Title: Wind directional dependency of surface energy fluxes over north-eastern Siberia and its implications
Abstract:In order to better understand the water cycle over tundra, micro-meteorological and hydrological observations were carried out over tundra near Tiksi, North-eastern Siberia and seasonal variations of ...In order to better understand the water cycle over tundra, micro-meteorological and hydrological observations were carried out over tundra near Tiksi, North-eastern Siberia and seasonal variations of energy budget components were estimated for two years. As an average, net radiation was partitioned for sensible heat flux 25-30%, for latent heat flux 50-55% and for soil conductive heat flux 20%. Those ratios were changed by wind direction. The southwesterly winds were warm and dry, made the sensible heat flux small or its direction changed towards ground surface, and the northeasterly winds were cold, gave the sensible heat flux to the atmosphere from the tundra surface. The southwesterly winds were associated with cyclone intrusions to this area and the northeasterly winds with anti-cyclones. More frequent intrusions of cyclones would decrease the sensible heat flux and increase the latent heat flux. A simple air temperature increase experiments using a simple heat balance model showed that the sensible heat flux decreased, the latent heat flux unchanged and conductive heat flux in soil increased. Keyword: tundra, energy budget, wind direction, heat fluxRead More
Publication Year: 2004
Publication Date: 2004-12-01
Language: en
Type: article
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