variation of regional cropland evapotranspiration reflects the changes of the regional agro–ecological environment. The varying vegetation cover and irrigation methods in cropland will lead to differences in mass and energy exchanges between the surface and the atmosphere, which in turn further affect the local climate and atmospheric circulation. Therefore, accurate evapotranspiration information is important for the development of irrigation systems, establishment of crop planting zones, implementation of regional water–saving agriculture practices, efficient assessment of water resources, and effective development, management, and allocation of water resources, among others.

What sets your review paper apart from previous reviews on this subject?

Given the significance of evapotranspiration, there are numerous reviews covering this subject. The varying perspectives concerning evapotranspiration have been recently reviewed, such as the role of evapotranspiration in the global, terrestrial, and local water cycles; the modeling, climatology, and climatic variability of global terrestrial evapotranspiration; best practices for measuring evapotranspiration; evapotranspiration partitioning methods; land-scale evapotranspiration from a boundary-layer meteorology perspective; spatiotemporal patterns of global evapotranspiration variations and their relations with vegetation greening. However, there is a gap in covering issues related to cropland evapotranspiration, which exhibits high variability due to its fast response to numerous factors.

There is a need to re-examine the primary factors influencing cropland evapotranspiration given the proliferation of long-term manipulation experiments, advancements in estimation models, and exponential growth in new and improved measuring methods at multiple spatial and temporal scales. In our new review, the focus is on factors encompassing key changing environments, abiotic stresses, and management practices that impact cropland evapotranspiration, along with their quantification methods.

What different methods are used for measuring evapotranspiration?

Evapotranspiration can be measured by using several methods such as plant physiology, hydrological, micro-meteorological, and remote sensing methods for different spatial and temporal scales. The leaf and plant scale transpiration can be measured by (potometer) portable photosynthesis system and sap flow method, respectively. The plot and field scale evapotranspiration can be determined by water balance, weighting lysimeter, sap flow plus micro-lysimeter, Bowen-ratio energy balance, eddy covariance, residual in the energy balance, surface renewal, and (microwave) scintillometer method. For regional scale evapotranspiration, remote sensing energy balance and remote sensing using vegetation indices are common methods.

Measurement methods for cropland evapotranspiration. Credit: Qiu et al. [2025], Figure 4

What factors do scientists consider when deciding to use one method over another?

When selecting methods to measure evapotranspiration, scientists prioritize a balance between spatial-temporal requirements, accuracy, and practicality. The choice often hinges on the scale of study: small-scale methods, such as weighting lysimeters or eddy covariance methods, provide high-resolution field-level data but lack regional coverage, whereas satellite-based remote sensing methods offer broader spatial insights at the cost of finer temporal or spatial resolution. Accuracy demands must also align with resource constraints: high-precision tools, like weight lysimeters and eddy covariance, require high financial investment, technical expertise, and maintenance, while low-cost methods, such as the water balance method, introduce large error. Environmental context further guides decisions, such as, uniform vegetation may favor Bowen-ratio energy balance and eddy covariance systems.

What are the main factors that affect cropland evapotranspiration?

Cropland evapotranspiration is affected by the meteorological conditions (e.g. radiation, air temperature, relative humidity, wind speed), changing environments (e.g. elevated carbon dioxide concentration (e[CO2]), elevated ozone concentration (e[O3]), global warming), various abiotic stresses (e.g. water, salinity, heat stresses, waterlogging), management practices (e.g. planting density, mulching, irrigation method, fertilizer application, control of diseases and pests, soil management), underlaying surface (e.g. geography, soil types), and crop–specific factors (e.g. crop type, variety, and development stages). The effect of meteorological conditions on evapotranspiration can be surrogated to a reference evapotranspiration. Therefore, in this review, the focus is on the impacts of key changing environments (e[CO2], e[O3], and global warming), abiotic stresses (water, salinity, and heat), and management practices (planting density, mulching, irrigation method, and nitrogen application) on cropland evapotranspiration.

