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Langer, Moritz; Westermann, Sebastian; Muster, Sina; Piel, Konstanze; Boike, Julia (2012): Heat fluxes and surface radiation measurements from Samoylov Island, Lena Delta, Siberia, October 2007 to March 2008. PANGAEA,, Supplement to: Langer, M et al. (2011): The surface energy balance of a polygonal tundra site in northern Siberia – Part 2: Winter. The Cryosphere, 5, 509-524,

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In this study, we present the winter time surface energy balance at a polygonal tundra site in northern Siberia based on independent measurements of the net radiation, the sensible heat flux and the ground heat flux from two winter seasons. The latent heat flux is inferred from measurements of the atmospheric turbulence characteristics and a model approach. The long-wave radiation is found to be the dominant factor in the surface energy balance. The radiative losses are balanced to about 60 % by the ground heat flux and almost 40 % by the sensible heat fluxes, whereas the contribution of the latent heat flux is small. The main controlling factors of the surface energy budget are the snow cover, the cloudiness and the soil temperature gradient. Large spatial differences in the surface energy balance are observed between tundra soils and a small pond. The ground heat flux released at a freezing pond is by a factor of two higher compared to the freezing soil, whereas large differences in net radiation between the pond and soil are only observed at the end of the winter period. Differences in the surface energy balance between the two winter seasons are found to be related to differences in snow depth and cloud cover which strongly affect the temperature evolution and the freeze-up at the investigated pond.
Latitude: 72.376480 * Longitude: 126.489230
Date/Time Start: 2007-10-01T00:00:00 * Date/Time End: 2009-03-01T00:00:00
Minimum HEIGHT above ground: m * Maximum HEIGHT above ground: m
Samoylov_Island * Latitude: 72.376480 * Longitude: 126.489230 * Elevation: 8.0 m * Location: Samoylov Island, Lena Delta, Siberia * Method/Device: Multiple investigations (MULT)
See doi:10.1594/PANGAEA.789132 for the period April to September 2007.
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
2HEIGHT above groundHeightmGeocode
3Time in daysTimedaysBoike, JuliaMATLAB Date
4Net radiationNETW/m2Boike, JuliaRadiometer, Kipp & Zonen, CNR 1
5Net radiationNETW/m2Boike, JuliaNet radiometer, Kipp & Zonen, NR Lite
6Heat Flux, sensibleQhW/m2Boike, JuliaCalculatedQH, Eddy
7Heat Flux, latentQeW/m2Boike, JuliaCalculatedQE, Eddy
8Heat Flux, latentQeW/m2Boike, JuliaCalculatedQE, modelled
9Ground heat fluxGround heat fluxW/m2Boike, JuliaCalculatedQG, wet soil
10Ground heat fluxGround heat fluxW/m2Boike, JuliaCalculatedQG, dry soil
11Ground heat fluxGround heat fluxW/m2Boike, JuliaCalculatedQG, lake ice
12Short-wave downward (GLOBAL) radiationSWDW/m2Boike, JuliaRadiometer, Kipp & Zonen, CNR 1CNR1
13Short-wave upward (REFLEX) radiationSWUW/m2Boike, JuliaRadiometer, Kipp & Zonen, CNR 1CNR1
14Long-wave downward radiationLWDW/m2Boike, JuliaRadiometer, Kipp & Zonen, CNR 1CNR1
15Long-wave upward radiationLWUW/m2Boike, JuliaRadiometer, Kipp & Zonen, CNR 1CNR1
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