| Weather and Climate |
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| Relationship between Spring Sandstorm Frequency in the Tarim Basin and Atmospheric Circulation |
| LI Hong-jun1,2, YANG Xing-hua1,2, ZHAO Yong1,2, WANG Min-zhong1,2, HUO Wen1,2 |
1.Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
2.Taklimakan Desert Atmosphere and Environment Observation Experiment Station, Tazhong 841000, Xinjiang, China |
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Abstract The relationship between spring sandstorm frequency in the Tarim Basin and atmospheric circulation is analyzed based on the NCEP/NCAR reanalysis data during 1961-2009 and the monthly sandstorm frequency data from 37 weather stations in Tarim Basin. Results show that their relationship is close. There is significantly negative relationship between spring sandstorm frequency in the Tarim Basin and the atmospheric circulation at 500 hPa geopotential height in the Paris Basin and the middle-west Mongolia; there is positive relationship with atmospheric circulation in the Ural River. The 500 hPa geopotential height increased in the middle-west Mongolia in recent 50 years, decreased in the Ural River; the decrease of longitude circulation between these two areas caused the decrease of sandstorm frequency in the Tarim Basin. The abrupt change of spring sandstorm frequency in the Tarim Basin is associated with the abrupt change of 500 hPa geopotential height in the west of Mongolia, and their variation trend is almost opposite. The abrupt change of sandstorm frequency happened in 1985, but that of the 500 hPa geopotential height happened in 1980 and 1984. The enhancement of 500 hPa geopotential height cyclone in the west Mongolia and anticyclone in the East Europe Plain is the typical circulation situation of frequent sandstorm events in spring in the Tarim Basin.
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Received: 21 October 2011
Published: 28 November 2011
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2012, Vol. 32 
