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Antarctic ice melt can change global ocean circulation, sediment cores suggest

Phys.org: Earth science - 8 hours 6 sec ago
A new study shows that during the last two deglaciations, i.e., the transition from an ice age to the warm interglacial periods, meltwater from the Antarctic ice sheet intensified stratification in the Southern Ocean. The results highlight the key role of the Antarctic ice sheet on ocean circulation and the regulation of the global climate. The study was led by François Fripiat, a researcher at the Max Planck Institute for Chemistry and the Université Libre de Bruxelles, and was conducted in collaboration with researchers from Princeton University and the Alfred Wegener Institute. It is published in the Proceedings of the National Academy of Sciences.

Forward modeling of regional S-waveforms in the central-southern Apennines (Italy): evidences for lateral crustal velocity contrasts and shallow axial attenuation

Geophysical Journal International - 23 hours 8 sec ago
SummaryWe present a forward waveform modeling study to investigate the regional crustal structure of the central-southern Apennines, along a NNE-SSW profile. The profile cross-cuts the Apenninic chain axis and extends from the eastern Adriatic domain, characterized by a thick crust and thick seismogenic layer, to the western Tyrrhenian domain, dominated by tectonic thinning, distributed CO2 gas emissions at the surface and volcanic structures. This region hosted the largest earthquakes in recent history, making precise knowledge of the crustal structure crucial for a comprehensive understanding of seismogenesis and seismic hazard assessment. We analyzed and modelled seismic data from two lower-crustal strike-slip earthquakes in the eastern segment of the profile (2018 Mw 5.1 and 2023 Mw 4.6), recorded by the Italian National Seismic Network (IV). The two events, located along the target NNE-SSW linear profile, provide a unique opportunity to study the westward propagation and evolution of seismic phases. Using a 2D numerical modeling approach, we modelled direct (Sg) and Moho-reflected (SmS) phases on transverse component seismograms, comparing the synthetic to the observed waveforms in terms of arrival times and waveform shapes. A faster Adriatic lower crust with an average shear-wave velocity of 3.85 km/s supports the hypothesis of distributed crustal mafic intrusions at the margin between the Apenninic chain and Adriatic foreland. We estimate a local Adriatic Moho depth of 38 km, in agreement with previous investigations. Furthermore, we identify a strong attenuation zone across the Apenninic chain axis, extending directly from the surface down to 10 km depth, significantly impacting both seismogenic processes and waveform propagation. This first, regional-scale waveform study highlights the significance of waveform analysis for constraining seismic velocities and interface velocity contrasts in the Southern Apennines mountain range.

Creating Communities to Help Interdisciplinary Scientists Thrive

EOS - Fri, 02/13/2026 - 14:23

Scientists who work across disciplines often dread the question, “What is your field of expertise?” A geographer working in an environmental science department or a social scientist working in an ecology department might find it difficult to articulate how their research, knowledge, and professional networks fit within established fields to colleagues long accustomed to their institutions’ disciplinary expectations and norms.

Most academic structures are still largely organized around relatively narrow disciplinary perspectives, even as the world’s biggest challenges require interdisciplinary solutions.

These moments of discomfort may seem trivial, but they signal a systemic barrier for many scientists and for scientific innovation and problem-solving: Most academic structures are still largely organized around relatively narrow disciplinary perspectives, even as the world’s biggest challenges require interdisciplinary solutions. Addressing natural hazards, biodiversity loss, poverty, and food insecurity simultaneously, for example, depends on scientists collaborating across fields and engaging with partners in other sectors of society.

This issue is not just one of semantics, especially for younger scientists and others who regularly experience its effects. Departments incentivized to select against interdisciplinary science and the absence of clear institutional “homes” for interdisciplinary scientists can create challenges for hiring, evaluation, and promotion. It can also reduce researchers’ sense of professional belonging and increase their feelings of being an imposter, which can affect their ability to contribute and even lead to the loss of scientific talent to other career paths.

