AGU 2025 Meeting Notes

The 2025 Annual Meeting of the American Geophysical Union reinforced a clear scientific trajectory: Earth and space science is becoming more quantitative, more integrated, and more operational. Across geodesy, cryosphere science, solid Earth, hydrology, and atmospheric research, the emphasis was less on individual measurements and more on system-level interpretation supported by dense, multi-sensor datasets.

Satellite geodesy remained a foundational pillar of the meeting. GNSS, InSAR, satellite gravimetry, and laser altimetry sessions demonstrated continued improvements in spatial resolution, temporal cadence, and uncertainty modeling. Several studies combined GNSS time series with InSAR deformation maps to improve fault slip inversion and post-seismic relaxation estimates, while others integrated gravimetric mass change with surface deformation to better constrain volcanic and hydrologic processes. The trend is clear: single-technique analyses are being replaced by joint inversions that significantly reduce ambiguity.

Cryosphere research was particularly data-rich this year. Results from satellite altimetry, SAR, and gravimetry were used to quantify ice sheet mass balance, glacier thinning rates, and grounding-line migration with increasing confidence. Multiple presentations focused on reconciling discrepancies between surface elevation change and mass change estimates by explicitly modeling firn compaction and basal melt processes. Importantly, these efforts are narrowing error bars to levels that make the data actionable for sea-level rise projections and regional risk assessments.

Hydrology and terrestrial water storage studies showed similar convergence. GRACE-FO-derived mass anomalies were paired with land surface models, in situ observations, and machine learning approaches to separate groundwater depletion from surface water variability. Several sessions emphasized the growing role of geodetic data in water management, particularly in arid and agriculturally stressed regions, where subsidence and aquifer loss are increasingly intertwined.

A notable technical shift at AGU 2025 was the normalization of cloud-native and AI-enabled workflows. Large-scale geospatial processing, once a bottleneck, is now routine. Researchers presented pipelines that ingest petabyte-scale satellite archives, apply automated feature extraction, and deliver near-real-time analytics. Rather than focusing on algorithm novelty alone, many talks emphasized validation, transferability, and physical interpretability—reflecting a maturation of AI usage in Earth science.

Cross-disciplinary sessions highlighted how Earth system components are being coupled more tightly in models and observations. Examples included linking permafrost thaw to surface deformation, integrating atmospheric reanalysis with ice shelf stability models, and combining seismic noise interferometry with oceanographic data to study cryoseismic signals. These efforts underscore a broader goal: treating the Earth as a coupled, dynamic system rather than a collection of independent domains.

Equally important were discussions around data stewardship and standards. With increasing reliance on commercial Earth observation and heterogeneous data sources, presenters stressed the need for consistent metadata, open uncertainty reporting, and reproducible workflows. This theme ran through geodesy, cryosphere, and hazards sessions alike, reflecting the growing downstream use of AGU science in policy, infrastructure, and finance.

In closing, AGU 2025 was less about breakthrough announcements and more about consolidation and readiness. The science is becoming sharper, the tools more scalable, and the outputs more decision-relevant. The meeting made it clear that Earth and space science is no longer just advancing understanding—it is increasingly shaping how societies measure, model, and manage risk. 

AGU Highlights 2025

Recognizing Excellence: 2025 AGU Geodesy Honors

The AGU Geodesy Section has announced its 2025 awardees, celebrating contributions that connect precision measurement with planetary insight.

• Helen A. Fricker (Scripps Institution of Oceanography) will deliver the William Bowie Lecture, honoring her pioneering work in satellite altimetry and Antarctic ice dynamics.

• Jérôme Benveniste (ESA) earns the Ivan I. Mueller Award for Distinguished Service and Leadership, recognizing his decades of coordination within the altimetry and GGOS communities.

• Wenbin Xu (University of Hong Kong) receives the John Wahr Early Career Award for his innovative integration of InSAR, GNSS, and modeling to study crustal deformation.

• Felix W. Landerer (NASA JPL) is named an AGU Fellow, honoring his leadership in Earth system mass change research.

Together, these honorees represent the bridge between geodesy’s theoretical rigor and its impact on climate, hazards, and resource management.

