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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (4): 1144-1149    DOI: 10.7522/j.issn.1000-694X.2013.00162
Weather and Climate     
Change Characteristics of Sandstorm Frequency and Its Causes in 2001-2010 over Minqin, Gansu, China
ZHAO Ming-rui1,2, YAN Da-tong2, LI Yan-ying1,3, ZHANG Chun-song2, HU Li-li2
1.Key Open Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration/Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China;
2.Minqin Meteorological Bureau, Minqin 733300, Gansu, China;
3.Wuwei Meteorological Bureau, Wuwei 733099, Gansu, China
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Abstract  

Change characteristics of sandstorm frequency in 2001-2010 over Minqin are analyzed by using meteorological observations data and "China Dust Weather Yearbook" by China Meteorological Administration during 2001-2010. Results show that sandstorms in 2001-2010 over Minqin were mainly local sandstorms; regional sandstorms appeared more separately and earlier than local sandstorms in daytime; the most regional sandstorms occurred in April but local sandstorms the mostly occurred in June; the most regional sandstorms occurred in spring, but the local sandstorms occurred the same in spring as in summer; inter-annual trend was down significantly. Sandstorms intensities did not weaken and the frequency of strong sandstorms did not significantly change by analysis of annually strong sandstorms' frequency, mean lasting time, economic loss caused by sandstorm. From sandstorm real-time surface and sounding data of typical gale-sandstorm cases during 1971-2010 in Minqin, the causes of sandstorm frequency reducing are as followed: decreases in number of gale days and average wind velocity, increase of local vegetation cover year after year, improvement of stabilization in atmospheric boundary layer over surface and middle-lower air, increase of warm advection and weakness of cold air over surface layer

Key words:  sandstorm      change characteristics      causes      Minqin     
Received:  28 August 2012      Published:  24 October 2012
ZTFLH:  P445.4  

Cite this article: 

ZHAO Ming-rui1,2, YAN Da-tong2, LI Yan-ying1,3, ZHANG Chun-song2, HU Li-li2. Change Characteristics of Sandstorm Frequency and Its Causes in 2001-2010 over Minqin, Gansu, China. JOURNAL OF DESERT RESEARCH, 2013, 33(4): 1144-1149.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00162     OR     http://www.desert.ac.cn/EN/Y2013/V33/I4/1144

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