典型背景点降水化学组份的分析

全球背景降水划分为海洋型，内陆型和海洋与内陆相间型三种，以太平洋的Ａｍｓｔｅｒｄａｍ和大西洋的Ｓ；Ｇｅｏｒｇｅｓ为例，研究海洋型背景降水受海洋大气环流控制，化学组分来源于海洋气溶胶。分析了澳大利亚Ｋａｔｈｅｒｉｎｅ海洋与内陆相间型，背景降水化学组份来主要来源于海洋气溶胶和内陆大气污染传输两者的相关性。

ANALYSIS OF CHEMICAL COMPOSITION OF PRECIPITATION IN TYPICAL BACKGROUND SITE

Background precipitation in the whole world is divided into ocean type, continent type and ocean alternating with continent type. Taking Amsterdam in Pacific ocean and St. Georges in Atlantic ocean as example,we studied that ocean type background precipitation is controlled by ocean atmospheric circulation, its chemical compositions come from ocean aerosol. We also analyzed that chemical compositions of background precipitation in Katherine, Australia, ocean alternating with continent type, are mainly from ocean aerosol and continental atmospheric pollutants transfer, correlativity between them are also studied as well. But in Lijiang, China,continent type,chemical compositions of atmospheric background precipitation are mainly come from fly ash and continental atmospheric transfer,and haven't obvious correlativity with ocean aerosol.