Experiences in the field of land system science reflect broader tensions with interdisciplinarity across academic science. Researchers studying land system science, as we do, often find that their work resists neat disciplinary labels. Because this field encompasses the many ways that people and nature interact across Earth’s land surface and how these interactions shape global challenges like biodiversity loss, it can be difficult to describe the field in terms of preexisting academic departments and to identify appropriate funding sources and publication venues.

Here we share experiences navigating tensions that have come with pursuing interdisciplinary science, and we describe how one global interdisciplinary science community, the Global Land Programme (GLP), became a home for our work. Communities such as the GLP not only bring people together but also help create new pathways for turning research into solutions.

Our experiences also suggest practical lessons and actionable steps—especially for early-career scholars—for finding or building supportive communities that span fields and sectors, foster belonging, spark scientific innovation, and connect science to society.

Perceived Deficiencies Versus Demonstrated Proficiencies

As interdisciplinary scientists working across institutions around the world, we’ve seen firsthand the tribulations of bridging silos. Colleagues have often questioned our scientific skills and seen us as outsiders. Some have asked whether our interdisciplinary doctoral degrees “count” as legitimate academic credentials or told us that our research “isn’t science.” Even after establishing our careers, we’ve heard comments such as “Your research doesn’t fit into this science foundation’s remit.”

These critiques can be especially harsh for researchers who already encounter structural barriers within scientific institutions [Liu et al., 2023; Bentley and Garrett, 2023; Woolston, 2021; Carrigan and Wylie, 2023]. Having other people—particularly colleagues around whom you work—define you by perceived deficiencies rather than demonstrated proficiencies is hardly constructive for advancing research into complex challenges.

The scientific literature reveals a disconnect between policy-level acceptance of interdisciplinarity and its practical adoption within academic and research institutions.

National- and international-level policies are increasingly encouraging interdisciplinary research. The European Union, for example, is adopting integrated One Health policy approaches that recognize the interconnections of human, animal, plant, and environmental health and require collaboration across previously distinct disciplines and sectors.

Yet the scientific literature reveals a disconnect between policy-level acceptance of interdisciplinarity and its practical adoption within academic and research institutions, showing that the barriers we’ve faced are widely shared [Andrews et al., 2020; Berkes et al., 2024]. Such obstacles include skepticism from peers, disciplinary prejudice, and funding and department structures that privilege individual, siloed fields. We often must frame research proposals as either social science or natural science, for example, because work that straddles or combines both rarely gets funded.

Unsupportive responses from funding agencies, departments, and colleagues can be demoralizing when added to the background stresses of academia. On the other hand, opportunities to commiserate and trade tips with others can be lifelines. Building communities of interdisciplinary scientists is thus essential, especially for younger scholars who often face the steepest barriers with disciplinary divides [Haider et al., 2018].

Discovering a Global Community

To thrive as an interdisciplinary scientist, one might need to “feel comfortable being uncomfortable” [Marx, 2022]. Achieving such confidence requires mentorship and peer relationships in community. In each of our cases, the GLP provided the professional and emotional support that we greatly needed to feel fulfilled in our careers.

As current or former members of the GLP’s Scientific Steering Committee, we are admittedly biased toward the program’s merits. Nonetheless, having come from different scientific backgrounds, career stages, and geographies, we believe that our collective experiences illustrate how global cross-disciplinary communities can cultivate a supportive culture and amplify the reach and impact of community members’ science.

The GLP emerged in the mid-2000s as a successor to earlier global change research projects focused on land use and land cover, with the goal of bringing together natural and social scientists to study land systems as coupled human-environment systems [de Bremond et al., 2019]. Since then, it has become the reference community for land system science, as well as a home for scientists whose work was falling through disciplinary cracks.

