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Permafrost Thaw AG

(Samoylov Island, Lena River Delta - image: Simon Zwieback)

Chairs

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Julia Boike
AWI
Germany
Contact

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Sarah Chadburn
University of Exeter
​United Kingdom
Contact

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Simon Zwieback
University of Alaska
​U.S.A.
Contact

Scope

Northern landscapes and infrastructure are threatened by degrading permafrost. Areas underlain by ice-rich ground are particularly prone to terrain instability in the form of collapse and slumping.  Current Earth System Model projections, however, do not account for thaw-induced terrain changes and associated subgrid processes. They thus cannot represent the impacts on and feedbacks with ecosystem functioning, hydrology and carbon turnover. 
​
Towards our goal of predicting permafrost thaw dynamics, we will use targeted data collection that can feed into models  to test the following hypothesis:

The speed and intensity of landscape-scale permafrost thaw are underestimated when abrupt thaw processes (with focus on subgrid-scale processes of subsidence, altered drainage and ecosystem responses) are not explicitly modelled. 

The permafrost thaw action group will guide community-driven data acquisition and synthesis efforts across circum-Arctic gradients in permafrost and climate conditions. We strive to generate high-quality records of key variables such as snow depth and ground ice contents. The development and sharing of field and data protocols is central to our strategy.
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Mackenzie Delta Uplands (image: Simon Zwieback)
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​​Samoylov observatory, Lena River Delta (image: Peter Schreiber, 2018)

Potential Activities

Under construction

Members (updated regularly)

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lva Sjöberg
Permafrost hydrology
Denmark/Greenland
Contact

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Hanna Lee
Earth System Modeling
Norway
Contact

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Julia Martin
Snow physical properties
Germany
Contact

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Steve Kokelj
Thermokarst
Canada
Contact

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Under construction

IASC

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