| Biology and Soil |
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| Calculation and Analysis on Wind Erosion Climatic Erosivity in the Tarim Basin |
| YANG Xing-hua1,2, HE Qing1,2, LI Hong-jun1,2, HUO Wen1,2, DING Guo-feng3 |
1.Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
2.Taklimakan Desert Atmosphere and Environment Observation Experiment Station, Tazhong 841000, Xinjiang, China;
3.Bayanbulak Meteorological Station, Hejing 841314, Xinjiang, China |
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Abstract The wind erosion climatic factor index in the Tarim Basin of northwester China was calculated with the function given by the UN Food and Agriculture Organization and based on the meteorological data from 13 weather stations during 1961-2007. The basic features of the wind erosion climatic erosivity (C) in the Tarim Basin were then set forth. The average annual wind erosion climatic factor indexes were in range of 6.3~39.6 in the 13 weather stations, and the average value was 17.5. The C value appeared an increase trend from the west to the east of the basin, with the largest in Ruoqiang in the southeastern margin of the basin. As for seasonal variation, the C value appeared the largest in spring, followed by summer, autumn and winter in order. In the recent 50 years, the wind erosion climatic factor index exhibited a decreasing trend in the Tarim Basin, which showed that the wind erosion climatic erosivity decreased in this region. The wind erosion climatic erosivity is mainly restricted by wind speed in the Tarim Basin, and it has no significant relationship with precipitation.
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Received: 26 July 2011
Published: 20 July 2012
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2012, Vol. 32 
