[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC42] Permafrost in transition: causes, impacts and feedbacks

Tue. May 26, 2026 9:00 AM - 10:30 AM 201B (International Conference Hall, Makuhari Messe)

Chairperson:Liu Lin(Chinese University of Hong Kong), Furuya Masato(Department of Earth and Planetary Sciences Hokkaido University), Iwahana Go(University of Alaska Fairbanks), Yi Yonghong(Tongji University)

Permafrost, a cornerstone of the cryosphere, is undergoing rapid and unprecedented changes, which poses great challenges on regional water supply, ecosystem health and infrastructure stability. This session delves into the multifaceted dynamics of this transition, exploring the interconnected processes that drive such changes, consequences, and critical feedbacks to climate system and our society. We invite contributions that investigate the causes of permafrost degradation, from atmospheric warming, changing snow cover to extreme events including wildfire and extreme rainfall events, and their impacts on ground thermal regime. We also seek studies on the diverse impacts of permafrost thaw, including geomorphic and hydrological changes, infrastructure damage, and transformations in Arctic and Alpine ecosystems. Interdisciplinary studies that integrate in-situ monitoring, modeling and remote sensing to advance our ability of characterizing above processes across spatial and temporal scales and feedbacks are particularly encouraged. The ultimate goal is to form a holistic view of the future fate of permafrost and its role in a warming world.

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9:00 AM - 9:15 AM

[ACC42-01] InSAR-Detected Permafrost Aggradation in a Wildfire-Affected Drained Lake in the Northwest Territories, Canada

*Zetao Cao¹, Masato Furuya^2,3 (1. Graduate School of Science, Hokkaido University, 2. Faculty of Science, Hokkaido University, 3. Arctic Research Center, Hokkaido University)

9:15 AM - 9:30 AM

[ACC42-02] Spatial variations of thaw depth, surface displacement and vegetation in the Poker Flat Researh Range, interior Alaska

*Takahiro Abe¹, Go Iwahana^2,3, Gaku Amada⁴, Shunji Kanie⁵, Kazuyuki Saito⁶, Yoshihiro Iijima⁷ (1. Field Science Education and Research Center, Kyoto University , 2. International Arctic Research Center, University of Alaska Fairbanks, 3. Arctic Research Center, Hokkaido University, 4. Forestry and Forest Products Research Institute, 5. Faculty of Engineering Department of Civil and Environmental Engineering, Hokkaido University of Science, 6. Japan Agency of Marine-Earth Science and Technology, 7. Graduate School of Urban Enviornmental Studies, Tokyo Metropolitan University)

9:30 AM - 9:45 AM

[ACC42-03] Present and Future Mountain Permafrost Distribution in Japan Derived from a Land Surface Model and Observations: Impacts of Soil Physical Properties

*Tokuta Yokohata¹, Go Iwahana², Kazuyuki Saito³, Tetsuo Sueyoshi⁴, Takashi Arakawa⁵, Tomoko Nitta⁶, Yukihiko Onuma⁹, Irina Melnikova¹, Yasuto Watanabe¹, Noriko N Ishizaki¹, Haruto Okubo⁷, Yuka Sawa⁷, Shiona Nagane⁷, Kumiko TAKATA⁸ (1. National Institute for Environmental Studies, 2. University of Alaska Fairbanks, 3. Japan Agency for Marine and Earth Science and Technology, 4. National Institute for Polar Research, 5. CliMTech, 6. Chuo University, 7. Tsukuba University, 8. Azabu University, 9. Meteorological Research Institute)

9:45 AM - 10:00 AM

[ACC42-04] Evaluating the Capability of InSAR-Derived Surface Deformation to Characterize the Spatio-temporal variability of Active Layer Thickness Dynamics

*Qianhui Liu¹, Yonghong Yi¹ (1. Tongji University)

10:00 AM - 10:15 AM

[ACC42-05] Holocene evolution of permafrost-dominated nearshore environment and carbon source variability in Tuktoyaktuk Harbor, Canadian Beaufort Sea

*Blanda Anita Matzenbacher^1,2, Tommaso Tesi³, Petra Zahajska⁴, Bennet Juhls⁵, Michael Fritz⁵, Lisa Bröder⁶, Malin Kylander^1,2, Peter D. Heintzman^1,2, Julie Lattaud^1,2, Katharina Schwarzkopf^1,2, Inda Brinkmann^1,2, Pier Paul Overduin⁵, Dustin Whalen⁷, Matthew O'Regan^1,2 (1. Stockholm Univ., 2. Bolin Center, 3. CNR-ISP, 4. Univ. of Bern, 5. AWI, 6. ETH Zurich, 7. NRCan)

Discussion (10:15 AM - 10:30 AM)

Session information