Feed aggregator

Density and viscosity variations due to plume melting of a bilithologic mantle: Implications for asthenosphere and hotspot swell root dynamics

Earth and Planetary Science Letters - Wed, 12/03/2025 - 19:11

Publication date: January 2026

Source: Earth and Planetary Science Letters, Volume 673

Author(s): Jia Shao, Jason P. Morgan

Contrasting topography of continental large igneous provinces: Crucial role of crustal flow and intrusion dynamics

Earth and Planetary Science Letters - Wed, 12/03/2025 - 19:11

Publication date: January 2026

Source: Earth and Planetary Science Letters, Volume 673

Author(s): Xiaochuan Tian, W. Roger Buck

Temperature insensitive viscous deformation limits megathrust seismogenesis

Earth and Planetary Science Letters - Wed, 12/03/2025 - 19:11

Publication date: January 2026

Source: Earth and Planetary Science Letters, Volume 673

Author(s): Liam Moser, Matěj Peč, Camilla Cattania

Final differentiation of the lunar magma ocean: genesis of KREEP and the limited role of silicate liquid immiscibility

Earth and Planetary Science Letters - Wed, 12/03/2025 - 19:11

Publication date: January 2026

Source: Earth and Planetary Science Letters, Volume 673

Author(s): Weronika Ofierska, Max W. Schmidt, Christian Liebske, Paolo A. Sossi

P and S wave finite-frequency tomography reveals the impact of slab interference on mantle flow beneath the greater Alpine region

Earth and Planetary Science Letters - Wed, 12/03/2025 - 19:11

Publication date: January 2026

Source: Earth and Planetary Science Letters, Volume 673

Author(s): Yuantong Mao, Xiaotian Tang, Liang Zhao, Marco G. Malusà, Stéphane Guillot, Anne Paul, Stefano Solarino, Xiaobing Xu, Coralie Aubert, Elena Eva, Silvia Pondrelli, Simone Salimbeni, Lei Yang

THEORETICAL BOUNDS ON THE ALTIMETRY BIAS DUE TO EARTH’S CURVATURE IN GROUND-BASED GNSS REFLECTOMETRY

Publication date: Available online 27 November 2025

Source: Advances in Space Research

Author(s): Vitor Hugo de Almeida, Felipe Geremia-Nievinski

First study of polarization jet/SAID using onboard ionosonde on Ionosfera-M satellite

Publication date: Available online 27 November 2025

Source: Advances in Space Research

Author(s): A.A. Sinevich, A.A. Chernyshov, S.A. Pulinets, D.V. Chugunin, M.M. Mogilevsky

Spectral changes of the NWA 10580 meteorite under simulated space weathering: Insights from VIS-NIR and microXRD analyses

Publication date: Available online 27 November 2025

Source: Advances in Space Research

Author(s): Ákos Kereszturi, Ildikó Gyollai, Sándor Biri, Zoltán Juhász, Bernadett D. Pál, Richárd Rácz, Dániel Rezes, Béla Sulik, Máté Szabó, Péter Szávai, Zoltán Szalai

Ionospheric response of intense geomagnetic storms near the peak phase of solar cycle 25 at low mid-latitude Indian station, New Delhi

Publication date: Available online 27 November 2025

Source: Advances in Space Research

Author(s): Ankit Gupta, Qadeer Ahmed, Anshul Singh, Aashtha Rawat, Arti Bhardwaj, Puja Goel, A.K. Upadhayaya

Solar Wind-Driven Magnetospheric Current Variability During 2013 Storms: Ground and Space Observations

Publication date: Available online 27 November 2025

Source: Advances in Space Research

Author(s): Ephrem Tesfaye Desta, Sanjay Kumar, M.B. Moldwin, M.-C. Fok, EA Kebede, TH Eritro

Modeling Flood Susceptibility and Identifying Optimal Flood Shelters for Effective Flood Management in the Mahananda River Basin

Publication date: Available online 26 November 2025

Source: Advances in Space Research

Author(s): Dibyendu Ghosh, Somen Das

An ensemble MCDM strategy for orbit design in Genesis-like missions

Publication date: Available online 26 November 2025

Source: Advances in Space Research

Author(s): Miltiadis Chatzinikos, Pacôme Delva, Minjae Chang, Walid Aghouraf, David Coulot, Arnaud Pollet

