Guido Grosse

📢 Call for Papers | Special Issue in Remote Sensing of Environment

We are excited to announce a forthcoming special issue in Remote Sensing of Environment focused on the rapidly evolving area of Geospatial Foundation Models and their transformative potential for environmental remote sensing.

Introducing the new chief editors of the cryo blog New year, new team! We have some changes in our editorial team and would like to introduce our new chief editors to you today – please say hi to Mack and Leah! Mack and Leah will be taking over the ro...

New year - new team!
Today we would like to introduce you to the new chief editor team of our #cryoblog: please say hi to Mack and Leah! 🥳❄️

@mack-baysinger.bsky.social @leahsmuhle.bsky.social

We would also like to say thanks to our outgoing chief-editor team! 💙

blogs.egu.eu/divisions/cr...

AWI researchers have reorganized the Global Terrestrial Network for Permafrost (GTN-P) database and made it publicly accessible. Since the 1990s, the GTN-P has collected high-quality data to monitor global permafrost changes and its role in the climate system.

www.gtn-p.org

In 2025, the AWI and University of Bremen secured extensive data sets from the USA. Now, the @dfg.de has approved around €860,000 in funding to systematically identify endangered data and secure it for the long term with the help of the PANGAEA data platform. ☁️📊

www.awi.de/en/about-us/...

Introducing the Maxar Open Data Plugin for QGIS 🚀

The Maxar Open Data Program provides free high-resolution satellite imagery to support global disaster response and recovery. To date, it has released around 150,000 images totaling ~14 TB, all freely accessible through the AWS Open Data Program.

PhD position with focus on modelling of ground ice formation and rapid thaw processes in permafrost landscapes now open in our PeTCaT project. The position is at VU Amsterdam: workingat.vu.nl/vacancies/ph...

🎁 A New Year’s gift to the geospatial community: a brand-new QGIS plugin that unlocks access to 80+ petabytes of satellite imagery and geospatial datasets with zero coding required.

Paleoclimatologist Jessica Tierney recently published a global temperature record covering almost the past half-billion years. According to her model, 50 million years ago, inland temperatures approached 122 degrees Fahrenheit. www.quantamagazine.org/climate-extr...

New report finds the Arctic continues to warm faster than the planet as a whole This year's Arctic Report Card from the National Oceanic and Atmospheric Administration finds that the northernmost part of the Earth is warming faster than the global average, leading to melting glac...

As long correctly predicted by global #climate models...

"New report finds the Arctic continues to warm faster than the planet as a whole"

www.npr.org/2025/12/16/n...

From record warming to rusting rivers, 2025 Arctic Report Card shows a region transforming faster than expected The 20th anniversary of the annual report tracks how sea ice, snow cover and many other vital signs of the Arctic have changed, and the impact that’s having on people and wildlife.

We’ve got a piece in The Conversation about the 2025 Arctic Report Card and the implications of 20 years of tracking rapid Arctic change. #Arctic #akwx #Climate

theconversation.com/from-record-...

Alaska Native villages have few options and little US help as climate change devours their land Storms that battered Alaska’s western coast this fall have brought renewed attention to low-lying Indigenous villages left increasingly vulnerable by climate change.

Storms that battered Alaska’s western coast this fall have brought renewed attention to low-lying Indigenous villages left increasingly vulnerable by climate change.

High-resolution inventory and classification of retrogressive thaw slumps in West Siberia Abstract. Permafrost thaw disrupts ecosystems, hydrology, and biogeochemical cycles, reinforcing climate change through a positive permafrost-carbon feedback loop. Thaw can be gradual, deepening the a...

Nina published her new inventory of retrogressive thaw slumps in West Siberia, covering the Yamal, Gydan, and Tazovsky peninsulas. Thaw slumps evolve by rapidly melting ground ice in very ice-rich permafrost. The dataset is based on high-res sat data and manual verification. doi.org/10.5194/essd...

Klimawandel: Und plötzlich war kein See mehr da In Alaska verschwindet binnen Stunden ein See. Der Grund: tauender Permafrost. Forscher wollen nun wissen, wann das System kippen könnte und ganze Landschaften verändern.

Die @zeit.de hat über einen See in Alaska berichtet, der aufgrund der Degradation von #Permafrost ausgelaufen ist und über damit zusammenhängende Forschung des @awi.de sowie Kooperationspartnern (Geschenk-Link): www.zeit.de/2025/44/klim....

Typhoon leaves flooded Alaska villages facing a storm recovery far tougher than most Americans will ever experience ‘As the storm approached Alaska, everything went sideways,’ leaving people no time to evacuate and little time to prepare. An Alaska meteorologist explains what happened and the challenges ahead.

I’ve got a short piece up in The Conversation on the catastrophic flooding in Southwest Alaska from ex-typhoon Halong and the challenges of recovery work. #akwx #ExtremeWeather #Alaska #AlaskaSky

theconversation.com/typhoon-leav...

Sea-level driven isolation of glacial plant refugia revealed by submerged lake sediment from the Bering Land Bridge and St. Matthew Island Bering Land Bridge (BLB) climate and vegetation during the Last Glacial Maximum (LGM) remains largely understudied, given challenges associated with collecting records from the submerged BLB. Previ...

