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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)。
In October 2012, the concentration distribution of dimethyl sulfide (DMS) and its precursors dimethyldithiopropionate inner salt (DMSP) and dissolved free methionine (DF Met) in the surface seawater of the East China Sea were studied the study. The results show that the concentrations of silicate (SiO 3 -Si), dissolved inorganic nitrogen (DIN) and phosphate (PO 4 -P) in the surface seawater of the East China Sea in autumn fall from 0.11 to 1.76, from 0.08 to 0.56 and from 0.013 to 0.054 mg / L, with the average values of 0.50 ± 0.36, 0.19 ± 0.11 and 0.024 ± 0.0098 mg / L, and the high value area of nutrient concentration appeared in the upwelling area in the southwestern East China Sea. The concentrations of DMS, DMSP and DF Met in surface seawater were 0.47 ~ 6.46, 9.44 ~ 55.57 and 3.48 ~ 14.42 nmol / L, with the average values of 3.10 ± 1.93,28.05 ± 14.17 and 6.19 ± 2.30 nmol / L, respectively. The distribution of DMS and DMSP is basically the same as the distribution of chlorophyll a (Chl a), showing a tendency of near-shore descent to distant sea. The ranges of DMS / Chl a and DMSP / Chl a in the investigated waters ranged from 2.59 to 27.66 and from 27.37 to 103.34 mmol / g, with mean values of 11.46 ± 5.02 and 65.08 ± 23.41 mmol / g, respectively, The phytoplankton dominance findings are consistent. In addition, the sea-atmosphere fluxes of DMS in the surface water of the autumn East China Sea ranged from 0.89 to 105.50μmol / (m 2 · d) with an average of 35.65 ± 31.53μmol / (m 2 · d).