Quantifying the Role of CME–CME Interactions in Geomagnetic Storm Severity: A Case Study Using EUHFORIA

Publication date: Available online 26 November 2025

Source: Advances in Space Research

Author(s): Somaiyeh Sabri, Stefaan Poedts

New study offers a glimpse into 230,000 years of climate and landscape shifts in the American Southwest

Phys.org: Earth science - Wed, 12/03/2025 - 14:40
Atmospheric dust plays an important role in the way Earth absorbs and reflects sunlight, impacting the global climate, cloud formation, and precipitation. Much of this dust comes from the continuous reshaping of Earth's surface through the erosion of rocks and sediments, and understanding how this process has shaped landscapes can help us decipher our planet's history—and its future.

When a Prayer Is Also a Climate Signal

EOS - Wed, 12/03/2025 - 14:25

As a child in Algeria in the late 1990s, Walid Ouaret remembers going to the mosque when droughts turned severe. There, he and his family would join their neighbors in a communal prayer for rain called the Salat al-Istisqāʼ. It was no informal event: The ceremony had been announced by the government.

“I was not a farmer, but I was feeling for other people from my own community,” remembered Ouaret, who’s now a Ph.D. candidate at the University of Maryland studying the intersections of climate and agriculture.

As he explored ways to improve the climate models he was using to understand the ramifications of climate change, Ouaret remembered the rain prayers. Rainfall patterns are changing globally due to climate change, but data from places like Algeria can be sparse. The Salat al-Istisqāʼ, on the other hand, is practiced across the Muslim world, which spans northern Africa, the Middle East, and Central Asia.

“I was trying to find a proxy, something that would tell me when food production was impacted or soil moisture was impacted at this regional [scale].”

“I was trying to find a proxy, something that would tell me when food production was impacted or soil moisture was impacted at this regional [scale],” he said. The call for rain prayers, he realized, could be a key data point revealing when droughts had become sufficiently severe to warrant state-led interventions.

In most instances, the ceremony is widely advertised, giving Ouaret a simple way of tracking its prevalence over time.

A New Kind of Climate Data

For research that will be presented on 18 December at AGU’s Annual Meeting 2025, Ouaret and his coauthors combed through mass media, including newspapers and websites, from Algeria, Morocco, and Tunisia from 2000 to 2024, looking for announcements of Salat al-Istisqāʼ. Then, they calculated how likely the calls for rain prayers were to correspond to drought conditions, as measured by the Standardized Precipitation Evapotranspiration Index.

Ouaret found a strong correlation between Salat al-Istisqāʼ notices and 6-month drought severity, which validated the announcement of rain prayers as a proxy for extreme weather. The environment wasn’t the only relevant influence on the calls to prayer, however. Ouaret said social unrest, as measured by conflict event data, was also associated with the announcement of rain prayers. That confluence is a sign, he said, that calls to prayer may also function as a governance tool for increasing social cohesion.

These kinds of data are valuable, as they illuminate areas of the planet with fewer reliable climate monitoring networks, said Jen Shaffer, an ecological anthropologist also at the University of Maryland, who wasn’t involved in the research.

“This sort of grassroots, bottom-up view is really valuable to get at areas where we don’t have weather stations.”

“People are getting signals of change going on in the environment that’s not easy to record with satellite data, or with all of our instruments,” Shaffer said. “This sort of grassroots, bottom-up view is really valuable to get at areas where we don’t have weather stations.”

The Maghreb and other regions of Africa are vulnerable to such lack of data, but agricultural communities around the world are beset by climate-induced challenges.

Rituals that ask for rain are common in cultures both past and present, from the kachina of the Pueblo cultures of the American Southwest to Catholic pro pluvia rogation ceremonies practiced in Spain to Days of Prayer for Rain in the State of Texas designated by the state’s governor in 2011. These practices offer both a historical record of drought and a potential input for climate models.

