| 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、13.47 mmol/g 和 3.99、15.88 mmol/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。
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| 关键词: 二甲基硫, 二甲巯基丙酸, 微表层, 富集因子, 胶州湾, 青岛近海 |
| DOI：10.11693/hyhz201005004004 |
| 分类号: |
| 基金项目:国家杰出青年科学基金资助项目, 40525017号; 国家自然科学基金资助项目, 40476034号; 国家自然科学基金重点资助项目, 41030858 号以及山东省科技攻关资助项目, 2006GG2205024 号。 |
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| DISTRIBUTION OF DIMETHYLSULFIDE (DMS) AND DIMETHYLSULPHONIOPROPIONATE (DMSP) IN THE MICROLAYER AND SUBSURFACE WATER IN JIAOZHOU BAY AND QINGDAO COASTAL WATER |
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ZHANG Hong-Hai, YANG Gui-Peng
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Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College and Chemical Engineering, Ocean University of China
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| Abstract: |
| 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, respectively. 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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| Key words: Dimethylsulfide, Dimethylsulphoniopropionate, Sea-surface microlayer, Enrichment factor, Jiaozhou Bay, Qingdao Coastal Water |