Factors affecting cropland evapotranspiration. Credit: Qiu et al. [2025], Figure 3

What major conclusions have been drawn about these factors?

There is general agreement that e[O3], water and salinity stresses, and adopting drip irrigation all lead to lower total growing–season evapotranspiration for almost all crops. However, total growing–season evapotranspiration in response to e[CO2], warming, heat stress, planting density, and nitrogen application were inconsistent across studies.

The impacts of e[CO2] and e[O3], water and salinity stresses on total growing-season evapotranspiration are mainly through stomatal conductance, the ability of soil to conduct water to roots, development of roots and leaf area, microclimate, and possibly phenology. The effect of warming on total growing–season evapotranspiration can be largely explained by both variations in ambient growing–season mean temperature and growing duration. Total growing-season evapotranspiration in response to heat stress (or mulching and appropriate nitrogen supplement) is a compromise between reduced (or enhanced) transpiration and increased (or decreased) evaporation, along with possibly a shortened growth period. Differences in evapotranspiration under varying planting densities can be explained by the direct and indirect effects of leaf area on the constitutive terms of evapotranspiration. The variation of total growing–season evapotranspiration under drip irrigation compared to conventional irrigation was affected by smaller soil wetting area, shortened growing season, less energy partitioning to evapotranspiration, and changes in crop characteristics and microclimate.

What are some of the remaining questions where additional modeling, data, or research efforts are needed?

  1. The influence of elevated ozone concentration on stomatal conductance can be represented using an adjusted version of the Jarvis function. However, there has been little effort to integrate this response into the Penman-Monteith model, which is used to estimate evapotranspiration.
  2. Many controlled manipulation experiments are underreported varying types of warming on crop evapotranspiration. Water balance method, the residual in the energy balance method, sap flow plus micro–lysimeters, or even weighting lysimeters can be used to observe cropland evapotranspiration under several warming scenarios.
  3. There are few studies on evapotranspiration responses to heat stress, and most are based on pot experiments in phytotrons or artificial climate chambers. Obtaining larger–scale data of evapotranspiration under heat stress is beneficial to understand heat stresses on evapotranspiration.
  4. Models for describing effects of elevated CO2 and ozone concentration on evapotranspiration using a modified Priestley–Taylor and crop coefficient models are rarely reported. More efforts are needed to develop and test these two models.
  5. In practice, cropland evapotranspiration is jointly affected by multiple factors. The impact of multiple factors on cropland evapotranspiration is a complex and multifaceted phenomenon that requires long–term consideration of many environmental stressors and their interactions.

—Rangjian Qiu (qiurangjian@whu.edu.cn, 0000-0003-0534-0496), Wuhan University, China

Editor’s Note: It is the policy of AGU Publications to invite the authors of articles published in Reviews of Geophysics to write a summary for Eos Editors’ Vox.

Citation: Qiu, R. (2025), Decoding crop evapotranspiration, Eos, 106, https://doi.org/10.1029/2025EO255015. Published on 6 May 2025. This article does not represent the opinion of AGU, Eos, or any of its affiliates. It is solely the opinion of the author(s). Text © 2025. The authors. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

Mapping the Ocean Floor with Ancient Tides

Tue, 05/06/2025 - 12:49
Source: Journal of Geophysical Research: Oceans

In shallow coastal waters around the world, mud and other fine-grained sediments such as clay and silt form critical blue carbon sinks. Offshore infrastructure such as wind turbines and oil platforms, as well as fishing practices such as bottom trawling, can have major effects on the seafloor. So knowing the locations of these mud-rich sedimentary deposits is key to making coastal management decisions.

Ward et al. set out to map three mud depocenters—large offshore muddy deposits—in the coastal waters around Great Britain and Ireland. The mud-rich areas they selected were Fladen Ground, northeast of Scotland in the North Sea; the Celtic Deep, southeast of Ireland; and the Western Irish Sea Mud Belt, in the Irish Sea.