Adding cultural events to climate models, which are normally fed rigorously quantitative data, can be difficult, Shaffer noted. But Ouaret’s dataset benefits from the fact that a public, official announcement of rain prayers can be tied to specific dates and locations.

In the future, Ouaret believes his work could provide a potential early-warning system for drought vulnerability in specific communities, allowing more time to marshal aid to where it’s needed most. Data on the frequency of calls for rain prayers could also be a helpful tool for talking about climate change in affected communities, he said.

Communities “have been doing this in the past, but it was happening like once every 5 years. Now it’s happening every year,” Ouaret said. Incorporating calls for rain prayers into scientific models would be “validating [people’s] experience and telling them that it’s scientifically valid.”

The work also aligns with another goal for Ouaret, which is expanding the reach of open science in North Africa and other places underprioritized by Western researchers.

“Empowering people to do their science will help them so much to bring innovation to the whole community and bring a new way of addressing our traditional problems,” he said.

—Nathaniel Scharping (@nathanielscharp), Science Writer

Citation: Scharping, N. (2025), When a prayer is also a climate signal, Eos, 106, https://doi.org/10.1029/2025EO250450. Published on 3 December 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.

98% of Gaza’s Tree Cropland Destroyed by Israel

EOS - Wed, 12/03/2025 - 14:24

Two years of war in Gaza have taken a devastating toll on the people living there. Nearly 70,000 people, including more than 20,000 children, have been killed by Israeli attacks. Disease and famine have taken hold as Israel blocks the flow of food and medical aid into the territory. Several international human rights organizations have determined that Israel is committing genocide against Palestinians in Gaza.

Alongside the human casualties and the destruction of homes and infrastructure, the war has brought the widespread destruction of arable land. Agriculture comprised 32% of land use in Gaza before 7 October 2023, when Hamas, a recognized terrorist organization supporting Palestinian self-determination, attacked Israeli communities in Gaza and Israel launched a massive military response.

A recent analysis has tracked the destruction of tree cropland and greenhouses in Gaza since the start of the war. The analysis revealed that 70% of tree cropland and 58% of greenhouses were damaged or destroyed in the first year of the conflict. By the end of October 2025, 98% of Gaza’s tree cropland had been destroyed. Ninety percent of greenhouses were damaged, and 75% were destroyed.

“After 2 years, we see that most of the greenhouses are gone and the remaining tree cover is largely gone.”

“Now, after 2 years, we see that most of the greenhouses are gone and the remaining tree cover is largely gone,” said Mazin Qumsiyeh, a biologist and social justice advocate at Bethlehem University in the West Bank and a researcher on the project. He said that over the past 2 years, Gaza has endured an ecocide of agricultural lands.

“This is unprecedented damage,” said He Yin, a geographer and remote sensing researcher at Kent State University in Ohio and lead researcher on the project. “I have never seen anything like this,” said Yin, who previously studied other areas of armed conflict, including Syria and the northern Caucasus. Gaza, he said, has “become like a barren land.”

Gazan Agriculture Before the War

Farmers have been cultivating crops in Gaza and the surrounding land for thousands of years. Olive trees, in particular, have played an important cultural role throughout Palestinian and Israeli history, featuring prominently in celebrations, art, literature, and religion.

Prior to October 2023, Gaza’s agricultural sector made up 11% of the territory’s gross domestic product (roughly $575 million) and 45% of its exports. Palestinian farmers cultivated olive and citrus trees, as well as grapes, guava, dates, palms, and figs. More delicate fruits, vegetables, and flowers were grown in tunnels or other protective structures like greenhouses.

“Like everything else in Gaza, people managed and survived and resisted and did agriculture.”

“Gaza was not self-sufficient in foods, but [it] did produce significant number of products,” Qumsiyeh said. Despite Israel blocking rainwater harvesting and severely restricting Palestinian access to a shared aquifer, “like everything else in Gaza, people managed and survived and resisted and did agriculture,” he said.

The agricultural sector contributed to Palestinians’ food and economic security. Of Gaza’s 365 square kilometers of land, roughly 32% of it was used to grow food, mostly on small-scale family farms. Tree crops covered 23% of the Gaza Strip. Exports like olive oil, strawberries, and flowers found purchase in high-income markets across Europe, Qumsiyeh said, as well as the West Bank. And in years with enhanced drought or poor harvests, selling high-quality, shelf-stable products like olive oil could provide for a family in need.