Speakers discuss the GLP’s Science Plan during the 5th Open Science Meeting in 2024. Credit: Ximena Fargas

The organization has been guided by a unifying programmatic framework—articulated in its Science Plan—that incorporates knowledge across disciplines to address pressing global challenges (e.g., biodiversity loss, food insecurity, and poverty). The Science Plan, reevaluated and updated every 5 years, offers a living, collaborative road map of interdisciplinary research priorities—a rarity in academia, where competition for resources and rewards often leaves scientists reluctant to share ideas.

This road map enables researchers to orient their work toward impactful cross-disciplinary research themes and projects. It also outlines the GLP’s core priorities and analytical perspectives, drawing on a range of viewpoints and knowledge, which can guide us to develop shared ideas of what is possible.

The Global Land Programme’s activities have built a culture of mutual respect that values ecological and cultural context and encourages engagement with a broad range of perspectives.

Over time, the collaborative spirit of the GLP’s members has resulted in a rich interdisciplinary community of land system scientists that provides a space for them to reflect on dimensions of academic life other than research (as exemplified, e.g., by this article). Besides offering a supportive professional environment, apart from the skepticism we often encounter in more discipline-specific settings, the GLP’s activities have built a culture of mutual respect that values ecological and cultural context and encourages engagement with a broad range of perspectives.

The GLP has also delivered tangible results for science and society. GLP scientists have advanced modeling of land use going back millennia, contributed to global biodiversity assessments (e.g., in support of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services), codeveloped new visions for land systems, and made datasets that help track land use changes, such as deforestation, publicly available. The GLP also works to translate land system science into forms relevant for policy and practice. For example, GLP scientists authored “Ten Facts About Land Systems for Sustainability,” a framework intended to inform both research and policy understandings of sustainable land governance.

What began as a space for researchers from across disciplines to connect around land system challenges has become an engine for both scientific innovation and societal relevance. This success adds to our trust in the GLP’s approach to supporting researchers in the often-challenging space of interdisciplinary science.

If You Don’t Have a Community, Make One

For interdisciplinary scientists lacking a home, one path forward is to build a new community of researchers with shared interests.

We were fortunate to find the GLP early in our careers, as not all scientists have access to such communities. But the comfort and confidence that come with belonging should not—and need not—depend on luck. For interdisciplinary scientists lacking a home, one path forward is to build a new community of researchers with shared interests.

Establishing a community of practice within a broader existing organization or research community or even creating a new forum for social networking can provide a space that empowers scientists, including early-career researchers, to navigate interdisciplinary work by connecting with peers who share related interests and challenges.

Experiences from existing communities of practice suggest that these spaces tend to work best when they grow organically [Watkins et al., 2018]. Making it easy for people to join, observe, and participate at their own pace helps create welcoming entry points and encourages such growth. Allowing people to gradually step in, share perspectives, and assume roles and responsibilities strengthens the common dynamic that often develops in these communities, in which a core of more active members is surrounded by a larger group of less active, though still involved, members.

In practice, many scientific communities thrive by communicating through simple and familiar platforms, such as mailing lists, online forums and channels, and recurring online meetups, which lower barriers to participation across institutions and regions. Reaching out to existing societies or research networks—AGU or FLARE (Forests & Livelihoods: Assessment, Research, and Engagement), for example—for guidance on coordination or to help gain visibility or seed funding can also help burgeoning communities avoid reinventing the wheel.

Furthermore, mentorship from people who have built research communities from the ground up in adjacent fields can be valuable for advising groups on how to grow and address challenges. Knowledgeable mentors can also help groups understand how to sustain a community, an aspect that is often critical to long-term viability.

The GLP was initiated as researchers working on different issues related to land began to connect, forging collaborations that eventually grew into a global network, which itself now comprises a variety of smaller networks, including working groups and regional (nodal) offices. The recently created Early Career Network, launched through webinars and other online communications, is providing a space where young scholars are encouraged to create their own governance structures and articulate what they need in terms of capacity building from the larger community.