Their location at the bottom of the ocean makes these muddy deposits notoriously difficult to map. Furthermore, contemporary sedimentary deposits do not necessarily stem from modern conditions—some deposits are relicts from past ocean behavior.

To address these challenges, the authors built a paleotidal model that can re-create factors dictating the behavior and movement of ocean water, such as water depth and the speed and path of tidal currents. They reconstructed ancient seafloor topography using past sea level changes interpreted via glacial isostatic adjustment models. Using this reconstruction, they were able to simulate the tidal conditions driving the formation of the mud deposits as far back as 17,000 years ago.

The model revealed that mud settled differently across the three focal areas. In the Celtic Deep and the Western Irish Sea Mud Belt, mud appears to have accumulated over the past 10,000 years and continues to accrue today. Conversely, in Fladen Ground, the mud deposits are the result of past sea conditions and are preserved by today’s calmer tidal conditions. The results demonstrate how modeling past conditions can help map today’s carbon stores, especially in data-limited areas. The approach offers a valuable tool for managing coastal waters and preserving blue carbon, the authors say. (Journal of Geophysical Research: Oceans, https://doi.org/10.1029/2024JC022092, 2025)

—Aaron Sidder, Science Writer

Citation: Sidder, A. (2025), Mapping the ocean floor with ancient tides, Eos, 106, https://doi.org/10.1029/2025EO250172. Published on 6 May 2025. Text © 2025. AGU. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

Patterns of fatal non-seismic rockfalls in Spain

Tue, 05/06/2025 - 06:11

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides.

A fascinating new paper (Corominas et al. 2025) has just been published in the journal Geoenvironmental Disasters that describes the compilation and analysis of a new dataset on fatal non-seismic rockfalls in Spain. The dataset extends back for 220 years – a remarkable feat in itself – although the detailed analysis focuses on a 150 year period between 1872 and 2021. Even better, the paper has been published open access and under a creative commons license, which means that the information can be widely circulated.

Over the period of the study, Corominas et al. (2025) identified 1,118 fatal rockfalls in Spain, causing 1,550 deaths. This is the occurrence with time:-

Temporal distribution of rockfall events and fatalities in Spain within the last 220 years. Source: Corominas et al. (2025).

The reason for starting the analysis in 1872 is clear. It is always most interesting to look at the event rate (rather than the number of deaths) – the grey line – as this is less noisy.

It is notable that the rate has fluctuated considerably with time, but that there is a distinct increase in the last 20 years.

Corominas et al. (2025) have put a great deal of effort into understanding these trends. They correctly note that a fatal rockfall is the consequence of a complex interaction of a range of factors, which can include the topography, the climate, human modification to slopes and changes to vulnerability. To illustrate this, take a look at these two graphs, from the paper:-

Temporal evolution of the number of victims caused by landslides on quarries and excavations grouped by decades. Vertical dashed blue lines represent the wettest periods identified. Source: Corominas et al. (2025). Evolution of the number of victims of road accidents caused by rockfalls. grouped by decades. Vertical dashed blue lines represent the wettest periods. Source: Corominas et al. (2025).

As before, take a look at the event rate (the grey lines). In the case of quarries and excavations, the event rate has dropped very substantially in more recent years. This is the result of changes to regulation and practice in quarries – in other words, these locations have simply become safer. The authors describe this in some detail:-

“The reason must be sought in the operational changes introduced in the quarries. One hundred years ago, quarries and slope cuts were excavated with non-technical criteria or with poor engineering design. In our opinion, the observed decrease is due to improvements in excavation procedures and the adoption of occupational safety measures. These include the Regulation of Basic Mining Safety Standards in force since 1985 and the Occupational Risk Prevention Law in force since 1996. Studies on occupational and mining safety in Spain have highlighted the role of safety standards and safety measures and risk prevention in the substantial reduction of accidents.”

On the other hand, the event rate on roads has increased dramatically, although number of actual deaths shows no clear trend. A part of this might be better reporting – perhaps rockfalls in remote mountain areas are better reported than in the past. However, Corominas et al. (2025) note the following:-

“…[T]he vast majority of events occur in mountain roads, including those of the Canary Islands and the Balearic Islands. It is therefore logical to assume that the higher incidence is due to the increase in traffic on the most dangerous mountain road sections.”