Now, after 2 years of war, most agricultural land has been destroyed. Pinning down where, when, and how that happened is necessary for recovery and remediation, explained Najat Aoun Saliba, an atmospheric chemist at the American University of Beirut in Lebanon.

Saliba, also a member of Lebanon’s parliament, has studied the impacts of war-related pollutants on public and environmental health in Lebanon but was not involved with the new research about Gaza. Israel has used many of the same types of munitions to attack Gaza as it has to attack southern Lebanon, and Saliba suspects that the long-term environmental damage in Gaza might mirror what she has seen in her own country.

“The long-term environmental impacts of munitions include persistent heavy-metal and explosive residue contamination; persistent phosphorous materials that were used heavily at least in southern Lebanon; [unconfirmed] presence of radioactive materials…especially in the bunker buster ammunitions; reduced soil fertility and microbial imbalance; groundwater pollution and loss of irrigation capacity; and heightened erosion and desertification risks,” Saliba said.

Tracking the Destruction This animation tracks the damage to tree cropland in Gaza from October 2023 to October 2025. Undamaged croplands are colored green and turn purple in the month in which they sustained damage. Credit: Maps: He Yin, with data from Yin et al., 2025, https://doi.org/10.1016/j.srs.2025.100199, CC BY-NC-ND 4.0; Animation: Mary Heinrichs/AGU

The United Nations Satellite Center (UNOSAT) has been remotely monitoring the destruction of buildings, land, and infrastructure in Gaza since the start of the war. Their monthly agricultural damage assessments have shown widespread damage, but their methodology has some limitations when applied to a region as small as Gaza, Yin explained.

UNOSAT relies on data from the Sentinel-2 satellite, which has a nominal spatial resolution of 10 meters; that might not be the best choice for monitoring Gaza’s small-scale and sometimes fragmented agricultural land. What’s more, in such a rapidly evolving conflict, a monthly observing cadence is not able to track the progression of damage or trace the destruction of individual plots to specific military actions.

To overcome those challenges, Yin and his team turned to two commercial satellite data sources with higher spatial resolutions and daily monitoring: PlanetScope, with a nominal 3-meter resolution, and SkySat, with a nominal 50-centimeter resolution. The higher-resolution datasets allowed the team to create detailed land use maps of Gaza before October 2023, including tree cropland and greenhouses, and then track partial damage or total destruction of those plots every day since Israel’s war commenced.

Most of Gaza’s greenhouses have been damaged or destroyed during 2 years of war. The maps show how damage to greenhouses began in the north and progressed south. Undamaged greenhouses are marked with white circles, and damaged or destroyed greenhouses are marked with red circles. Greenhouses damaged or destroyed between October 2023 and October 2024 are on the left. Greenhouses damaged or destroyed between October 2024 and October 2025 are on the right. Credit: He Yin, with data from Yin et al., 2025, https://doi.org/10.1016/j.srs.2025.100199, CC BY-NC-ND 4.0

The researchers compared their damage maps to UNOSAT’s to validate their technique. They further validated their remote sensing results by consulting with Yaser Al A’wdat from the Palestine Ministry of Agriculture in Gaza and with other individuals on the ground, who checked whether certain areas flagged in the analysis as “destroyed” truly were. Those consultants in Gaza declined to be interviewed for this story out of concern for their safety.

The initial analysis covered the destruction of agricultural land through the first year of the war and was published in Science of Remote Sensing in February. The researchers found that 64%–70% of tree crop fields and 58% of greenhouses had been damaged by the end of September 2024, after almost 1 year of war. By the end of 2023, all greenhouses in the North Gaza and Gaza City governorates had been damaged, as well as nearly all greenhouses in the Gazan governorate of Deir al-Balah. The analysis showed how damage to both cropland and greenhouses progressed southward toward Khan Yunis and Rafah as Israel’s military campaign shifted focus.