Members of the GLP’s Scientific Steering Committee visit an agave farm in Oaxaca in 2024. Credit: Rieley Auger

Growing the GLP has not always been an easy process, however. Sustaining the community has required continually maintaining support and funding from multiple institutions. To date, much of the growth has relied on volunteer work, with members of the GLP’s Scientific Steering Committee, working groups, and nodal offices providing unpaid service above and beyond their existing professional responsibilities. This arrangement of distributed labor underscores the importance of effective coordination for maintaining connections and momentum across the network.

The experiences of the GLP and other groups show that new interdisciplinary communities can start small and run largely on volunteer energy, which we recognize is not something all researchers—especially those early in their career—have to spare. If the communities can then reach a critical mass of participants, they may be able to secure institutional support and professional coordination to help them thrive over the long term.

Harnessing Interdisciplinarity

We came to realize that with our expertise, we can generate innovative ideas that advance science at the intersections between disciplines.

Earlier in our careers, we used to internalize criticisms about not belonging or excelling in any one discipline. Then we came to realize that with our expertise, we can generate innovative ideas that advance science at the intersections between disciplines. Indeed, people with interdisciplinary profiles can fill critical research gaps—and should be seen as assets, not liabilities. Many universities and funders understand this truth at the leadership level, but challenges remain in how interdisciplinarity is evaluated within departments and by hiring, promotion, and grant review panels.

To help move the needle, we actively characterize ourselves as interdisciplinary land system scientists in our tenure and promotion documents, preferring to own the position and emphasize its strengths, rather than to shy away from it. Individuals acting on their own, however, may have only limited influence. That is why building and sustaining communities is so important: They create the collective weight needed to demonstrate value, shift norms, and motivate institutional change.

Within community-building efforts, it is key to create space for participation from researchers with varied backgrounds and experiences. The GLP supports this approach through its distributed subnetworks, including working groups and regional nodes, and by convening international Open Science Meetings on different continents that bring together hundreds of scientists every few years. GLP members frequently present on the program’s work as well as strategies and approaches at other conferences, helping spread the word about the value of growing interdisciplinary communities.

As more researchers connect across disciplinary and geographic boundaries, the scientific enterprise will be better positioned to pursue sustainable solutions that address complex, urgent problems to secure livelihoods and food security for the global population and to safeguard our planet’s biodiversity and environmental health.

References

Andrews, E. J., et al. (2020), Supporting early career researchers: Insights from interdisciplinary marine scientists, ICES J. Mar. Sci., 77(2), 476–485, https://doi.org/10.1093/icesjms/fsz247.

Bentley, A., and R. Garrett (2023), Don’t get mad, get equal: Putting an end to misogyny in science, Nature, 619, 209–211, https://doi.org/10.1038/d41586-023-02101-x.

Berkes, E., et al. (2024), Slow convergence: Career impediments to interdisciplinary biomedical research, Proc. Natl. Acad. Sci. U. S. A., 121(32), e2402646121, https://doi.org/10.1073/pnas.2402646121.

Carrigan, C., and C. D. Wylie (2023), Introduction: Caring for equitable relations in interdisciplinary collaborations, Catalyst Feminism Theory Technosci., 9(2), 1–16, https://doi.org/10.28968/cftt.v9i2.41070.

de Bremond, A., et al. (2019), What role for global change research networks in enabling transformative science for global sustainability? A Global Land Programme perspective, Curr. Opinion Environ. Sustainability, 38, 95–102, https://doi.org/10.1016/j.cosust.2019.05.006.

Haider, L. J., et al. (2018), The undisciplinary journey: Early-career perspectives in sustainability science, Sustainability Sci., 13, 191–204, https://doi.org/10.1007/s11625-017-0445-1.

Liu, M., et al. (2023), Female early-career scientists have conducted less interdisciplinary research in the past six decades: Evidence from doctoral theses, Humanit. Soc. Sci. Commun., 10(1), 918, https://doi.org/10.1057/s41599-023-02392-5.

Marx, V. (2022), Cross-disciplinary ways to connect and blend, Nat. Methods, 19(10), 1149, https://doi.org/10.1038/s41592-022-01622-z.