Looking Ahead: AGU25 in New Orleans

The AGU Annual Meeting 2025 (December 15–19, New Orleans) will spotlight “Science for a Resilient Planet.” The Geodesy Section will feature over 50 sessions on topics such as reference frame modernization, satellite gravimetry, GNSS infrastructure, and the expanding field of chronometric geodesy—using atomic clocks to measure gravity potential.
The GGOS (Global Geodetic Observing System) will also host a dedicated track highlighting how global networks and open data standards are accelerating multi-mission integration. Early-career scientists are particularly encouraged to submit abstracts and compete for the Outstanding Student Presentation Awards (OSPA).

Journal & Research Highlights

Recent AGU journal releases underscore geodesy’s cross-disciplinary reach.

• Geophysical Research Letters featured new results using GRACE-FO data to track water mass loss in Central Asia.

• JGR: Solid Earth published a study on how tectonic strain inferred from GNSS data correlates with fault stress accumulation, offering predictive insights for seismic hazard models.

• In Reviews of Geophysics, a special issue on relativistic geodesy explores how space-based clocks may redefine global height systems by the 2030s.

Community & Collaboration

Beyond the science, AGU continues to expand open access and outreach. Its Bridge Program has connected over 1,000 early-career researchers from underrepresented groups with mentors in Earth and space science. Meanwhile, AGU’s growing partnership with the IPCC ensures that geodetic data increasingly informs climate assessments and policy.

Geodesy News

This month in geodesy has been rich with advances, events, and community movement across reference frames, Earth observation, education, and infrastructure. Here’s a roundup of the most notable stories.

1. IAG Scientific Assembly 2025: “Geodesy for a Changing Environment”

Preparations and programming for the IAG Scientific Assembly, to be held 1–5 September 2025 in Rimini, Italy, have been firmly set. 

 With 300 oral and 388 poster contributions accepted, the conference promises a broad cross-section of geodesy research. 

 New this year: integration of GGOS Days into the assembly program, with dedicated GGOS symposia and a GGOS Governing Board meeting embedded during the event. 

 The theme, “Geodesy for a Changing Environment”, underscores the field’s central role in monitoring climate, sea-level, mass redistribution, and more. 

IAG has also expanded travel funding: in addition to existing support, all early-career scientists (ECS) — including those in high-income countries — are eligible for a special allocation. 

2. Virtual Education & Summer Schools

The 2025 Geodesy Virtual School, held in early June, centered on the terrestrial reference frame and Earth system monitoring, with lectures delivered in both English and Spanish (with subtitles). 

 The program reached a global audience and remains freely accessible via recorded videos. 

Meanwhile, the 11th Nordic Geodetic Commission Summer School, “From Struve to Space,” convened in Tartu, Estonia (Aug 25–29, 2025), bringing 61 participants from 13 countries to blend geodesy history, modern GNSS methods, and machine learning applications. 

 Looking ahead, the 16th SIRGAS School on VLBI and SLR data processing is being planned for October 27–November 1, 2025, in San Juan, Argentina. 

3. Satellite, Clocks & Gravity Innovations

In orbit, the NISAR mission—launched via ISRO’s GSLV in July 2025—has begun its 90-day commissioning phase. 

 As of late summer, the satellite successfully deployed its primary radar reflectors and has started returning first SAR images. 

NISAR’s radar capabilities are expected to make significant contributions to surface change detection, cryosphere monitoring, and geodesy at large scales.

On the precision frontier, researchers are increasingly focusing on chronometric geodesy—using ultra-precise atomic clocks to infer gravitational potential differences. A recent article describes how the ESA’s ACES mission, now installed on the International Space Station, could be leveraged to tighten links between orbiting clocks and ground-based timekeepers, refining elevation and gravity models globally. 

Across theoretical work, a new review on “General Relativity and Geodesy” emphasizes that relativistic corrections are no longer optional: they become essential as measurement precision improves. The authors also explore the promise and challenges of clock-based gravity field recovery from space. 

