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秋季东海二甲基亚砜的分布与影响因素研究

DOI: 10.3969/j.issn.0253-4193.2014.04.011, PP. 110-117

Keywords: 二甲基亚砜,分布,影响因素,东海

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Abstract:

2010年11月对东海进行了大面调查,研究了秋季东海表层水中颗粒态和溶解态二甲基亚砜(DMSOp和DMSOd)的水平分布和PN断面的垂直分布特征及其影响因素。结果显示,表层海水中DMSOp和DMSOd的浓度范围分别为2.49~85.5nmol/L和2.27~86.6nmol/L,平均值分别为(17.2±1.40)nmol/L和(15.3±1.29)nmol/L。DMSOp水平分布与叶绿素a(Chla)相类似,呈现近岸高、远海低的趋势,而DMSOd浓度高值区主要集中在东海西南部上升流区域。分析PN断面的垂直分布可见,DMSOp在近岸底层水中浓度较高,而DMSOd浓度在表层出现高值。相关性分析的结果表明,DMSOp与颗粒态二甲巯基丙酸内盐(DMSPp)以及DMSOp/Chla比值与盐度分别存在一定的相关性,说明DMSOp与DMSPp具有相似的来源及生理功能。此外,DMSOd与二甲基硫(DMS)浓度具有正相关关系,说明DMS的氧化是东海DMSOd的一个重要来源途径。

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