Watkins, C., et al. (2018), Developing an interdisciplinary and cross‐sectoral community of practice in the domain of forests and livelihoods, Conserv. Biol., 32(1), 60–71, https://doi.org/10.1111/cobi.12982.

Woolston, C. (2021), Discrimination still plagues science, Nature, 600(7887), 177–179, https://doi.org/10.1038/d41586-021-03043-y.

Author Information

Laura Vang Rasmussen (lr@ign.ku.dk), Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark; Rachael Garrett, Department of Geography and Conservation Research Institute, University of Cambridge, Cambridge, U.K.; A. Sofia Nanni, Instituto de Ecología Regional, Horco Molle, Yerba Buena, Argentina; also at Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina; Navin Ramankutty, School of Public Policy and Global Affairs and Institute for Resources, Environment and Sustainability, University of British Columbia, Vancouver, Canada; and Ariane de Bremond, Global Land Programme, Department of Geographical Sciences, University of Maryland, College Park

Citation: Rasmussen, L. V., R. Garrett, A. S. Nanni, N. Ramankutty, and A. de Bremond (2026), Creating communities to help interdisciplinary scientists thrive, Eos, 107, https://doi.org/10.1029/2026EO260058. Published on 13 February 2026. 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 © 2026. 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.

A New Way to Measure Quartz Strength at High Pressure

EOS - Fri, 02/13/2026 - 14:00
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: Journal of Geophysical Research: Solid Earth

Quartz is widely thought to control the mechanical strength of Earth’s continental crust, but measuring its strength at high pressure and temperature has long been challenging.

Medina et al. [2026] deform polycrystalline α-quartz at crustal pressure and temperature conditions while directly monitoring stress inside the sample using in situ synchrotron X-ray diffraction. Unlike traditional experiments that rely on external load measurements, this approach derives stress from lattice strain within the quartz itself, avoiding long-standing uncertainties related to friction corrections. The results show that quartz strength varies systematically with temperature, transitioning from lattice-resistance–controlled plasticity below 800 °C to dislocation creep at higher temperatures.

Remarkably, the new measurements are broadly consistent with classic deformation experiments despite the very different experimental techniques. The data also show little pressure dependence over the tested conditions, suggesting that temperature plays the dominant role in controlling quartz strength in much of the crust. These findings provide a more reliable experimental foundation for flow laws used to model crustal deformation, earthquakes, and mountain-building processes.

Citation: Medina, D. A. J., Kaboli, S., Patterson, B. M., & Burnley, P. C. (2026). Strength α-quartz: New results from high pressure in situ X-ray diffraction experiments. Journal of Geophysical Research: Solid Earth, 131, e2025JB032753. https://doi.org/10.1029/2025JB032753

—Jun Tsuchiya, Editor, JGR: Solid Earth

Text © 2026. 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.

Arctic peatlands are expanding as temperatures continue to rise, new research confirms

Phys.org: Earth science - Fri, 02/13/2026 - 10:10
The Arctic is warming faster than the rest of the planet, with average temperatures increasing by about 4°C in the last four decades. A new study, led by the University of Exeter, shows peatlands have expanded since 1950, with some peatland edges moving by more than a meter a year. The work has been published in Global Change Biology.

New study assesses potential dust control options for Great Salt Lake

Phys.org: Earth science - Fri, 02/13/2026 - 09:11
A new collaborative study, led by University of Utah Professor of atmospheric sciences Kevin Perry, provides policymakers, agency leaders, and the public with the most comprehensive assessment to date of potential dust control options for the Great Salt Lake, as declining water levels continue to expose vast areas of lakebed to wind erosion.

The exceptional occurrence of landslides in the 2025 South Asia summer monsoon

EOS - Fri, 02/13/2026 - 07:12

In NW India, rainfall in the 2025 monsoon was 27% above the long term average. Over 2,500 people were killed in India and Pakistan by landslides and floods as a result.

