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| Characteristics of Turbulence Energy Dissipation Rates and Structure Function Parameters in the Hinterland of the Taklimakan Desert |
| Wen Yating1,2, He Hongrang2, Wang Chunming2, Wang Liqiong2, Jiao Bing2 |
1. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
2. PLA University of Science and Technology, Nanjing 211101, China |
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Abstract The turbulent data obtained from 80 meters grads sounding system at Tazhong meteorological station were used to calculate and analyze the characteristics of turbulence length scales for momentum and heat, turbulence energy dissipation rate and turbulence structure function parameter in the hinterland of the Taklimakan Desert. The results indicate that the values of turbulence characteristic length scales are the maximum in weakly unstable or near neutral air, decrease obviously with the increase of the unstable degree, increase rapidly first and then decrease slowly with the increase of stable degree. The characteristic length scale of heat is an order larger than that of momentum on the whole. The fitting functions forms of dimensionless heat dissipation rate are consistent with other experiments, just a little difference in experience coefficients. The agreements of the turbulence energy dissipation rates and turbulence structure function parameters calculated indirectly from the turbulence spectral method and directly from the Kaimal method are quite good.
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Received: 15 May 2013
Published: 20 July 2014
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2014, Vol. 34 