And…

“The increase in the number of victims contrasts with the investment made by the administration in mitigation measures against rockfalls and the execution of road bypasses as mentioned in the previous section. This apparent lack of effectiveness of the set of preventive actions has been observed on other mountain roads … In any case, the trend of increasing accidents highlights the difficulty of risk management on roads that cross mountain ranges following the course of the main river valleys. These are stretches affected by a diffuse hazard originated far above the road and with innumerable source areas.”

Similar increases in events and losses were also noted in mountain trails and in coastal settings, which Corominas et al. (2025) ascribe primarily to changes in human activity – i.e. more recreational activities in the mountains and on the coast. As someone once put it to me, rather starkly, there are simply more targets in these locations than used to be the case.

This summary does no more than skate over the surface of a really fabulous piece of work. There s huge insight and richness in the data, demonstrating the complexity of these events. It would be fantastic to see more studies of this type.

Reference

Corominas, J., Lantada, N., Núñez-Andrés, M.A. et al. 2025. Fatal non-seismic rockfalls in SpainGeoenvironmental Disasters 12 [17]. https://doi.org/10.1186/s40677-025-00317-9.

Return to The Landslide Blog homepage Text © 2023. The authors. CC BY-NC-ND 3.0
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A Great Whale Conveyor Belt Transports Nutrients Across Oceans

Mon, 05/05/2025 - 12:39

Whale carcasses sinking to the ocean floor bring a buffet of nutrients to the deep sea. But whales don’t have to be dead to be big movers of nutrients. Migrating baleen whales transport more than 3,700 tons of nitrogen and more than 46,000 tons of biomass each year from high-latitude feeding areas to warm, shallow breeding waters near the tropics, according to a recent study published in Nature Communications.

“In places like Hawaii, or the Caribbean, or the coastal waters of Western Australia, where nitrogen is often a limiting nutrient, migrating whales can have a big impact on the local biogeochemistry,” said Joe Roman, lead author of the new study and a conservation biologist at the University of Vermont.

“It’s a bit like adding fertilizer to a garden in New York City,” he said. “On the scale of the entire city, any change is probably undetectable, but the garden is profoundly affected.”

Roman and his colleagues found that in some breeding areas, the transport of whale-borne nutrients like nitrogen can be as significant as that from nonbiological processes, such as nutrient-rich upwellings. In the Hawaiian Islands Humpback Whale National Marine Sanctuary, nitrogen brought in each day by migrating humpback whales can be 125%–175% that of nitrogen from abiotic processes during the breeding season.

Though whales move only a small portion of the total nutrients swirling through the oceans, they still have a significant effect on the ecosystems in the breeding area, according to Matt Savoca, a marine ecologist at the Stanford University Hopkins Marine Station, who wasn’t involved with the study. “It’s a bit like adding fertilizer to a garden in New York City,” he said. “On the scale of the entire city, any change is probably undetectable, but the garden is profoundly affected.”

Nitrogen in Whale Pee

Roman and his colleagues used publicly available databases and whale sightings from ships and aerial surveys to estimate populations in feeding and breeding areas. They focused on gray, humpback, and right whales. (They avoided other baleen whales such as blue, fin, and minke because less is known about the migration patterns of these species.)

To calculate how much nitrogen migrating whales transport to breeding areas, the researchers turned to a perhaps unexpected animal: the northern elephant seal. “What makes northern elephant seals and baleen whales similar is that they are both capital breeders,” Roman said. Capital breeders bulk up for part of the year while in their feeding grounds. Then, after traveling to their breeding areas, they gestate, give birth, and lactate, all while fasting. This behavior contrasts with that of income breeders, such as seabirds, which feed throughout the year.