In India and Pakistan, the 2025 summer monsoon generated unusual amount of landslide activity. I described some of these events along the way, most notably in India. In Pakistan, it is much harder to get a good picture of the events that occur in the higher mountain areas.

A new open access paper (Sana et al. 2026) in the journal Landslides provides an initial commentary on these events. By their calculation, 1,528 people were killed in floods and landslides in India and 1,006 were killed in Pakistan.

The paper provides a description of some of the more serious events, which is in itself very helpful, but the most interesting aspect is the consideration of the underlying causes. Across all of India, the total monsoon rainfall was 10% above the long term average, but in Northwest India, which was most seriously impacted area, rainfall was 27% above the long term average. In addition, there was an unusually large number of shorter duration extreme rainfall events, which were primarily responsible for the landslides and floods. This graph, from Sana et al. (2026), provides the 2026 monsoon rainfall record for Mandi district in Himachal Pradesh, for example:-

Rainfall data for the monsoon months of June to August 2025 for Mandi district highlighting cloudburst events. Graph from Sana et al. (2026).

An example of these shorter rainfall events occurred in Khyber Pakhtunkhwa (KP) province between 14 and 25 August 2025, when a succession of cloudbursts triggered landslides and floods in Buner, Swat, Shangla, Mansehra and Dir districts, killing 504 people and leaving thousands more homeless.

But Sana et al. (2026) also remind us that rainfall alone is not the cause of these landslides and floods. Vulnerability has also increased dramatically – for example, there has been a sharp decline in forest cover across much of the area. There has also been growth in urban areas, often with poor planning control, meaning that much of the population is occupying more hazardous locations. And, as I have noted before, poor quality infrastructure development (especially road building) is driving instability across large swathes of hillslopes, rendering them vulnerable to the changed rainfall patterns.

I write on the morning after the decision by the frankly nonsensical decision by the Trump government to reverse the 2009 endangerment finding regarding greenhouse gases, an event that will be judged harshly by future generations. However, in the medium term, this will further exacerbate the issues of increasing rainfall intensities, which drive these horrific events.

It is really helpful that Sana et al. (2026) have provided this intial commentary and analysis of the 2025 monsoon landslides and floods. I will look forward to seeing more detailed analyses in due course.

Reference

Sana, E., Kritika & Kumar, A. 2026. Preliminary investigation of rainfall-induced landslides and related damages by the 2025 extreme monsoon in the Northwestern Himalayan regionLandslides. https://doi.org/10.1007/s10346-026-02703-2

Return to The Landslide Blog homepage Text © 2026. 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.

Researchers develop high-resolution daily atmospheric CO₂ dataset for China

Phys.org: Earth science - Fri, 02/13/2026 - 04:50
Researchers from the Aerospace Information Research Institute of the Chinese Academy of Sciences, in collaboration with Chongqing University of Posts and Telecommunications, have developed a high-resolution daily atmospheric carbon dioxide (CO2) dataset covering China from 2016 to 2020. The dataset offers new insights into the spatiotemporal variations of column-averaged dry-air CO2 mole fraction (XCO2). The work is published in the journal Scientific Data.

The effect of layer thickness and fluid conductivity contrasts on seismoelectric signals: insights from laboratory experiments and numerical simulations