The team continued its analysis through the second full year of the war, and those results, which will be presented on 18 December at AGU’s Annual Meeting 2025 in New Orleans, reveal the near-total destruction of tree cropland (98%) and increasing damage to greenhouses (90% damaged and 75% destroyed). Greenhouses in Rafah, in particular, suffered extensive and widespread damage as Israel’s military operation advanced south.

Remediate, Replant, Restore

Although a shaky (and repeatedly violated) ceasefire went into effect on 10 October, restoration and remediation will take time and very careful planning.

“Research like this can play a critical role in restoration and recovery efforts in Gaza by providing an evidence-based foundation for agricultural rehabilitation.”

“Research like this can play a critical role in restoration and recovery efforts in Gaza by providing an evidence-based foundation for agricultural rehabilitation,” Saliba said.

“This type of spatial assessment allows policymakers and humanitarian agencies to plan sequenced restoration—starting with fast-growing crops before replanting long-term trees like olives and citrus—and to design targeted compensation and replanting programs based on verified damage maps,” she added.

Future analyses seeking to map the scope of agricultural damage, as well as efforts to remediate that damage, should incorporate the food-energy-water nexus, Saliba said. “Because no agriculture restoration could happen without providing water.”

As focus turns toward restoration, the first thing that is needed are data, Qumsiyeh said. “For example, we don’t know the extent of soil contamination in Gaza and what residues of war are there, whether depleted uranium or white phosphorus or heavy metals and other things,” he said. “We don’t even have access to get the soil samples out of Gaza.”

There is also increased concern about aquifer contamination. When Israel flooded tunnels in Gaza with seawater, some of that water undoubtedly seeped through the ground into the aquifer that supplies most of the territory. In addition, Gaza has now seen three rainy seasons since the start of the war.

“All of that water from the rain will wash these pollutants from the soil down into the water aquifer,” Qumsiyeh said. “Again, we don’t have the data because we don’t have samples of water from the water aquifer to be able to test.”

If there were stronger international laws related to ecocide, Qumsiyeh said, data like that could hold those responsible to account.

At present, Israeli troops have partially retreated from the territory, but the area they still occupy beyond the so-called Yellow Line comprises much of Gaza’s agricultural land and is inaccessible to Palestinian farmers. According to the United Nations Office for the Coordination of Humanitarian Affairs, Israel continues to block the entry of agricultural inputs like seed kits, organic fertilizers, and materials needed to rebuild greenhouses.

“Agriculture is part of life. We are part of the land,” Yin said. Ultimately, “who has the power to rebuild Gaza really matters.”

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

Citation: Cartier, K. M. S. (2025), 98% of Gaza’s tree cropland destroyed by Israel, Eos, 106, https://doi.org/10.1029/2025EO250447. Published on 3 December 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.

Machine learning used to better predict New England floods

Phys.org: Earth science - Wed, 12/03/2025 - 14:18
New England's a complicated place, especially when it comes to flooding.

Hydrothermal Circulation and Its Impact on the Earth System

EOS - Wed, 12/03/2025 - 14:00
Editors’ Vox is a blog from AGU’s Publications Department.

In May 2023, a group of scientists gathered in Agros, Cyrpus, for an AGU Chapman Conference, “Hydrothermal Circulation and Seawater Chemistry: What’s the Chicken and What’s the Egg?” They discussed the role of hydrothermal fluxes in regulating ocean biogeochemistry and the Earth system. To share key finding from that conference—and other groundbreaking research on hydrothermal systems—the AGU book Hydrothermal Circulation and Seawater Chemistry: Links and Feedbacks came to life.

The latest volume in AGU’s Geophysical Monograph Series, this book explores on- and off-axis hydrothermal systems, boundary conditions such as climate and sedimentation history, and approaches for tracking oceanic processes. We asked the book’s Volume Editors about the latest methods and techniques, practical applications, and the future of the field of study.

In simple terms, what is hydrothermal circulation as it relates to seawater chemistry?

Hydrothermal circulation in this context is the flow of seawater through ocean crust.

Hydrothermal circulation in this context is the flow of seawater through ocean crust. It occurs at high-temperatures at mid-ocean ridges and at lower temperatures across much of the seafloor.

