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| Scale of Atmospheric Turbulence of the Taklimakan Desert |
| Ali Mamtimin1,2, Li Zhenjie3, Jin Lili2, Miao Qilong2, He Qing1 |
1. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
2. College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China;
3. Lincang Meteorological Bureau, Lincang 677099, Yunnan, China |
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Abstract In this paper, the Euler time correlation coefficients and the integral time scale of turbulence in the surface layer over the Taklimakan Desert were analyzed by eddy correlation system data from January to December, 2009. (1) The Euler time correlation coefficients as Ru(t), Rv(t) and Rw(t) are significantly different under different stability condition and different season. The attenuation speed rate of vertical Euler time correlation coefficient Rw(t) is fastest in spring and attenuation time of three direction Euler time correlation coefficients are similar in summer. (2) Euler time correlation coefficients are demonstrated three attenuation types as heavy, gradually and slowly. The attenuation rate of Euler time correlation coefficients in sandstorm weather is stronger than on the sunny day. (3) For the turbulence time integral scale, Rt(z) is minimum, Rt(x) and Rt(y) are similar. In the sandstorm process, the horizontal wind speed dominates while turbulence develop is very difficult. (4) The spatial scales of turbulence in desert are significantly different under different stability and different seasons. The average of L(x), L(y) and L(z) are 6.02 m, 6.90 m and 0.73 m, respectively. In most cases, the shape of spatial scales present ellipsoid and similar to ellipse at horizontal level.
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Received: 20 March 2014
Published: 20 July 2015
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2015, Vol. 35 
