夏季东海生源硫的分布、通量及其对非海盐硫酸盐的贡献

发布时间：2018-01-17 14:37

本文关键词：夏季东海生源硫的分布、通量及其对非海盐硫酸盐的贡献　出处：《中国环境科学》2016年11期 　论文类型：期刊论文

【摘要】：对2012年6月东海表层海水中二甲基硫(DMS)、二甲巯基丙酸内盐(DMSP)和二甲亚砜(DMSO)的浓度分布特征及其影响因素进行了研究,并估算了DMS的海-气通量及其对大气气溶胶中非海盐硫酸盐(nss-SO_4~(2-))的贡献率.结果表明,DMS、溶解态DMSP(DMSPd)、颗粒态DMSP(DMSPp)、溶解态DMSO(DMSOd)和颗粒态DMSO(DMSOp)的浓度平均值±标准偏差为(5.71±5.23),(5.94±3.68),(23.84±14.15),(9.14±10.52)和(11.01±5.81)nmol/L.DMS、DMSP和DMSOp浓度均在28°N~29°N,122°E~123.5°E海域呈现高值中心,沿中心向外扩散降低,并且与叶绿素a(Chl-a)的分布趋势基本一致.除DMSOd外,3种二甲基硫化物与Chl-a表现出显著的相关性,表明浮游植物生物量是影响东海生源有机硫化物生产分布的关键因素.此外,夏季东海DMS海-气通量介于(0.93~101.02)μmol/(m~2·d),平均值±标准偏差为(18.13±21.42)μmol/(m~2·d).夏季东海生源硫释放对nss-SO_4~(2-)的贡献率仅为2.2%,表明人为排放是东海大气气溶胶中nss-SO_4~(2-)的主要来源.
[Abstract]:In June 2012, the concentration distribution characteristics and influencing factors of DMS, DMSP and DMSO in the surface sea water of the East China Sea were studied. The sea-air flux of DMS and its contribution to non-marine sulfate (NSS) were estimated. Dissolved DMSPN (DMSPdN) and granular DMSPN (DMSPP). The average 卤standard deviations of the concentrations of dissolved DMSOD and granular DMSOSOP were 5.71 卤5.23 and 5.94 卤3.68). And 11.01 卤5.81 nmol / L DMS. The concentrations of DMSP and DMSOp in the area of 28 掳NV 29 掳N ~ (122) 掳E ~ (122) 掳E ~ (125) 掳E showed a high value center, and the diffusion decreased along the center. In addition to DMSOd, three dimethyl sulfides showed significant correlation with Chl-a. The results show that phytoplankton biomass is the key factor affecting the distribution of organic sulphide production in the East China Sea. The sea and air flux of DMS in the East China Sea in summer is between 0.93 渭 mol/(m~2 路d and 101.02 渭 mol/(m~2 路d). The mean 卤standard deviation was 18.13 卤21.42 渭 mol/(m~2 路dan.The contribution rate of sulfur release from the East China Sea to nss-SO4C2-2 was only 2.2% in summer. It is shown that anthropogenic emission is the main source of nss-SO4 ~ (2) in atmospheric aerosols in the East China Sea.
【作者单位】：中国海洋大学化学化工学院;海洋国家实验室海洋生态与环境科学功能实验室;
【基金】：国家自然科学基金项目(41576073,41306069,41320104008) 山东省博士基金(BS2013HZ011) 中央高校基本科研项目自主基金(201513049) 山东省“泰山学者”建设工程专项
【分类号】：P732.6;X513
【正文快照】： 二甲基硫(DMS)是海洋中最重要、含量最丰富的挥发性生源硫化物[1],每年大约28.1(17.6~34.4)Tg S从海洋进入大气[2],占海洋硫通量的90%以上,它是连接着海洋-大气-陆地之间硫循环的桥梁,被认为在全球硫循环和气候变化中发挥着举足轻重的作用.DMS在大气中被氧化成为SO2、甲基磺

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