Along mid-ocean ridges, high-temperature (~400°C) reactions between seawater and crust turn the circulating seawater into hydrothermal fluids that become enriched in many elements such as potassium, calcium, and iron. Because these hot fluids are much less dense than cold seawater, the fluid flows rapidly upwards and vents at the seafloor. Cooling leads to precipitation of dissolved constituents forming chimney structures and particles carried by the fluid (the well-known “black smoke”). Other dissolved ions stay in solution and are added to the ocean, changing the composition of the seawater.

Hydrothermal circulation farther from mid-ocean ridges typically heats seawater by only 5–10°C and changes the chemical composition of the fluid much less than that of the hotter fluids. However, orders of magnitude more seawater circulates through low-temperature systems than high-temperature systems, making them equally important to seawater chemistry.

How do various boundary conditions impact hydrothermal processes in the ocean, and why is it important to study them?

The amount of fluid that flows through mid-ocean ridge hydrothermal systems depends on the geodynamic boundary conditions that control characteristics such as the average global rate of accretion of new oceanic crust and its thickness. These boundary conditions also control the types of rocks that make up the ocean crust, which impacts fluid–rock reactions and hence the composition of the fluid vented into the ocean. The composition and temperature of the deep seawater that circulates into the crust are also important boundary conditions controlling fluid–rock reactions and have both changed substantially over Earth’s history. For example, changes in the redox state of seawater over Earth’s history changed fluid–rock reactions and in-turn hydrothermal fluxes into the ocean.

What are the latest methods and techniques for studying hydrothermal circulation discussed in the book?

The book covers the latest methods and techniques for advancing various interdisciplinary fields focused on hydrothermal vents.

The book covers the latest methods and techniques for advancing various interdisciplinary fields focused on hydrothermal vents. For example, deploying novel instrumentation in the harsh conditions of high-pressure and high-temperature seafloor hydrothermal systems is improving studies of hydrothermal systems. Attaching instruments, such as Raman spectrometers and mass spectrometers, to seafloor cabled observatories will provide new insights into the dynamics of hydrothermal systems. Advancements in instrumentation will also significantly benefit the study of diffuse flow along mid-ocean ridges where fluids vent at tens of degrees Celsius rather than the much higher temperatures characteristic of “black smokers.” Diffuse venting circulates much more water, and probably more heat, than black smoker venting and yet has received only a fraction of the study. Scientists studying low-temperature seafloor hydrothermal systems distributed across the seafloor are starting to borrow methods used for studying continental weathering systems, which should lead to rapid progress being made in understanding these systems.

What practical applications do the studies presented in the book have for Earth system science?

Understanding the Earth system requires a quantitative understanding of the controls on global biogeochemical cycles. Currently, most models of global biogeochemical cycles either ignore hydrothermal systems or assume they do not change over time. However, there is now copious evidence that the fluxes of elements into and out of seawater due to hydrothermal systems are dependent on environmental conditions (e.g., climate, seawater chemistry) and hence do change over time. Furthermore, there can be feedbacks between the environment and the hydrothermal fluxes. This book will help people modeling the Earth system to better incorporate hydrothermal systems into biogeochemical models. In turn, the results of such models will become more robust.

Octopi brooding their eggs in warm water venting from the ocean crust near Davidson Seamount underwater volcano at a depth of 3,200 meters. Credit: Chad King / OET, NOAA

Where do you see the study of hydrothermal systems heading in the next 10 years?

The book features many exciting directions that the study of hydrothermal systems will hopefully take in the next decade. For example, there is a pressing need for more intense study of seafloor weathering until we understand it as well as we understand continental weathering. Expanding the availability of novel instruments that can be deployed at hydrothermal vents at mid-ocean ridges will advance the understanding of hydrothermal systems (e.g., during volcanic eruptions that are currently poorly understood). Vast potential also exists to better incorporate hydrothermal processes into Earth system models. Finally, a growth area for future research will be the role of hydrothermal systems on exoplanets and in the search for other habitable bodies. For example, NASA’s ongoing Clipper Mission to Jupiter’s moon Europa will hopefully enrich our understanding of the role of hydrothermal activity in controlling the habitability of this body.