There aren't very many proxies of past sea level during the Last Glacial Maximum (27,000-19,000 ybp). Jones et al present a sediment core from Beringia that transitioned from being a lake to being submerged by the ocean during the early parts of the deglaciation. www.tandfonline.com/doi/abs/10.1...

Nice study with a large database of driftwood samples 👍. Carl will be venturing into various aspects of recent Arctic driftwood dynamics with remote sensing and AI over the next few years.

Thanks - yes, Carl is working on this.

The many uses of #driftwood: the first large-scale mapping of Arctic coastlines. #AWI Press release for Carl‘s paper using AI to map driftwood abundance along the North American arctic coast with Planet satellite imagery. www.awi.de/en/about-us/...

Water level in northwest Alaska available through AOOS data dashboard. #AlaskaSky #akwx #ExtremeWeather

Unser neues #permafrost Projekt PeTCaT @awi.de ist offiziell gestartet: Wir werden in den kommenden 5 Jahren mit einem großartigen internationalen Team zum schnellen Permafrosttauen forschen und einige der wichtigsten Fragen zum Permafrost-Kohlenstoff-Feedback beantworten: www.awi.de/ueber-uns/se...

Retrogressive thaw slump in NW Canada

Thermokarst lake in NE Canada

The #PeTCaT team includes researchers from UAF, UofA, UHH, VUA, SU, WARC, ARI, and NTGS with expertise in permafrost, soil carbon, carbon fluxes, greenhouse gases, limnology, ground ice, plant-soil interactions, spatial analysis, remote sensing, deep learning, and process and Earth system modelling.

I am happy to announce that we received major funding from Schmidt Sciences under their VICC program to study rapid #Permafrost Thaw Carbon Trajectories (PeTCaT). The 5-year project led by my team @awi.de partners with an international team to quantify how rapid thaw contributes to climate change.

UAF people and Fairbanks residents:

(PDF) Preliminary ground ice modelling of the Mackenzie Valley and Delta regions, Northwest Territories, Canada PDF | New regional-scale ground ice modelling for the Mackenzie Valley and Delta regions, based on surficial geology aligned with the Geological Survey... | Find, read and cite all the research you ne...

Our latest ground ice mapping. This time improved maps of the Mackenzie Valley and Delta regions, both areas with significant existing and proposed infrastructure. Behind the scenes we are modelling away in other areas toward Ground Ice Map of Canada V2 1/ www.researchgate.net/publication/...

Even subzero parts of the Arctic are thawing. Ancient salt is the culprit Long-buried layers of saline permafrost seem to be accelerating climate change's transformation of the Arctic

Long-buried layers of saline permafrost seem to be accelerating climate change’s transformation of the Arctic. https://scim.ag/46AxH2E

Large driftwood accumulations along arctic coastlines and rivers - Scientific Reports Scientific Reports - Large driftwood accumulations along arctic coastlines and rivers

Our new study led by Carl Stadie is using #deeplearning U-Net methods to train on aerial imagery and then analyzed ~32,000 high-res #PlanetScope images across 1.3 million sqkm of the North American Arctic #coastline, mapping close to 20,000 #driftwood deposits. @awi.de www.nature.com/articles/s41...

Wild, scenic, and toxic: Recent degradation of an iconic Arctic watershed with permafrost thaw | PNAS The streams of Alaska’s Brooks Range lie within a vast (~14M ha) tract of protected wilderness and have long supported both resident and anadromous...

A new PNAS study links #permafrost thaw and water toxicity levels from metal concentrations. This is bad news for Arctic rivers, their ecosystems, and food chains: www.pnas.org/doi/full/10..... Salmon River in NW Alaska, once praised for its pristine waters, has turned toxic to aquatic life.

Using Texture‐Based Image Segmentation and Machine Learning With High‐Resolution Satellite Imagery to Assess Permafrost Degradation Landforms in the Russian High Arctic Image segmentation enables landscape-scale mapping of permafrost degradation stages based on their texture in panchromatic imagery Convolutional Neural Networks outperform feature-based Random Fo...

New @awi.de study by Inauen et al developed a machine learning method to map landscape-scale #permafrost thaw such as baydzherakh development and thermo-erosion gully change in North Siberia with panchromatic historical Hexagon spy imagery and modern panchromatic sat imagery. doi.org/10.1029/2024...

The NSF-funded Arctic Research Consortium of the United States (ARCUS) will shut down at the end of Sept. ARCUS has been around since the late 80s; in recent years their staff had dwindled, and NSF said earlier this year that their grant would not be renewed. Another blow to polar science.

Thawing permafrost raised carbon dioxide levels after the last ice age, study shows Carbon dioxide levels in the atmosphere vary naturally between ice ages and interglacial periods. A new study by researchers at the University of Gothenburg shows that an unexpectedly large proportion...

Study by researchers at the University of Gothenburg shows that almost half of the rising carbon dioxide emissions after the ice age may have come from thawing permafrost.

phys.org/news/2025-08...