4. Geodetic Infrastructure Updates

From the ground side, NASA’s GGAO (Goddard Geophysical and Astronomical Observatory) has made progress toward its SGSLR (Satellite Geodesy via Satellite Laser Ranging) station in Ny-Ålesund, Norway. Recently, GGAO acquired and tracked the retro-reflector satellite STARLETTE, marking a milestone ahead of full operational status by late 2025. 

And in the U.S., the National Geodetic Survey (NGS) continues rolling out updated height reference products. Its NAPGD2022 (North American-Pacific Geopotential Datum of 2022) is now in its beta release phase, allowing users to test and provide feedback. 

5. Research Spotlight & Earth Processes

A team from the University of Texas and University of Chile announced discovery of a mechanism by which certain earthquake processes may amplify rupture magnitude—an insight that has implications for geodynamic modeling and hazard assessment. 

Meanwhile, geodesy continues to underline its behind-the-scenes importance. The “Lost Without Geodesy” cartoon, recently published by the Geodesy community, humorously captures how much modern infrastructure—from GNSS to early warning systems—depends on the invisible scaffolding of geodesy. 

Looking Forward

As we move deeper into 2025, the geodesy community has plenty to anticipate: real-world applications from NISAR, lively face-to-face exchanges at IAG2025, further releases of global datum products, and continued maturation of time-based geodetic methods. Stay tuned to GeodesyHub for commentary, deep dives, and community voices on these developments.

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This roundup is based on public announcements, blogs, and recent literature. Please share additional news or feedback you’d like featured in the next edition.

2025 Glacier News

As the world marks 2025 as the International Year of Glaciers’ Preservation, recent events across polar, alpine, and glaciated regions highlight the urgent urgency behind that proclamation. Co‑led by UNESCO and the WMO, the initiative seeks to foster global cooperation, climate resilience, and scientific preservation of ice mass data .

Argentina’s Perito Moreno: A Glacier Under Siege

Once hailed as among the few stable glaciers, Argentina’s iconic Perito Moreno Glacier is now grappling with an accelerated retreat—the most significant in a century. Scientists attribute this surge to detachment from bedrock, driven by decades‑long climatic instability. Using radar, sonar, and satellite technology, researchers documented significant thinning and backward movement, with additional retreat expected in the years ahead .

Hidden Whales and Ancient Echoes

A retreating glacier on Wilczek Island in the Russian Arctic has revealed a surreal sight: an “ancient whale graveyard.” As ice recedes, researchers uncovered remarkably preserved whale skeletons across several square miles. This discovery not only illuminates past marine ecosystems but also mirrors the accelerating pace of glacier melt across the Arctic.

Heard Island: A Canary for Climate Change

On remote subantarctic Heard Island, glaciers covering about 289 sq km have shrunk to roughly 225 sq km since 1947—a nearly 25% decline. Among them, Stephenson Glacier has retreated nearly 6 km, averaging an alarming 178 m per year. Scientists warn this island’s glacial loss serves as a “bellwether of change,” signaling risks to its unique ecosystem and echoing broader polar vulnerability.

Recoveries from the Past: Human Stories and Glacier Melt

In a poignant twist of fate, the remains of Dennis “Tink” Bell, a British meteorologist who vanished into a crevasse in 1959 on King George Island, were finally recovered this month due to glacier retreat. Over 200 personal items accompanied his body, providing closure decades later and underscoring how melting ice reveals deeply human stories frozen in time.

Elsewhere, in Pakistan's Lady Valley, a body long thought lost—disappeared 28 years ago during a snowstorm—emerged preserved in melting glacial ice. The discovery reflects both tragic memory and the accelerating pace of glacial thaw in the Hindu Kush region.

From shrinking giants to unearthing the past, glaciers are speaking—through their retreat, they warn of ecosystem collapse, rising seas, and cultural loss. Whether through reclaimed human stories, newfound fossils, or glacial degradation in remote landscapes, each development adds to a broader narrative: our frozen reservoirs serve as both archives and barometers of climate change.

As the International Year of Glaciers’ Preservation unfolds, the urgency to inventory, study, and preserve these icy sentinels has never been greater. Their stories—from Argentina and Antarctica to the Russian Arctic and Heard Island—are as much about our heritage as they are about our future.

