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二甲基硫(即DMS)是海水中最主要的挥发性有机硫化物,其一旦被释放到大气中去,会被快速氧化成非海盐硫酸盐(NSS-SO_4~(2-))而参与气候变化过程和酸雨形成过程.因此,有关它的研究已引起了人们的普遍关注.但迄今为止,关于DMS在海水微表层中的浓度测定及其富集情况的报道较为少见且结论存在很大分歧.如Nguyen等人发现海水微表层会对DMS产生明显的富集作用,而Andreae报道海水微表层不会对DMS产生富集作用,Turner和Liss他未发现DMS在微表层中与次表层中的明显差别.那么到底微表层是否会对DMS产生富集作用呢?我们已经报道,海水微表层会对有机物和无机物产生富集作用,Gibbs吸附定律在海水微表层中出现反常.DMS是否也不例外?这是人们普遍关心的问题,也是本文研究的主要内容.为此,我们对南沙海区海水微表层中DMS的分布与富集情况进行了探讨,并为计算DMS的海-气通量提供了重要依据.
Dimethylsulfide (DMS) is the most predominant volatile organic sulfide in seawater that, upon being released into the atmosphere, is rapidly oxidized to non-sea salt sulfate (NSS-SO 4 2-) to participate Climate change process and the formation of acid rain, so its research has aroused widespread concern.But so far, DMS concentration in the sea water micro-surface measurement and enrichment of the reports are rare and there is a large conclusion As Nguyen et al. Found that the seawater micro-surface layer will have a significant enrichment of DMS, Andreae reported that the seawater micro-surface layer will not enrich the DMS, Turner and Liss he did not find the DMS in the micro-surface and subsurface Then whether the micro-surface layer will enrich the DMS? We have reported that the micro-surface of sea water will enrich the organic and inorganic matter, and the Gibbs adsorption law is anomalous in the micro-surface of seawater. Is no exception? This is a matter of universal concern, but also the main content of this study.Therefore, we explore the distribution and enrichment of DMS in the surface water of the Nansha sea area, and for the calculation of DMS sea-air through It provides an important basis.