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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
Historic
Publication Date:
2010
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 http://nook-library.net/


Description
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.

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

Excerpt
Are, F. and Reimnitz, E.: An overview of the Lena River Delta setting: geology, tectonics, geomorphology, and hydrology, J. Coast. Res., 16, 1083–1093, 2000.; Boike, J., Roth, K., and Overduin, P.: Thermal and hydrologic dynamics of the active layer at a continuous permafrost site (Taymyr Peninsula, Siberia), Water Resour. Res., 34, 355–363, 1998.; Boike, J., Roth, K., and Ippisch, O.: Seasonal snow cover on frozen ground: Energy balance calculations of a permafrost site near Ny-Alesund, Spitsbergen, J. Geophys. Res.-Atmos., 108, 8163–8173, 2003.; Boike, J., Wille, C., and Abnizova, A.: Climatology and summer energy and water balance of polygonal tundra in the Lena River Delta, Siberia, J. Geophys. Res.-Biogeo., 113, G03025, doi:10.1029/2007JG000540, 2008.; Brotzge, J. and Duchon, C.: A field comparison among a domeless net radiometer, two four-component net radiometers, and a domed net radiometer, J. Atmos. Ocean. Tech., 17, 12, 1569–1582, 2000.; Brown, J., Ferrians Jr., O., Heginbottom, J., and Melnikov, E.: Circum-Arctic map of permafrost and ground-ice conditions, US Geological Survey Circum-Pacific Map, 1997.; Callaghan, T., Bj{ö}rn, L., Chernov, Y., Chapin, T., Christensen, T., Huntley, B., Ims, R., Johansson, M., Jolly, D., Jonasson, S., et al.: Effects of changes in climate on landscape and regional processes, and feedbacks to the climate system, AMBIO, 33, 459–468, 2004.; Christensen, T. and Cox, P.: Response of methane emission from Arctic tundra to climatic change: Results from a model simulation, Tellus B, 47, 301–309, 1995.; Christensen, T., Ekberg, A., Str{ö}m, L., Mastepanov, M., Panikov, N., Ö}quist, M., Svensson, B., Nyk{ä}nen, H., Martikainen, P., and Oskarsson, H.: {Factors controlling large scale variations in methane emissions from wetlands, Geophys. Res. Lett., 30, 1414, doi:10.1029/2002GL016848, 2003.; Comiso, J.: Arctic warming signals from satellite observations, Weather, 61, 2006.; Høgstrøm, U.: Non-dimensional wind and temperature profiles in the atmospheric surface layer: A re-evaluation, Bound.-Lay. Meteorol., 42, 55–78, 1988.; Cox, P., Betts, R., Bunton, C., Essery, R., Rowntree, P., and Smith, J.: The impact of new land surface physics on the GCM simulation of climate and climate sensitivity, Clim. Dynam., 15, 183–203, 1999.; Curry, J., Rossow, W., Randall, D., and Schramm, J.: Overview of Arctic cloud and radiation characteristics, J. Climate, 9, 1731–1764, 1996.; Davidson, E. and Janssens, I.: Temperature sensitivity of soil carbon decomposition and feedbacks to climate change, Nature, 440, 165–173, 2006.; Eugster, W., Rouse, W., Pielke Sr., R., McFadden, J., Baldocchi, D., Kittel, T., Chapin, F., Liston, G., Vidale, P., Vaganov, E., and Chambers, S.: Land-atmosphere energy exchange in Arctic tundra and boreal forest: available data and feedbacks to climate, Global Change Biol., 6, 84–115, 2000.; Foken, T.: Micrometeorology, Springer, 2008.; Foken, T. and Wichura, B.: Tools for quality assessment of surface-based flux measurements, Agr. Forest Meteorol., 78, 83–105, 1996.; Foken, T., G{ö}ckede, M., Mauder, M., Mahrt, L., Amiro, B., and Munger, J.: Post-field data quality control, in: Handbook of Micrometeorology: A Guide for Surface Flux Measurement and Analysis, Kluwer, 2004.; Garratt, J.: The atmospheric boundary layer, Cambridge Univ. Pr., 1994.; Goodrich, L.: The influence of snow cover on the ground thermal regime, Can. Geotech. J., 19, 421–432, 1982.; Grigoriev, N.: The temperature of permafrost in the Lena delta basin – deposit conditions and properties of the permafrost in Yakutia, Yakutsk, chap. 2, 97–101 pp., 1960.; Hobbie, S., Schimel, J., Trumbore, S., and Randerson, J.: Controls over carbon storage and turnover in high-latitude soils, Global Change Biol., 6, 196–210, 2000.; Hansen, J., Ruedy, R., Sato, M., Imhoff, M., Lawrence, W., Easterling, D., Peterson, T., and Karl, T.:

 

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