How is the book organized?

After an introductory chapter, the next six chapters address hydrothermal processes at mid-ocean ridges. They consider both black smoker and diffuse flow systems, as well as the impact of these systems on the water column above mid-ocean ridges. The methods used to study hydrothermal systems, both in the lab and field, are also covered. An example of the fingerprint of changes in axial hydrothermal processes through changing seawater chemistry is discussed next. This is followed by three chapters about low-temperature hydrothermal systems that discuss how much more we have to discover about these systems. The last four chapters address the role of oceanic hydrothermal systems on planetary scale processes, both on Earth and other rocky bodies. They discuss how global-scale models work, how hydrothermal processes can be incorporated in such models, and how hydrothermal systems might work on other rocky bodies.

Who is the intended audience of the book? 

The audience for the book is intended to be broad—anyone interested in oceanic hydrothermal systems and/or ocean chemistry. People who are new to the field can use the book to get up-to-speed on ongoing interdisciplinary research in this area. This includes new graduate students or experienced researchers who have not previously considered the role of oceanic hydrothermal system in ocean chemistry. The book can also act as a starting point for researchers who develop global biogeochemical cycle models and who want to incorporate hydrothermal fluxes into these models. Finally, the book will appeal to people interested in planetary habitability and the role that hydrothermal systems may play in making other rocky bodies habitable, or the role hydrothermal systems may have played in nurturing early life on Earth.

Hydrothermal Circulation and Seawater Chemistry: Links and Feedbacks, 2025. ISBN: 978-1-394-22915-4. List price: $225 (hardcover), $180 (e-book)

Chapter 1 is freely available. Visit the book’s page on Wiley.com and click on “Read an Excerpt” below the cover image.

—Laurence A. Coogan (lacoogan@uvic.ca; 0000-0001-7289-5120), University of Victoria, Canada; Alexandra V. Turchyn (0000-0002-9298-2173), University of Cambridge, United Kingdom; Ann G. Dunlea (0000-0003-1251-1441), Woods Hole Oceanographic Institution, United States; and Wolfgang Bach (0000-0002-3099-7142), University of Bremen, Germany

Editor’s Note: It is the policy of AGU Publications to invite the authors or editors of newly published books to write a summary for Eos Editors’ Vox.

Citation: Coogan, L. A., A. V. Turchyn, A. G. Dunlea, and W. Bach (2025), Hydrothermal circulation and its impact on the Earth system, Eos, 106, https://doi.org/10.1029/2025EO255036. Published on 3 December 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.

Using Lightning-Induced Precipitation to Estimate Electron Belt Decay Times

EOS - Wed, 12/03/2025 - 14:00
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: Journal of Geophysical Research: Space Physics

Earth is surrounded by rings of energetic particles called radiation belts. The inner belt can sometimes be populated by megaelectron volt (MeV) energetic electrons during particularly strong solar storms. When moved by electromagnetic waves, these energetic particles can rain into the atmosphere.

Feinland and Blum [2025] show that periodic signatures of relativistic electron rain observed by satellites can be used to better predict when and where they might happen in the future. The authors find that these high-energy electrons usually came into the inner belt quickly after solar storms and gradually rained out over the course of a few weeks. During particularly quiet solar conditions, there were no detectable high-energy electrons in this region at all. These results are important to incorporate into models of the radiation belts, to better characterize and predict the high radiation environment in near-Earth space.

Citation: Feinland, M. A., & Blum, L. W. (2025). Lightning-induced precipitation as a proxy for inner belt MeV electron decay times. Journal of Geophysical Research: Space Physics, 130, e2025JA034258. https://doi.org/10.1029/2025JA034258

—Viviane Pierrard, Editor, JGR: Space Physics

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.

Tropical Australian study sets new standard for Indigenous-led research

Phys.org: Earth science - Wed, 12/03/2025 - 10:13
A new study highlights how Indigenous leadership, science and business can unite to protect coastal ecosystems while building long-term environmental and cultural knowledge.

Theme by Danetsoft and Danang Probo Sayekti inspired by Maksimer