西太平洋降水化学的研究

摘要: 本文根据TOGA(热带海洋与全球大气)第二航次中采集的36个雨水样品,对西太平洋降水化学特征及其影响因素进行研究。结果表明,海洋降水与大陆污染地区降水化学组成上差异显著,海洋降水基本未受人为排放的影响,但化学组成相当程度上受海洋气溶胶的支配,其中Cl^-、Na⁺、Mg²⁺、Ca²⁺等离子主要来自降水对海盐气溶胶的淋洗和冲刷,海洋生物代谢过程排放的NO和有机硫化物使降水中NO₃^-,SO₄^2-得到富集,在赤道附近富集效应更为突出。

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