中文摘要：

通过对芜湖市春夏大气降尘的粒度测试表明,大气降尘以小于50μm为主,除6月份外,都达到了70%以上,其中10～50μm颗粒含量在50%左右；小于10μm颗粒除4月份外均未超过30%,4月份含量高达37%,各月份中均含有大于350μm粗粒组分。说明芜湖大气降尘以近源为主,春季受北方沙尘暴影响,使细粒组分增加。另外,芜湖大气受到人类生产活动的影响较重,含有较多的粗粒组分。

英文摘要：

Through the grain size tests of Wuhu atmospheric dust fall in spring and summer show that,the dominated component part is less than 50μm,except June,reached more than 70%.The 10～50μm particle concentrations were about 50%;less than 10μm particles,except April,did not exceed 30%,the April was up to 37percent.Each month contains the coarse fraction particle,is greater than 350μm.All of these demonstrated that Wuhu atmospheric dust was nearly source-based,spring dust storms in northern China,increased the fine fraction.In addition,Wuhu atmosphere impacted heavily by human activities.