The elephant seal is the only capital breeding marine mammal for which data on nitrogen levels in urine for feeding and lactating animals exist. The researchers used information on elephant seal urine and supplemented the calculations with limited existing measurements of urine from whales in feeding and breeding areas to estimate how much nitrogen whales transport. (They didn’t include data on whale feces because adult baleen whales that are not feeding while in the breeding areas rarely defecate.)

Each year, whale species in the study may be adding more than 3,700 tons of nitrogen and more than 46,000 tons of biomass—which includes placentas released during births as well as carcasses of newborn and adult whales that die—to breeding areas. More conservatively, mothers and calves alone may transport more than 2,300 tons of nitrogen and 12,000 tons of biomass per year.

The Great Whale Conveyor Belt

Scientists still don’t fully agree on why whales migrate, usually from cold, nutrient-rich waters in high latitudes to warmer, nutrient-poor tropical waters. Some baleen whales make tremendously long journeys—gray whales can travel more than 11,000 kilometers from the waters around Sakhalin Island, Russia, to Baja California, for example.

“Other mammals and birds also migrate long distances, but what makes baleen whales different is their size and the fact that they are capital breeders,” Roman said. That means “most of the waste generated by the whales in the breeding areas, from placentas to urine, introduces external nutrients into the ecosystems.”

And baleen whales urinate a lot; a 2003 study estimated that one fin whale can produce almost a thousand liters of urine each day. Even whales that are fasting while in the breeding areas urinate copiously because they are breaking down stored fats and proteins to make milk for calves. Whale urine contains many elements, including phosphorus, magnesium, potassium, and nitrogen. The researchers were interested in nitrogen because it is often a limiting nutrient in many marine ecosystems.

“This study helps us realize that whales are not only charismatic species, but they also provide vital ecosystem services by connecting environments separated by thousands of miles.”

The researchers estimate that the nitrogen that whales bring in could increase the amount of food available in breeding waters. Whale urine contains nitrogen mainly in the form of urea, which organisms such as phytoplankton can readily use to convert carbon dioxide into thousands of tons of biological carbon per year through photosynthesis.

Some uncertainty is unavoidable when researching large marine mammals that travel huge distances, Savoca said. “But the study provides data-driven estimates that are as good as it gets at this time.”

“We are at the early stage of understanding how the nutrients, like nitrogen, that the whales bring in move through the ecosystems and the food chain,” Roman said. This understanding is especially important as whale populations face various threats, including pollution and climate change. “This study helps us realize that whales are not only charismatic species, but they also provide vital ecosystem services by connecting environments separated by thousands of miles,” Savoca said.

—Adityarup Chakravorty, Science Writer

Citation: Chakravorty, A. (2025), A great whale conveyor belt transports nutrients across oceans, Eos, 106, https://doi.org/10.1029/2025EO250171. Published on 5 May 2025. Text © 2025. The authors. CC BY-NC-ND 3.0
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Rock Organic Carbon in Soils: Recycled or Just Passing Through

Mon, 05/05/2025 - 12:00
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: AGU Advances

There is increased interest in the potential to store carbon in soils to improve soil health and offset some fraction of fossil fuel emissions. One reason we think carbon is stable in soils is that it is old, as evidenced by radiocarbon dating.

However, Evans et al. [2025] point out that many soils are developed on sedimentary rocks or deposits that contain ancient organic matter. The authors highlight several questions that still need answering: how much can this petrogenic carbon contribute to soil carbon stocks and the old ages of deep soil organic matter? Is it just passively transiting the soil system to be eroded and eventually end up in sediments again, or is some of it metabolized within the soil? And finally, how important can its presence influence our interpretation of the cycling of biologically-sourced organic carbon in soil, aquatic, and sedimentary environments?

Citation: Evans, D. L., Doetterl, S., Gallarotti, N., Georgiadis, E., Nabhan, S., Wartenweiler, S. H., et al. (2025). The known unknowns of petrogenic organic carbon in soils. AGU Advances, 6, e2024AV001625. https://doi.org/10.1029/2024AV001625

—Susan Trumbore, Editor, AGU Advances

Text © 2025. The authors. CC BY-NC-ND 3.0
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New U.S. Budget Proposal Slashes Billions in Funds for Science

Fri, 05/02/2025 - 19:44
body {background-color: #D2D1D5;} Research & Developments is a blog for brief updates that provide context for the flurry of news regarding law and policy changes that impact science and scientists today.

