近50年首都圈沙尘暴的变化趋势及其与气温_降水和风的关系_陈玉福.pdfVIP

DOI :10.13227/j.hjkx.2005.01.008 26 1 　　　　　　 Vol.26, No.1 2005 1 Jan., 2005 ENVIRONMENTAL SCIENCE 50 、 1 2 , (1., 　100101;2., 　100875) :11 50 , 11 2000 , 、.:, ., .、 、、 、、7 2000 , 4 ., ., 6 ;, 3～4 、; , 1 .4 、 . . :;;;; :X14　:A　:0250-3301(2005)01-0032-06 Dust Storms Trend in the Capital Circle of China over the Past 50 Years and Its Correlation with Temperature, Precipitation and Wind 1 2 CHEN u-fu , TANG Hai-ping (1.Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing　100101, China;2.College of ResourcesSci- ence and Technology, Beijing Normal University, Beijing　100875, China) Abstract:The trendsof number of dust storm days of the selected 11meteorological stationsfrom their established year to 2000 as well as their correlations with temperature, precipitation and wind are revealed.The number of dust storm days of the Capital Circle of China is distinctly variable in space and time.The numbers of dust storm days of the western area arefar more than those of the east- ern area.The interannual variability of number of dust storm days is remarkable.The number of dust storm days of the following 7 stations, Erlianhaote, Abaga, Xilinhaote, Fengning, Zhangjiakou, Huailai and Beijing, declined along the past decades, but those of the other four stations had no significant upward or downward trends.There is a marked seasonality of the number of dust storm days, and the maximum was in April.The correlation between number of dust storm days and number of days of mean wind velocity 5 m/s, which is critical wind velocity to entrain sand into the air, was strongest among the three climaticfactor.Therewere sig