秋季东海二甲基有机硫化物的浓度分布与影响因素

发布时间：2018-01-23 02:42

本文关键词： 二甲基硫二甲巯基丙酸内盐蛋氨酸浓度分布海-气通量东海　出处：《海洋环境科学》2017年01期 　论文类型：期刊论文

【摘要】：于2012年10月对中国东海表层海水中二甲基硫(DMS)及其前体物质二甲巯基丙酸内盐(DMSP)、溶解自由态蛋氨酸(DF Met)的浓度分布及影响因素进行了研究。分析结果表明,秋季东海表层海水中硅酸盐(SiO_3-Si)、溶解无机氮(DIN)、磷酸盐(PO4-P)浓度变化范围分别为0.11~1.76、0.08~0.56和0.013~0.054 mg/L,平均值为0.50±0.36、0.19±0.11和0.024±0.0098 mg/L,且东海西南部上升流区出现营养盐浓度的高值区。表层海水中DMS、DMSP和DF Met的浓度分别在0.47~6.46、9.44~55.57和3.48~14.42 nmol/L之间,平均值分别为3.10±1.93、28.05±14.17和6.19±2.30 nmol/L。DMS、DMSP的水平分布与叶绿素a(Chl a)分布基本一致,呈现出近岸向远海降低的趋势。所调查海域的DMS/Chl a和DMSP/Chl a比值变化范围分别为2.59~27.66和27.37~103.34 mmol/g,平均值分别为11.46±5.02和65.08±23.41 mmol/g,与该海域硅藻为浮游植物优势种的调查结果相一致。此外,秋季东海表层海水DMS的海-气通量介于0.89~105.50μmol/(m~2·d)之间,平均值为35.65±31.53μmol/(m~2·d)。
[Abstract]:In October 2012, DMS and its precursor DMSPs in the surface seawater of the East China Sea were studied. The concentration distribution of dissolved free methionine methionine (DF) and its influencing factors were studied. The results showed that silicate SiO3-SiO-2 was found in the surface seawater of the East China Sea in autumn. The concentration of dissolved inorganic nitrogen (DINA) and phosphate (PO4-P) varied from 0.11 to 1.76, 0.08, 0.56 and 0.013 to 0.054 mg/L, respectively. The mean values were 0.50 卤0.36 mg/L, 0.19 卤0.11 and 0.024 卤0.0098 mg/L, respectively. In the upwelling area of the southwest of the East China Sea, there was a high value area of nutrient concentration. The concentrations of DMSDMSP and DF Met in the surface sea water were 0.47 ~ 6.46, respectively. The average value was 3.10 卤1.93 between 9.44 ~ 55.57 and 3.48 ~ 14.42 nmol/L. The horizontal distribution of 28.05 卤14.17 and 6.19 卤2.30 nmol / L DMS-DMSP was basically consistent with that of chlorophyll a Chl a. The DMS/Chl a and DMSP/Chl of the investigated sea areas showed a decreasing trend towards the far sea. The range of a ratio was 2.59 ~ 27.66 and 27.37 ~ 103.34 mmol/g, respectively. The average values were 11.46 卤5.02 and 65.08 卤23.41 mmol / g, respectively. In autumn, the sea-air flux of DMS in the surface sea of the East China Sea is between 0.89 渭 mol/(m~2 路d and 105.50 渭 mol/(m~2 路d. The average value was 35.65 卤31.53 渭 mol/(m~2 路dl.
【作者单位】：中国海洋大学化学化工学院;
【基金】：国家自然科学基金项目(41306069,41576073) 山东省优秀中青年科学家奖励基金(BS2013HZ011) 教育部“长江学者”奖励计划项目山东省“泰山学者”建设工程专项项目
【分类号】：P734
【正文快照】： 二甲基硫(dimethylsulfide,DMS)是海水中最重要的、含量最丰富的还原态挥发性生源硫化物[1],在大气化学及全球硫循环中起到重要作用[2]。DMS由海水释放到大气中后,氧化生成甲基磺酸盐(MSA)和二甲亚砜(dimethylsulfoxide,DMSO)等,并进一步生成非海盐硫酸盐(nss-SO2-4)气溶胶,后

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