President Trump’s proposed 2026 budget, released today, slashes non-defense discretionary spending by $163 billion, a 22.6% reduction from 2025.

In the budget request, sent from Russell T. Vought, director of the Office of Management and Budget, to Senate Appropriations Chair Susan Collins, Vought wrote that the suggestions came after a rigorous review of the 2025 budget, which was found to be “tilted toward funding niche non-governmental organizations and institutions of higher education committed to radical gender and climate ideologies antithetical to the American way of life.”

Among the proposed cuts:

 
  • A 9.4% cut, or $4.7 billion, to the Department of Energy
    • In addition, the budget proposes cancelling “over $15 billion in Green New Scam funds, committed to build unreliable renewable energy, removing carbon dioxide from the air, and other costly technologies burdensome to ratepayers and consumers.”
  • A 54% cut, or $5  billion, to the Environmental Protection Agency
    • This includes eliminating the EPA’s environmental justice program and atmospheric protection program, as well as cutting funds for the Hazardous Substance Superfund and the Clean and Drinking Water State Revolving Loan Funds.
    • “Trump’s plan to virtually eliminate federal funding for clean, safe water represents a malevolent disregard for public health. Even by Trump’s appalling standards, this direct attack on a benchmark water safety program is unconscionable,” said Food & Water Watch Executive Director Wenonah Hauter in a statement.
  • A 30.5% cut, or $5.1 billion, to the Interior Department, including $198 billion from the Bureau of Land Management, $900 million from the National Park Service, and $564 million from the U.S. Geological Survey
    • From the proposal: “Eliminates programs that provide grants to universities, duplicate other Federal research programs and focus on social agendas (e.g. climate change) to instead focus on achieving dominance in energy and critical minerals.”
  • A 24.3% cut, or $6 billion, to NASA, including a 47% cut to the science budget
    • Among many other cuts, the budget “eliminates funding for low-priority climate monitoring satellites,” “reduces Space Technology by approximately half,” and “terminate[s] unaffordable missions such as the Mars Sample Return Mission.” It suggests cutting the lunar Gateway, Space Launch System rocket, and Orion capsule, as well as the Office of Science, Technology, Engineering, and Mathematics (STEM) engagement. NASA’s overall cut takes into account a proposed $647 million budget increase for human space exploration.
    • In a statement, The Planetary Society urged Congress to reject the proposed budget, calling it “a historic step backward for American leadership in space science, exploration, and innovation.”
    • In a statement, the American Astronomical Society expressed “grave concerns” over these cuts, and said, “This will derail not only cutting-edge scientific advances, but also the training of the nation’s future STEM workforce.”
  • A 55.8% cut, or $4.9 billion, to the National Science Foundation
    • From the proposal: “The Budget cuts funding for: climate; clean energy; woke social, behavioral, and economic sciences; and programs in low priority areas of science. NSF has fueled research with dubious public value, like speculative impacts from extreme climate scenarios and niche social studies.”
  • An approximately 25% cut, or $1.5 billion, to NOAA
    • From the proposal: “The Budget terminates a variety of climate-dominated research, data, and grant programs, which are not aligned with Administration policy-ending “Green New Deal” initiatives.”

The budget proposal also includes suggestions to increase defense spending by 13%, to $1.01 trillion; and for “a historic $175 billion investment to, at long last, fully secure our border.”

Read more about the budget proposal at AGU’s The Bridge.

—Emily Dieckman (@emfurd.bsky.social), Associate Editor

These updates are made possible through information from the scientific community. Do you have a story about how changes in law or policy are affecting scientists or research? Send us a tip at eos@agu.org. Text © 2025. AGU. CC BY-NC-ND 3.0
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