京津风沙源区沙尘天气与风力、降水的时空相关性  

Spatio-temporal Correlation of Sand-dust Weather with Wind Force and Precipitation in the Source Area of Blown Sand Threatening Beijing and Tianjin

作　　者：张加琼[1,2] 张春来[1,2] 刘永刚[1,2] 周娜[1,2] 

机构地区：[1]北京师范大学地表过程与资源生态国家重点实验室 [2]北京师范大学防沙治沙教育部工程研究中心,北京100875

出　　处：《中国沙漠》2010年第6期1278-1284,共7页Journal of Desert Research

基　　金：地表过程与资源生态国家重点实验室自主研究课题(2008-ZZ-01);国家“十一五”科技支撑计划项目(2006BAC18B06);教育部新世纪人才计划项目(NCET-08-0059)资助

摘　　要：京津风沙源区12个气象站点2000—2007年间沙尘天气及相关气象资料分析表明,该区沙尘天气时空变化很大程度取决于大风和降水的时空配合关系,其中大风和降水综合作用与沙尘天气的空间相关性(R2=0.960)、月际变化相关性(R2=0.995)尤为显著,年际变化相关性则由于京津风沙源治理工程对区内植被盖度的持续改善作用而受到影响,但相关系数仍较高(R2=0.864)。大风日数、降水量与沙尘天气日数之间显著的时空相关性表明,利用多因素统计方法获得的时空相关关系式对预测区内沙尘天气日数具有参考意义。Analysis of meteorological data during 2000—2007 collected from12 weather stations in the blown-sand source area threatening Beijing and Tianjin shows that the spatio-temporal distribution of sanddust weather is determined by the combination of gale and precipitation in space and time to a great degree.The gale-precipitation combination significantly influenced the spatial sand-dust weather distribution（R2= 0.960）and the monthly sand-dust weather variation（R2=0.995）.The influence on the annual sand-dust weather variation was still outstanding（R2=0.864）though the effect was partly canceled by the management engineering through improving vegetation coverage in the sand source region.The significant correlations of sand-dust weather with gale days and precipitation imply that the correlation functions from multifactor regression can be applied to forecast sand-dust days in the source area of blown-sand threatening Beijing and Tianjin.

关 键 词：京津风沙源区 沙尘天气 空间相关性 时间相关性 

分 类 号：P445.4[天文地球—大气科学及气象学]