大气气溶胶中NO￣－＿3、SO￣（2－）＿4研究

THE STUDIES OF AND IN AEROSOL

根据对国内外有关文献资料的总结归纳，对气溶胶中 、 的研究现状及其在不同类型样品中的浓度量值分别进行了阐述；对雪冰层中的 和 进行了本底划分，并对这些本底的来源、组成及特征进行了分析。

Current emphasis upon the extensive investigation of atmospheric environmental sys-tem has drawn attention to increased emissions of nitrogen and sulphur compounds to theatmosphere by human activities, In this overview we discuss recent work on and in atmospheric aerosols and present the concentration ranges of and inboth aerosol themselves and their records within precipitation and snow and ice stratum ina global scale. In addition , particular effort has been made in classification of and backgrounds” in snow and ice records,and analysis of the compositions and charac-teristics of the backgrounds. This is done to establish a better understanding of order ofmagnitude of nitrogen and sulphur compound emissions to atmosphere from differentsources as well as to add more information to our global understanding of and cycling in atmosphere.