环球海洋大气气溶胶化学研究 Ⅱ.来源示踪元素的特征

1986年11月—1987年5月,在中国第三次南极考察和环球科学考察期间,收集了58个海洋气溶胶样品,采用中子活化法分析了Al,V,Mn,I,Br,Mg,Na,Cl等元素。应用因子分析、回归分析和富集因子分析对气溶胶中元素进行分类、定量评估和来源判别,讨论不同来源元素的特征,计算各主要来源的贡献分量。结果表明,海洋气溶胶中Al的99.99％是来自陆源地壳风化物,Na的99.2％。和Cl的99.99％是来自海水,V的91.4％。来自陆源污染物。因此,Al可作为海洋气溶胶中陆源地壳风化物的示踪元素,Na和Cl可作为海水源示踪元素,非地壳源的V则可选择为陆源污染物的示踪元素。

STUDIES ON AEROSOL CHEMISTRY IN THE ATMOSPHERE OVER OCEANS II. CHARACTERISTICS OF SOURCE ELEMENTAL TRACERS

Fifty marine aerosol samples were collected in the atmosphere over oceans during the Third Chinese Antarctic Research Expedition and Global Scientific Research Experiment from November 1986 to May 1987. A nuclear activation analysis method was used to determine elememts Al, V, Mn, I, Br, Mg, Na and Li. Characteristics of the elements in marine aerosols were discussed based on the classification, quantitative assessment and sources discrimination of the elements in the marine aerosols using methods of factor analysis, regression analysis and enrichment factor. Contribution contents from various sources were also calculated. The contents of 99.99% of aluminium in marine aerosols are derived form the continental weathered crusts, 99.2% of Sodium and 99.99% of chlorine from seawater, and 91.4% of vanadium from the continental pollutants. Therefore, Al can be selected as an indicator of the continental weathered crust in marine arosols, Na.and Cl as an indicator of seawater, and noncrustal source V as an indicator of the continental pollutants.