| 沙漠与沙漠化 |
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| Dust Emission and Transmission during Spring Sand-dust Storm in Hunshandake Sand-land
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| YUE Ping1,2,3; NIU Sheng-jie2; LIU Xiao-yun4 |
| 1.Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Laboratory of Arid Climatic Changing and Reducing Disaster of CMA, Institute of Arid Meteorology, China Meteorology Administration, Lanzhou 730020, China;
2.Nanjing University of Information Science and Technology, Nanjing 210044, China;
3.Natioanl Meteorological Observatory of Zhangye, Zhangye 734000, Gansu, China;
4.Jiuquan Meteorological Bureau of Gansu Province, Jiuquan 735000, Gansu, China
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Abstract Sand-dust storm is an intense wind erosion process and it simultaneously exacerbates the land desertification process. The ecological environmental effect and climatic effect of dust aerosol in sand-dust storm have become the focus of attention of the international community of science. In this paper, the dust aerosol number concentration and its transmission characters during spring sand-dust storms were analyzed based on the observation data in Hunshandake sand-land. It was calculated that the dust-emitting wind speed on the sand-land is 5.9 m·s-1 at 10 m high, and the transmission distance of dust particles in sand-dust storm weather condition is about 7.6 104~7.6×105 km.
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Received: 01 January 1900
Published: 20 March 2008
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2008, Vol. 28 
