秋季东海二甲基亚砜的分布与影响因素研究  

Study on the distribution of dimethylsulfoxide and its influencing factors in the East China Sea during autumn

作　　者：高楠[1] 张洪海[1] 杨桂朋[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100

出　　处：《海洋学报》2014年第4期110-117,共8页

基　　金：国家自然科学基金重点项目(41030858);教育部博士点新教师基金项目(20110132120010);教育部"长江学者"奖励计划项目;山东省"泰山学者"建设工程专项

摘　　要：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。The spatial distributions of particulate and dissolved dimethylsulfoxide （DMSOp and DMSOd） and fac- tors influencing them were investigated in the surface water and vertical transect PN of the East China Sea （ECS） in November 2010. The concentrations of DMSOp and DMSOd in the surface water ranged from 2.49 to 85.5 nmol/L and from 2.27 to 86. 6 nmol/L, respectively, with average values of （17.2± 1.40） nmol/L and （15.3 ±1.29）nmol/L. The horizontal distribution of DMSOp decreased offshore, with the same pattern as chlorophyll a （Chl a）, while higher level of DMSOd appeared in the upwelling region of the southwest ECS. The vertical distri- bution of DMSOd along transect PN revealed higher concentrations in the surface water, whereas higher values of DMSOp appeared in the coastal bottom water. Significant correlations were observed between DMSOp and particu- late dimethylsulfoniopropionate （DMSPp） as well as between DMSOp/Chl a ratio and salinity, suggesting the simi- lar sources and functions between DMSOp and DMSPp. In addition,the positive relationship between DMSOd and dimethylsuifide （DMS） indicated that the oxidation of DMS was an important source of DMSOd in the ECS.

关 键 词：二甲基亚砜 分布 影响因素 东海 

分 类 号：P734.21[天文地球—海洋化学]