Evaluating the impact and significance of meteorological factors upon dust storm occurrence  

作　　者：WanYuan Li ShiHua Lv Ye Yu ZhiBao Dong ZhiBao Shen YuChun Chen 

机构地区：[1]Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China. [2]Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.

出　　处：《Research in Cold and Arid Regions》2011年第2期161-171,共11页寒旱区科学（英文版）

基　　金：supported by the Hundred Talent Project of Chinese Academy of Sciences granted to Dr. Y. Yu;the Primary Natural Sciences Foundation of China (40633014) granted to Professor S.H. Lü

摘　　要：In this article, the quantitative impact and significance of factors on dust storm occurrence have been analyzed in detail, based on spring daily data sets of 17 meteorological factors and dust storm records during the period of 1954-2005 for 60 gauge stations distributed over Gansu Province of China. Results show that daily mean and maximum wind speeds and evaporation have a positive effect on dust storm occurrence, i.e., their increase can result in an increase of dust storm occurrence. Inversely, daily mean and minimum relative humidity, lowest surface air pressure, vapor pressure and number of sunny hours have a negative effect on dust storm occurrence. However, daily mean and highest surface air pressure; mean, highest and lowest surface air temperature; and precipitation of 20：00-08：00, 08：00-20：00 and 20：00-20：00 have a positive effect on dust storm occurrence in some places but negative in other places. On average, daily maximum and mean wind speeds, direction of the maximum wind, number of sunny hours and evaporation have a significant effect on dust storm occurrence in Gansu Province, but precipitation of 20：00--08：00, 08：00-20：00 and 20：00-20：00, and mean surface air pressure and temperature all have a minor influence upon dust storm occurrence.In this article, the quantitative impact and significance of factors on dust storm occurrence have been analyzed in detail, based on spring daily data sets of 17 meteorological factors and dust storm records during the period of 1954-2005 for 60 gauge stations distributed over Gansu Province of China. Results show that daily mean and maximum wind speeds and evaporation have a positive effect on dust storm occurrence, i.e., their increase can result in an increase of dust storm occurrence. Inversely, daily mean and minimum relative humidity, lowest surface air pressure, vapor pressure and number of sunny hours have a negative effect on dust storm occurrence. However, daily mean and highest surface air pressure; mean, highest and lowest surface air temperature; and precipitation of 20：00-08：00, 08：00-20：00 and 20：00-20：00 have a positive effect on dust storm occurrence in some places but negative in other places. On average, daily maximum and mean wind speeds, direction of the maximum wind, number of sunny hours and evaporation have a significant effect on dust storm occurrence in Gansu Province, but precipitation of 20：00--08：00, 08：00-20：00 and 20：00-20：00, and mean surface air pressure and temperature all have a minor influence upon dust storm occurrence.

关 键 词：Gansu Province meteorological factor spring dust storm occurrence impact and significance 

分 类 号：P425.55[天文地球—大气科学及气象学] S562[农业科学—作物学]