Geophysical Journal International - Fri, 02/13/2026 - 00:00
SummarySeismoelectromagnetic (SE) signals are created in wet poroelastic media by electrokinetic conversions occurring at the pore scale. Two of these signals are frequently investigated: a co-seismic wavefield, bounded to the propagating seismic waves, and an electromagnetic (EM) wave created when a seismic wave passes through the interface between two porous media. Driven by the possibility offered by the SE signals in terms of vertical resolution, compared with seismic reflection methods, a restricted number of authors studied how a thin layer, or a combination of thin layers, can modify SE signals. In this context, the present work presents original experimental and numerical data as a means to further investigate the relation between the thickness of a layer and the EM interface-generated response (IR). In addition, the fact that the IR is very sensitive to contrasts in fluid conductivity, whereas seismic waves are not, is an appealing characteristic of SE exploration. Consequently, we explored the influence of the pore-fluid electric conductivity, combining experimental and numerical methodologies. We identified a strong similarity in how layer thinning affects both seismic waves and IR signals. Moreover, we observed that the maximum enhancement of an IR signal occurs when the layer thickness is approximately half the P-wave wavelength (λP) in the layer. When analysing the influence of fluid conductivity, we showed that the electrokinetic theory adopted in this study provides satisfactory predictions for the waveforms and amplitudes observed experimentally. Finally, we extrapolated our experimental results with field-scale simulations in order to understand how the effects observed experimentally translate to georesources applications.

Correction of Non-Linear Clock Drift: the BRAVOSEIS Ocean-Bottom Seismometer Network in the Bransfield Strait, Antarctica

Geophysical Journal International - Fri, 02/13/2026 - 00:00
SummaryOcean-bottom seismometers (OBSs) are reliable instruments to record ground motions and acoustic signals on the sea floor. Precise timing of the data is essential for most seismological analyses. The internal clocks of the OBSs are not GNSS-controlled, so the clock drift mainly caused by ageing of the quartz crystal and temperature effects must be corrected. As part of the BRAVOSEIS experiment, eight OBSs were deployed in the Antarctic Bransfield Strait for 13 months. All OBSs suffered from a large (-15.3 to 5.4 s) and non-linear (-1.2 to -0.6 s residual to linear drift) clock drift. We used noise cross-correlations to determine the clock drift. The parameters for data pre- and post-processing such as filtering and normalisation had to be selected carefully. Overlapping correlation windows were stacked to derive daily Green’s functions. The time shift between consecutive days was calculated and distributed linearly over the data to obtain a continuous data set without gaps or overlaps. Airgun shots were used to constrain the cumulative clock drift of one station without initial synchronisation. Two onshore stations served as GNSS-controlled reference for four OBSs in the northern part of the Central Bransfield Basin. A different noise regime prevailed in the southern part of the basin; therefore, two already corrected OBSs from the northern part were used as reference stations for the southern OBSs. In this way, the clock drift of all OBSs could be corrected accurately.

A model for the electrical polarization of microbial cells

Geophysical Journal International - Fri, 02/13/2026 - 00:00
SummarySpectral induced polarization (SIP) is a promising technique for detecting microbial activity in porous media, yet its interpretation remains limited by the absence of mechanistic models that account for microbial cell structure. In this study, we present a new semi-analytical model for the electrical polarization of microbial cells that treats both the cell plasma and the surrounding medium as electrolytes, and accounts for the cell membrane as well as the influence of the charged surface structures of the cell. We validate our model through numerical simulations based on the Poisson–Nernst–Planck equations. The model builds upon the membrane capacitance model by Sun and Morgan and integrates surface conductivity effects via the O’Konski model and low-frequency polarization using an adapted Dukhin–Shilov approach. The agreement between the numerical results and our new semi-analytical model is good. The model accounts for three dominant polarization mechanisms: (1) diffuse layer polarization at low frequencies (102–104 Hz), (2) membrane-related capacitive effects at intermediate frequencies (105–107 Hz), and (3) Maxwell-Wagner-type polarization at high frequencies (107–109 Hz). In experimental studies, polarization of bacteria typically appears at frequencies around 0.05 and 20 Hz. As the characteristic frequency of polarization processes usually decreases with increasing polarization length scales, the remaining discrepancy between model and experimental observations suggests that measured signals may be influenced by cell aggregates, biofilms, or metabolic byproducts. Our findings provide a foundation for a mechanistic understanding of microbial polarization and highlight the need for future work to extend the model to conglomerates of microbial cells.