Glacier News Roundup

From the towering ice sheets of Antarctica to the high peaks of the Himalayas, glaciers around the world are sending increasingly urgent signals. New research and satellite data continue to paint a troubling picture of accelerated ice loss, rising sea levels, and changing water systems. Here’s a roundup of the latest news in glacier science—and why it matters for all of us.

1. Antarctica’s Ice Loss Accelerates Again

A 2025 study published in Nature Climate Change reports that Antarctica is now losing ice at a rate of over 300 billion tons per year, with West Antarctica responsible for most of the acceleration. Scientists from the British Antarctic Survey and NASA have tracked retreating grounding lines and thinning shelves at record levels, especially around Thwaites and Pine Island glaciers. Worryingly, the loss appears to be outpacing previous worst-case models, suggesting global sea-level projections may need urgent revision.

2. Greenland Melting Events Becoming Routine

This past spring, Greenland experienced its third major melt event in just five years, with surface temperatures climbing 20°C above normal in parts of the ice sheet. The melt covered more than 60% of the ice sheet’s surface, releasing massive amounts of freshwater into the North Atlantic. Researchers warn that such events—once rare—are becoming the new normal, with implications for sea-level rise and Atlantic Ocean circulation patterns.

3. New Glacial Lakes in the Himalayas Pose Flood Risks

A report from ICIMOD (International Centre for Integrated Mountain Development) reveals the formation of over 200 new glacial lakes across the Himalayas in the last two decades. Many are unstable and pose a growing risk of glacial lake outburst floods (GLOFs). These events can be catastrophic for downstream communities in Nepal, Bhutan, and northern India. The report calls for immediate investment in early warning systems and infrastructure planning.

4. Breakthrough in Glacier Bed Mapping

Not all glacier news is grim—scientists recently made a breakthrough in mapping subglacial topography using AI and satellite data fusion. The new method, developed by a team from ETH Zurich, significantly improves our ability to predict glacier collapse by modeling how ice moves across different terrains. This could sharpen forecasts for sea-level rise and glacial retreat, offering better tools for policymakers.

Why It All Matters

Glacier news is no longer just for scientists. The state of the world’s glaciers affects everyone—from coastal cities facing sea-level rise to farmers depending on glacier-fed rivers. As the data keeps coming in, one message is clear: glaciers are changing fast, and our response needs to be just as swift.

AGU24 Meeting Predictions

The AGU24 Annual Meeting, scheduled for December 9–13, 2024, in Washington, D.C., is the premier gathering for Earth and space scientists worldwide. This year's theme, "What’s Next for Science," emphasizes the continuous journey of scientific discovery and exploration. 

Glaciology is a significant focus at AGU24, with numerous sessions dedicated to the latest research on glaciers and ice sheets. These sessions cover a range of topics, including glacier dynamics, ice-sheet stability, and the impacts of climate change on glacial environments. Researchers will present findings from various regions, such as Antarctica, Greenland, and alpine glaciers, providing insights into current trends and future projections.

The conference schedule includes oral presentations, poster sessions, and eLightning sessions that facilitate in-depth discussions on glaciological studies. Attendees have the opportunity to engage with experts, participate in town halls, and attend plenary sessions that address broader themes related to cryospheric sciences. 

For detailed information on specific glaciology sessions, including dates, times, and topics, please refer to the AGU24 scientific program and schedule. This resource provides comprehensive details on all sessions, allowing attendees to plan their participation effectively. 

AGU24 serves as a vital platform for advancing glaciological research, fostering collaboration, and addressing the challenges posed by a changing climate on glacial systems. 

Pioneers of Glacier Research

Glaciers have long captured the imagination of scientists and explorers alike, drawing interest for their mysterious, icy landscapes and their role in shaping the Earth’s surface. The study of glaciers, known as glaciology, has roots in the work of early naturalists and explorers who ventured into the frozen frontiers to observe and document these massive ice formations. Some of the first pioneers in glacier research paved the way for our modern understanding of these fascinating natural features.

