| 天气与气候 |
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| Analysis on Decadal Oscillation and Circulation Features of Spring Sand-dust Storm in Midwest of Inner Mongolia |
MA Qing-xia1; HAN Jing-wei2; WANG Xing-chen3
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| 1.Inner Mongolia Climate Center, Hohhot 010051, China;
2.Inner Mongolia Autonomous Region Observatory, Hohhot 010051, China; 3.Technique Equipment Center of Inner Mongolia Meteorological Bureau, Hohhot 010051, China |
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Abstract The following data were used to be used to analyze the decadal atmospheric circulation evolution features in mid and high latitude in winter and spring, and the influence on sand-dust storm frequency in the Midwest of Inner Mongolia: the data of spring sand-dust storm from 1961 to 2000 provided by the 50 meteorological observatories of Inner Mongolia; the data of the monthly mean field at 500 hPa height scaled by 10 longitude multiplied by 5 latitude and of the monthly mean circulation features at 500 hPa height in northern hemisphere, and of the East Asian monsoon provided by National Climate Center. It was revealed that many factors generate different influence on the decadal change of sand-dust storm frequency in the Midwest of Inner Mongolia, these factors include: Qinghai-Tibet Plateau geopotential height, Baikal area geopotential height, Ural mountain geopotential height, Okhotsk sea geopotential height, East Asian winter monsoon, Asian meridional circulation, trough between Indian and Burma, and west Pacific subtropical high intensity, etc. These factors provide the basic circulation background at decadal scale for the short-term climate forecast of sand-dust storm events in Spring in the Midwest of Inner Mongolia.
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Received: 20 March 2007
Published: 20 March 2008
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2008, Vol. 28 
