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Permafrost and Surface Energy Balance of a Polygonal Tundra Site in Northern Siberia – Part 1: Spring to Fall : Volume 4, Issue 3 (12/07/2010)

By Langer, M.

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Book Id: WPLBN0003991471
Format Type: PDF Article :
File Size: Pages 47
Reproduction Date: 2015

Title: Permafrost and Surface Energy Balance of a Polygonal Tundra Site in Northern Siberia – Part 1: Spring to Fall : Volume 4, Issue 3 (12/07/2010)  
Author: Langer, M.
Volume: Vol. 4, Issue 3
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Westermann, S., Muster, S., Piel, K., Langer, M., & Boike, J. (2010). Permafrost and Surface Energy Balance of a Polygonal Tundra Site in Northern Siberia – Part 1: Spring to Fall : Volume 4, Issue 3 (12/07/2010). Retrieved from

Description: Alfred-Wegener-Institute for Polar and Marine Research, Telegrafenberg A43, 14473 Potsdam, Germany. Permafrost thawing is essentially determined by the surface energy balance, which potentially triggers the activation of a massive carbon source, if previously frozen organic soils are exposed to microbial decomposition. In this article, we present the first part of a comprehensive annual surface energy balance study performed at a polygonal tundra landscape in northeast Siberia, realized between spring 2007 and winter 2009. This part of the study focuses on the half year period from April to September 2007–2008, during which the surface energy balance is obtained from independent measurements of the radiation budget, the turbulent heat fluxes and the ground heat flux at several sites. The short-wave radiation is the dominant factor in the surface energy balance during the entire observation period. About 50% of the available net radiation is consumed by latent heat flux, while the sensible and the ground heat flux are both on the order of 20 to 30%. The ground heat flux is mainly consumed by active layer thawing, where 60% of soil energy storage are attributed to. The remainder is used for soil warming down to a depth of 15 m. The controlling factors for the surface energy partitioning are in particular the snow cover, the cloud cover and the soil temperature gradient. Significant surface temperature differences of the heterogeneous landscape indicate spatial variabilities of sensible and latent heat fluxes, which are verified by measurements at different locations. However, differences in the partition between sensible and latent heat flux for the different sites only exist during conditions of high radiative forcing, which only occur occasionally.

Permafrost and surface energy balance of a polygonal tundra site in northern Siberia – Part 1: Spring to fall

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