Early Explorers and Observers: One of the earliest explorers known for his contributions to glacier research was Horace-Bénédict de Saussure, an 18th-century Swiss geologist and physicist. In the 1760s, Saussure explored the glaciers of the Swiss Alps, particularly around Mont Blanc. He made detailed observations of glacial movement, noting how glaciers could shape the landscape. Saussure's work was instrumental in establishing the scientific study of glaciers, as he proposed that glaciers were not stationary but instead flowed over time, reshaping the terrain.

Another key figure was Ignaz Venetz, a Swiss engineer and naturalist in the early 19th century. Venetz proposed the idea that glaciers had once been far more extensive, covering much of Europe during past ice ages. His theory, presented in 1821, was initially met with skepticism but later gained widespread acceptance, especially after it was supported by his colleague Jean de Charpentier, who further popularized the idea of glaciation.

Louis Agassiz: The Father of Modern Glaciology: Perhaps the most famous early glaciologist was Louis Agassiz, a Swiss scientist and one of the founding figures of modern glaciology. In the 1830s and 1840s, Agassiz conducted detailed studies of glaciers in the Swiss Alps, using tools to measure glacial movement and volume. He is best known for his theory of a global ice age, proposing that glaciers had once covered vast areas of the Earth. Agassiz's groundbreaking work, particularly his book "Études sur les glaciers" (Studies on Glaciers), published in 1840, helped to establish the field of glaciology and transform our understanding of the Earth's climate history.

Legacy of Early Glacier Research: These early explorers and scientists laid the groundwork for what would become a critical field of study. Their observations of glacier movement, structure, and effects on the landscape provided the basis for understanding not only how glaciers shape the Earth but also their role in past and future climate changes. Today, modern glaciologists use advanced technology, including satellite imagery and ice-penetrating radar, to continue exploring and understanding glaciers, building on the legacy of these pioneering figures.

Recent Advancements in Geodesy

The world of geodesy continues to evolve rapidly, driven by advancements in technology, research, and collaborations across global institutions. In October 2024, several key events and developments captured the attention of the geodesy community. Below is a roundup of the latest updates in the field:

1. Earth Observation Satellite Launches

This month marked the launch of several Earth observation satellites to improve our understanding of the Earth's surface, ocean levels, and atmospheric patterns. Notably, the Sentinel-7 satellite, launched by the European Space Agency (ESA), is designed to monitor land deformation and coastal changes, offering crucial data for disaster management and climate change research. These satellites are paving the way for more accurate global models.

2. Advances in GNSS and Multi-Constellation Systems

Global Navigation Satellite Systems (GNSS) are continuously improving in precision. In recent weeks, significant updates to multi-constellation GNSS platforms have been made. The European Union's Galileo program introduced new signal upgrades, enhancing its positioning accuracy to sub-centimeter levels in certain conditions. These improvements are critical for real-time monitoring applications, from seismic activity to urban infrastructure.

3. UN-GGIM Annual Meeting

The United Nations Committee of Experts on Global Geospatial Information Management (UN-GGIM) held its 14th annual meeting, discussing the role of geodesy in achieving the UN's Sustainable Development Goals (SDGs). Key sessions focused on how accurate geospatial data can aid disaster preparedness, infrastructure development, and environmental sustainability. This event underscored the importance of geodesy in global decision-making processes.

4. Seafloor Mapping Initiatives

Efforts to map the ocean floor have gained momentum with collaborative international projects like The Nippon Foundation-GEBCO Seabed 2030 Project, which aims to map the entire seafloor by 2030. Recent milestones include new high-resolution maps of the Arctic seabed, offering insights into tectonic plate boundaries and potential resource deposits. These discoveries are essential for understanding Earth’s undersea geodynamics and mitigating natural hazards.

5. Upcoming Conferences and Workshops

Several upcoming conferences are set to drive further collaboration and knowledge sharing within the geodesy community. The American Geophysical Union (AGU) Fall Meeting, scheduled for December 2024, will feature sessions on geodetic techniques, satellite geodesy, and advances in crustal deformation monitoring. If you’re interested in attending, now is the time to register and prepare to engage with experts from around the globe.

Geodesy continues to be at the forefront of scientific research, offering insights into critical global challenges such as climate change, natural disasters, and sustainable development. Stay tuned as these events unfold, and follow along as new technologies and collaborations shape the future of Earth observation and geospatial data.

