阿拉善盟沙尘暴统计特征

摘要

通过对阿拉善盟2002—2009年常规气象资料的统计分析,结果表明,阿拉善盟沙尘暴天气以拐子湖为高发中心,以阿拉善左旗为低发中心;沙尘暴多发生在春、夏两季,冬季次之,秋季最少;阿拉善盟大风从西北偏北、东北偏北和东南偏东3个风方位来时,发生沙尘暴的概率最高;降水对沙尘暴具有一定的抑制作用,大风在春季时对沙尘暴影响最大.%Statistical analysis by conventional meteorological data in Alxa League from 2002 to 2009,the result showed that the sandstorm weather occurs with high frequency in Guaizi Lake and low frequency in Zuoqi;The sandstorm weather occurs frequently in spring and summer,the lower frequency in winter,the lowest frequency in autumn;When the wind comes from north-northwest,or north-northeast,or east-southeast,the probability of sandstorm is high;Precipitation has inhibition action to the occurrence of sandstorm,gale in spring has a great influence on sandstorm.