New analysis of crystal deformation in olivine reveals surprising results

Phys.org: Earth science - Thu, 02/12/2026 - 21:35
Minerals form the building blocks of almost everything on Earth. They are made up of crystals—regular, repeating atomic structures that fit together like a three-dimensional pattern. When minerals deform, their normally ordered crystal lattices develop linear imperfections known as dislocations. These are small breaks or shifts in the atomic arrangement that allow crystals to change shape under stress. Some deformed crystals contain large numbers of dislocations, while in others they are sparse and searching for them is like looking for a needle in a haystack.

Global analysis tracks 3,100 glacier surges as climate change rewrites the rules

Phys.org: Earth science - Thu, 02/12/2026 - 19:38
While most of the world's glaciers are retreating as the climate warms, a small but significant population behaves very differently—and the consequences can be severe. A team of international scientists, led by the University of Portsmouth, has carried out a comprehensive global analysis of surging glaciers, examining the hazards they cause and how climate change is fundamentally altering when and where these dramatic events occur.

GEOPHYSICAL CHARACTERIZATION AND CYCLIC ALTERNATION OF THE SEDIMENTOLOGICAL ARCHITECTURAL ELEMENTS OF THE UPPERMOST KUBANG PASU FORMATION IN PERLIS PENINSULAR, MALAYSIA

Publication date: Available online 10 February 2026

Source: Advances in Space Research

Author(s): Khiri Abubakr Khalf, Teoh Ying Jia, Nordiana Mohd Muztaza, Nur Azwin Ismail, Abdulrahman Idris Augie, Abdulrasheed Adamu Hassan, Sirajo Abubakar, Sadiq Bukar Musty

Complexity and scaling descriptors as diagnostic predictors of heliophysical indices across solar-cycle timescales

Publication date: Available online 10 February 2026

Source: Advances in Space Research

Author(s): D. Sierra-Porta, Maximiliano Canedo Verdugo, Daniel David Herrera Acevedo

Stable cropping intensity and dominant human-induced productivity improvement in the trajectory of land use intensification in eastern China

Publication date: Available online 9 February 2026

Source: Advances in Space Research

Author(s): Guoyu Li, Yu Cao, Samantha L. Lima, Hang Chen, Yangfei Huang, Bryan C. Pijanowski

Analysis of EVA gloves vibration reduction mechanism in a zero-gravity, low-pressure environment

Publication date: Available online 9 February 2026

Source: Advances in Space Research

Author(s): Yanpu Mu, Hao Fu, Yizhen Zheng, Yuefeng Li, Xudong Pan

Exploring how the Gulf Stream affects the climate system and the carbon cycle

Phys.org: Earth science - Thu, 02/12/2026 - 18:24
It is well documented that the Gulf Stream plays a pivotal role in the climate system through its transfer of heat, which ultimately supplies warmth to northern latitudes in the North Atlantic. What remains less well understood is how the Gulf Stream influences the climate system by transporting nutrients and carbon. These materials stimulate plankton growth, which in turn plays a vital role in naturally absorbing carbon dioxide from the atmosphere.

Earthquake data provide solid footing for AI foundation science model

Phys.org: Earth science - Thu, 02/12/2026 - 17:02
There's been a seismic shift in science, with scientists developing new AI tools and applying AI to just about any question that can be asked. Researchers are now putting actual seismic waves to work, using data from the world's largest repository of earthquake data to develop "SeisModal," an AI foundation model designed to explore big questions about science. The effort, known as Steel Thread, involves researchers from five national laboratories operated by the U.S. Department of Energy.

Major earthquakes are just as random as smaller ones

Phys.org: Earth science - Thu, 02/12/2026 - 15:00
For obvious reasons, it would be useful to predict when an earthquake is going to occur. It has long been suspected that large quakes in the Himalayas follow a fairly predictable cycle, but nature, as it turns out, is not so accommodating. A new study published in the journal Science Advances shows that massive earthquakes are just as random as small ones. A team of researchers led by Zakaria Ghazoui-Schaus at the British Antarctic Survey reached this conclusion after analyzing sediments from Lake Rara in Western Nepal.

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