Glacial Predictions for 2035

Predicting glacial activity over the next decade involves examining current trends in climate science and modeling future scenarios. Here are some key predictions and considerations:

1. Accelerated Melting: Glaciers around the world are expected to continue melting at an accelerated pace due to rising global temperatures. This includes significant ice loss from major glaciers in Greenland, Antarctica, and Alaska. The Thwaites Glacier in Antarctica, often called the "Doomsday Glacier," is particularly concerning due to its potential to raise sea levels by several feet if it collapses entirely​ (Phys.org)​​ (DOGO News).

2. Sea Level Rise: The continued melting of glaciers and ice sheets is predicted to contribute to global sea level rise. Estimates suggest that by 2030, sea levels could rise by about 0.3 to 0.5 meters (approximately 1 to 1.5 feet), which will have profound impacts on coastal communities worldwide​ (DOGO News).

3. Increased Glacial Retreat: Glacial retreat will likely continue, especially in regions like the Himalayas, Andes, and the Alps. This retreat is expected to disrupt local water supplies, as many communities rely on glacial meltwater for drinking and irrigation​ (ScienceDaily).

4. Impact on Ecosystems: The loss of glaciers will have cascading effects on ecosystems. In regions where glaciers provide a critical water source, the loss of glacial meltwater could lead to reduced river flows, affecting both human and wildlife populations. For instance, the loss of glacial ice in the Andes could impact agriculture and hydroelectric power generation​ (Phys.org).

5. Increased Monitoring and Research: Advances in satellite technology and remote sensing will improve the monitoring of glaciers. This enhanced monitoring will provide better data to predict and manage the impacts of glacial melt. Organizations like NASA, ESA, and various research institutions are expected to play key roles in this effort​ (DOGO News).

6. Policy and Mitigation Efforts: Global policy efforts to mitigate climate change could influence the rate of glacial melt. International agreements and national policies aimed at reducing greenhouse gas emissions will be crucial in managing future glacial activity. The success of these efforts will determine the extent of future glacial melt and its impacts on global sea levels and ecosystems​ (Phys.org)​​ (ScienceDaily)​.

In summary, the next decade is likely to see continued and accelerated glacial melt with significant implications for sea level rise, ecosystems, and human societies. Ongoing research and monitoring, combined with effective climate policies, will be critical in managing these changes and mitigating their impacts.

2024 Glacier News

Thwaites Glacier Melting Faster: Recent studies have shown that the Thwaites Glacier in West Antarctica is melting faster than previously thought. The glacier, often referred to as the "Doomsday Glacier," is being affected by warm seawater seeping underneath it, which accelerates its erosion. This could lead to a significant rise in sea levels much sooner than earlier predictions indicated​ (Phys.org)​​ (DOGO News).

Alaskan Glacier Accelerated Melting: Research has indicated that glaciers in Alaska are melting at an accelerated rate and could reach an irreversible tipping point. This finding underscores the rapid pace of climate change and its impact on glacial regions​ (ScienceDaily).

Glacier Inventory in the Conterminous USA: A new inventory of glaciers and perennial snowfields in the contiguous United States has revealed that these glaciers are becoming smaller and some are disappearing altogether. This comprehensive study provides critical data on the volume changes and ice loss from these glaciers, highlighting the ongoing impact of climate change​ (Phys.org)​.

Greenland's Jakobshavn Glacier: Studies on Greenland's Jakobshavn Glacier have shown it lost an estimated 88 billion metric tonnes of ice between 1985 and 2022. The glacier's melt contributes significantly to global sea level rise and serves as a stark indicator of the changing climate​ (ScienceDaily).

Impact of Glacier Melt on Local Ecosystems: In Peru, researchers have observed how llamas have helped stabilize landscapes left barren by melting glaciers. This highlights the broader ecological impacts of glacier retreat and the resilience of certain ecosystems in adapting to these changes​ (Phys.org).

These stories reflect the ongoing and accelerating impact of climate change on glaciers worldwide, with significant implications for global sea levels and local ecosystems. For more detailed information, you can check out the sources from ScienceDaily, Phys.org, and DogoNews.