Flux–Gradient Relationships in the Atmospheric Surface Layer Over the Gobi Desert in China |
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| Authors: | Xingzhuo Song Hongsheng Zhang Jiayi Chen Soon-Ung Park |
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| Institution: | (1) Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, NJ 08901, USA;(2) Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, USA;(3) NASA Goddard Institute for Space Studies, New York, USA;(4) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, People’s Republic of China;(5) Department of Ecology, Evolution and Natural Resources, Rutgers University, New Brunswick, USA |
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| Abstract: | A field campaign was conducted to collect high quality vertical wind speed and temperature profiles with simultaneous turbulent
momentum and sensible heat fluxes over the flat Gobi surface located at 39°09′N, 100°06′E at an elevation of 1,458 m during
the Pilot Intensive Observation Period in 1990. Careful evaluation of the observations in near-neutral conditions supports
a value of the von Karman constant close to 0.39, which is in good agreement with the results obtained from many other field
experiments conducted in low elevation regions. In near-neutral stratification the turbulent Prandtl number is found to be
1 but with lower confidence due to scarcity and scatter of the data points. For an expanded stability range, exponents of
−1/4 and −1/2 are respectively best fitted to the functional relations for the non-dimensional wind and temperature profile
functions in unstable stratification but linear relations still hold for stable stratification in this high elevation region. |
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