云南省温度和气溶胶对微雨影响的初步分析

近40年云南省平均总微雨量占年总雨量比例﹑年平均总微雨日占年总雨日比例均呈下降趋势,并有从北向南逐渐减少的分布规律;近40年云南省年平均能见度也呈下降趋势,其趋势分布同微雨降水趋势分布比较一致;微雨降水的变化同干燥晴天能见度存在正的相关关系,其中云南省东部地区相关显著;而温度与微雨降水存在负相关;云南省气溶胶在一定程度上抑制微雨降水,云南东部气溶胶对微雨的影响比较显著。

THE PRELIMINARY ANALYSIS OF THE IMPACT OF THE TEMPERATURE AND AEROSOL ON THE TRACE OF PRECIPITATION IN YUNNAN

The total average annual of the trace of precipition in accounted for the proportion of the total annual rainfall and The total average annual date of the trace of precipition in accounted for the proportion of the total an- nual rainfull date all have decreased in nearly 40 years. Moreover, the regularity of distribution shows that the quantity has decreased from north to south. The visibility has also decreased, and The trends of distribution is more consistent with the distribution of the trace of precipitation. There was a positive correlation between the change of the trace of precipitation and the visibility of sunny day, particularly in the east of Yunnan. However, there was a negative correlation between the trace of precipitation and the temperature. The Aerosol restrain the Trace of Precipitation to some extent, also particularly in the east of Yunnan.