Past and present thermokarst lake dynamics in the Yedoma Ice Complex region of North-Eastern Yakutia


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averemeeva [ at ] gmail.com

Abstract

Thermokarst lakes are typical components of the yedoma-alas dominated relief in the coastal lowlands of North- Eastern Yakutia and formed as a result of thawing Late Pleistocene ice-rich Yedoma Ice Complex (IC) deposits. The aim of our study is to estimate thermokarst lake area changes from the early Holocene onwards based on RS data. The decrease of thermokarst lake area from the early Holocene, taking into account total alas depression areas, is as much as 81-83 %. Modern climate warming has led to a general trend of thermokarst lake area decrease. Lake drainage occurs mostly on elevated sites with high Yedoma IC fraction while lake area increase is typical for low-lying areas with a small Yedoma IC fraction. The area increase of thermokarst ponds on flat, boggy yedoma surfaces indicates ice wedge degradation in response to rising summer air temperatures and precipitation.



Item Type
Conference (Talk)
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Not peer-reviewed
Publication Status
Published
Event Details
5th European Conference on Permafrost, Book of Abstracts, 23 Jun 2018 - 01 Jul 2018, Chamonix Mont-Blanc, France.
Eprint ID
47579
Cite as
Veremeeva, A. , Günther, F. , Nitze, I. , Grosse, G. , Glushkova, N. and Rivkina, E. (2018): Past and present thermokarst lake dynamics in the Yedoma Ice Complex region of North-Eastern Yakutia / P. Deline , X. Bodin and L. Ravanel (editors) , 5th European Conference on Permafrost, Book of Abstracts, Chamonix Mont-Blanc, France, 23 June 2018 - 1 July 2018 .


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info:eu-repo/grantAgreement/EC/FP7/338335


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