Articles | Volume 12, issue 20
https://doi.org/10.5194/bg-12-5941-2015
https://doi.org/10.5194/bg-12-5941-2015
Research article
 | 
19 Oct 2015
Research article |  | 19 Oct 2015

Thermal processes of thermokarst lakes in the continuous permafrost zone of northern Siberia – observations and modeling (Lena River Delta, Siberia)

J. Boike, C. Georgi, G. Kirilin, S. Muster, K. Abramova, I. Fedorova, A. Chetverova, M. Grigoriev, N. Bornemann, and M. Langer

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Cited articles

Abnizova, A., Siemens, J., Langer, M., and Boike, J.: Small ponds with major impact: The relevance of ponds and lakes in permafrost landscapes to carbon dioxide emissions, Global Biogeochem. Cy., 26, GB2041, https://doi.org/10.1029/2011gb004237, 2012.
Alekseevsky, N. I. (Ed.): Geoecological state of Russian Arctic coast and their safety of nature management, GEOS Publ., Moscow, Russia, 586 pp., 2007 (in Russian).
Alerstam, T., Gudmundsson, G. A., Green, M., and Hedenström, A.: Migration along orthodromic sun compass routes by arctic birds, Science, 291, 300–303, 2001.
Are F. E.: Thermal regime of small thermokarst lakes in the Siberian Taiga zone (for example of Central Yakutia), Collection of papers "Lakes of Cryolithozone of Siberia", edited by: Are F. E., Nauka, Siberian brunch, 98–116, 1974 (in Russian).
Arp, C. D., Jones, B. M., Whitman, M., Larsen, A., and Urban, F. E.: Lake Temperature and Ice Cover Regimes in the Alaskan Subarctic and Arctic: Integrated Monitoring, Remote Sensing, and Modeling, J. Am. Water Resour. Ass., 46, 777–791, https://doi.org/10.1111/j.1752-1688.2010.00451.x, 2010.
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Short summary
We show that lakes in northern Siberia are very efficient with respect to energy absorption and mixing using measurements as well as numerical modeling. We show that (i) the lakes receive substantial energy for warming from net short-wave radiation; (ii) convective mixing occurs beneath the ice cover, follow beneath the ice cover, following ice break-up, summer, and fall (iii) modeling suggests that the annual mean net heat flux across the bottom sediment boundary is approximately zero.
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