Wind direction dependency of water and energy fluxes and synoptic conditions over a tundra near Tiksi, Siberia

• Published in: Hydrological Processes
• Main Authors: Kodama, Yuji, Sato, Norifumi, Yabuki, Hironori, Ishii, Yoshiyuki, Nomura, Mutsumi, Ohata, Tetsuo
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2007
• Subjects: Tiksi; Tundra; Siberia
• Online Access: http://dx.doi.org/10.1002/hyp.6712; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.6712; https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.6712

Abstract In order to better understand the water cycle over tundra, micro‐meteorological observations were carried out over tundra near Tiksi, northeastern Siberia, and seasonal variations in the energy budget components were estimated for a period of 2 years. As an average for 1998 and 1999, net radiation was partitioned into a sensible heat flux of 25–30%, to a latent heat flux of 50–55%, and to a soil conductive heat flux of 15–25%. These ratios were changed by wind direction. The southwesterly winds were warm and dry, reducing sensible heat flux or changing its direction towards the ground surface, while northeasterly winds were cold, resulting in a sensible heat flux into the atmosphere from the tundra surface. Southwesterly winds were associated with cyclone intrusions into this area, and northeasterly winds were associated with anti‐cyclones. More frequent intrusions of cyclones would decrease the sensible heat flux and increase the latent heat flux. Copyright © 2007 John Wiley & Sons, Ltd.