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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (4): 1131-1137    DOI: 10.7522/j.issn.1000-694X.2013.00160
Weather and Climate     
Characteristics of Sand-dust Weather and the Relationship between Land Surface Conditions and Sand-dust Weather in Semi-arid Region of Inner Mongolia, China
CHEN Yi1,2, SHANG Ke-zheng1, WANG Shi-gong1, LI Yan1, XIONG Guang-jie1
1.Ministry of Education Key Laboratory of Semi-Arid Climate Change/School of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China;
2.Unit 63870 of People’s Liberation Army, Huayin 714200, Shaanxi, China
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Abstract  

In this paper, based on meteorological data from the Zhurihe meteorological station and normalized difference vegetation index (NDVI), leaf area index (LAI), net primary productivity (NPP) in Zhurihe from 2002 to 2010, the characteristics of sand-dust weather and the relationships between land surface conditions and sand-dust weather in zhurihe were analyzed. The threshold wind speed is 9.4 m·s-1 in Zhurihe. The frequency of sand-dust weather and strong wind is fluctuant from 2002 to 2010. Sand-dust weather frequency is positively correlated with strong wind. Wind of more than 18 m·s-1 can easily lead to sand-dust weather. The normalized dust outbreak frequency (NfDO) is defined as the ratio of sand-dust weather frequency to strong wind frequency. NfDO in spring was always low in Zhurihe, when the accumulated precipitation amount from June to August, maximum NDVI, maximum LAI and maximum NPP from June to August during the previous year exceeded their thresholds (100 mm,0.24,0.3 and 0.6 g C·m-2·d-1, respectively). It suggests that the precipitation amount during the vegetation growing season predominantly controls plant production in summer and the land erodibility in spring of the next year and suppress sand-dust outbreak.

Key words:  sand-dust weather      semi-arid regions      land surface conditions      Inner Mongolia     
Received:  29 May 2012      Published:  23 July 2012
ZTFLH:  P467  

Cite this article: 

CHEN Yi1,2, SHANG Ke-zheng1, WANG Shi-gong1, LI Yan1, XIONG Guang-jie1. Characteristics of Sand-dust Weather and the Relationship between Land Surface Conditions and Sand-dust Weather in Semi-arid Region of Inner Mongolia, China. JOURNAL OF DESERT RESEARCH, 2013, 33(4): 1131-1137.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00160     OR     http://www.desert.ac.cn/EN/Y2013/V33/I4/1131

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