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中文摘要：
于2013年10~11月现场测定了东海中二甲基硫（DMS）及其前体物质二甲巯基丙酸内盐（DMSP,分为溶解态DMSPd和颗粒态DMSPp）的含量,研究其水平分布特征、DMSPp的粒径分布及DMSPd的降解速率,并对DMS的海-气交换通量进行了探讨。研究结果表明,表层海水中DMS、DMSPd和DMSPp的浓度平均值分别为（4.84±0.40）、（5.84±0.93）和（13.01±0.52）nmol·L-1。海水中DMSPd的降解速率在2.59~16.36nmol·L-1·d-1之间,平均值为（6.78±0.84）nmol·L-1·d-1。调查海域范围内,小型浮游植物（〉20μm）是DMSPp和叶绿素a（Chl a）重要贡献者。此外,秋季东海表层海水DMS的海-气交换通量为0.66~31.73μmol·m-2·d-1,平均值为（11.63±0.71）μmol·m-2·d-1。
英文摘要：
The concentrations of dimethylsulfide（DMS）and dimethylsulfoniopropionate（DMSP）in the East China Sea were measured during October-November 2013 to study their horizontal distributions,size distribution of particle DMSP（DMSPp）and degradation rate of dissolved DMSP（DMSPd）.The sea-to-air flux of DMS were also estimated.The concentrations of DMS,DMSPd and DMSPp varied from 1.91to8.59,from 1.29 to 22.36 and from 2.92 to 26.51nmol·L-1,respectively,with average values of（4.84 ±0.40）,（5.84 ± 0.93）and（13.01 ± 0.52）nmol·L-1.The degradation rate of DMSPd ranged from2.59 to 16.36nmol·d-1,with an average of（6.78 ± 0.84）nmol·d-1.In addition,small nanophytoplankton（20〉μm）contributed to the majority of DMSPp and chlorophyll ain the study area.The sea-toair fluxs of DMS in the study period ranged from 0.66 to 31.73μmol·m-2·d-1,with an average of（11.63 ± 0.71）μmol·m-2·d-1.
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