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中文摘要：
以胶州湾及青岛近海为研究区域,利用吹扫-捕集气相色谱法研究了二甲基硫（DMS）和二甲巯基丙酸（DMSP,分为溶解态DMSPd和颗粒态DMSPp）在微表层与次表层中的浓度以及它们在微表层中的富集行为。结果表明,DMS、DMSPd和DMSPp在微表层中的浓度高于次表层,它们在微表层中的富集因子分别为1.17、1.84和1.51。研究发现,DMS及DMSPp浓度与叶绿素a（Chl-a）浓度有很好的相关性,但它们的周日变化与Chl-a并不完全同步。DMS/Chl-a和DMSPp/Chl-a的比值在次表层和微表层分别为4.35、13.47mmol/g和3.99、15.88mmol/g。胶州湾及青岛近海生态环境受人为活动干扰严重,使本海域DMS含量较高,从而贡献出较大的DMS海-气通量。
英文摘要：
With the gas-stripping chromatographic method, we determined the concentrations of DMS, DMSPd, and DMSPp in the surface microlayer and the corresponding subsurface waters of Jiaozhou Bay and Qingdao coast in situ, and calculated their enrichment factors in the microlayer. The concentrations of DMS, DMSPd and DMSPp in the microlayer were obviously higher relative to those in the subsurface water, with enrichment factors of 1.17, 1.84, and 1.51, respec- tively. Linear regression analysis showed that the concentrations of DMS and DMSPp were strongly correlated with the levels of Chl-a, though their diel variations were not tightly coupled in time with Chl-a. The ratios of DMS/Chl-a and DMSPp/Chl-a, respectively, were 3.99 and 15.88 mmol/g in the microlayer and 4.35 and 13.47 mmol/g in the subsurface water. The ecological environment is highly disturbed by human activities in Jiaozhou Bay and Qingdao coastal water, resulting in high DMS concentrations and then contributing to larger sea-to-air fluxes of DMS.
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