冬季黄海生源硫的分布、海-气通量及其对气溶胶中非海盐硫酸盐的贡献  

Distribution and Sea-to-Air Flux of Biogenic Sulfur in the Yellow Sea and Its Contribution to the Non-Sea-Salt Sulfate in Atmospheric Aerosol in Winter

作　　者：杨剑[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：《中国海洋大学学报（自然科学版）》2015年第7期80-90,共11页Periodical of Ocean University of China

基　　金：国家自然科学基金重点项目(41030858);教育部"长江学者"奖励计划项目;山东省"泰山学者"建设工程项目资助

摘　　要：2009年12月对黄海进行了大面调查,研究了冬季黄海二甲基硫（DMS）和二甲巯基丙酸内盐（DMSP）的浓度分布、DMS海-气通量及其影响因素。调查结果表明,DMS、溶解态DMSP（DMSPd）和颗粒态DMSP（DMSPp）的浓度分别为0.95（0.07~3.30）、1.18（0.22~3.54）和5.01（1.63~12.33）nmol·L^-1。总体上DMS和DMSP的水平分布与叶绿素a（Chl-a）相类似,呈现近岸高、远海低的趋势。35°N断面的垂直调查结果显示,在水深小于50m的水体中Chl-a、DMS和DMSP浓度较高且分布相对均匀。相关性分析发现,仅DMSPp与Chl-a之间存在一定的相关性。利用Nightingale公式（N2000）估算了冬季黄海DMS的海-气通量,其平均值为2.16μmol·m^-2·d^-1。此外,根据大气气溶胶中甲基磺酸盐（MSA）和非海盐硫酸盐（nss-SO2-4）的浓度和比例,估算出生源硫释放对气溶胶中nss-SO2-4的贡献比例仅为2.85%,表明冬季黄海大气nss-SO2-4主要受人为活动排放控制。The spatial distributions of dimethylsulfide（DMS）and dimethylsulfoniopropionate（DMSP）and sea-to-air flux of DMS as well as their influencing factors were studied in the Yellow Sea during December,2009.The surface water concentrations of DMS,dissolved DMSP（DMSPd）and particulate DMSP（DMSPp）were 0.95（0.07~3.30）,1.18（0.22~3.54）and 5.01（1.63~12.33）nmol L-1,respectively.On the whole,the horizontal distributions of DMS and DMSP decreased offshore,with the same trend as chlorophyll a（Chl-a）.Vertical distributions of Chl-a,DMS and DMSP along 35°N transect revealed high concentrations and uniform distributions in the upper 50 m water layer.A significant relationship between DMSPp and Chl-a was found in the surface water.Besides,the average sea-to-air flux of DMS was estimated to be 2.16μmol m-2 d-1 using the equation of Nightingale et al.（2000）.Based on the concentrations of methanesulfonic acid（MSA）and non-sea-salt sulfate（nss-SO2-4）,the relative contribution of biogenic sulfur to total nss-SO2-4was estimated to be 2.85%,implying that anthropogenic source is the major contribution to sulfur budget over the Yellow Sea in winter.

关 键 词：二甲基硫 二甲巯基丙酸内盐 非海盐硫酸盐 甲基磺酸盐 黄海 

分 类 号：P734.4[天文地球—海洋化学]