黄、渤海二甲基硫化物的浓度分布与迁移转化速率研究

闫士博; 靳娜; 张洪海; 曹晓燕; 杨桂朋

doi:10.3969/j.issn.0253-4193.2018.10.009

黄、渤海二甲基硫化物的浓度分布与迁移转化速率研究

doi: 10.3969/j.issn.0253-4193.2018.10.009

1.
中国海洋大学化学化工学院, 山东青岛 266100
2.
中国海洋大学化学化工学院, 山东青岛 266100;青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室, 山东青岛 266237

基金项目: 国家自然科学基金（41306069）；中央高校基本科研业务费专项项目（201762030，201762031）。

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出版历程
- 收稿日期: 2018-04-22
- 修回日期: 2018-06-06

Study on concentrations distributions of dimethylated sulfur compounds and their transformation rates in the Yellow Sea and the Bohai Sea

1.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
2.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China

摘要

摘要: 于2015年8-9月对黄、渤海海域进行现场调查，研究了海水中二甲基硫（DMS）、β-二甲巯基丙酸内盐（DMSP）、二甲亚砜（DMSO）的浓度分布、相互关系及影响因素，测定了DMS的生物生产与消耗、光化学氧化和海-气扩散速率，对DMS的迁移转化速率进行综合评价。结果表明：表层海水中DMS、溶解态DMSP（DMSPd）、颗粒态DMSP（DMSPp）、溶解态DMSO（DMSOd）和颗粒态DMSO（DMSOp）浓度的平均值分别为（6.12±3.01）nmol/L、（6.03±3.45）nmol/L、（19.47±9.15）nmol/L、（16.85±8.34）nmol/L和（14.37±7.47）nmol/L，整体呈现近岸高远海低，表层高底层低的趋势。DMS、DMSPd和DMSOp浓度与叶绿素（Chl a）浓度存在显著的相关性。表层海水中DMS光氧化速率顺序为：k_UVA > k_UVB > k_可见，其中UVA波段占光氧化的70.8%。夏季黄、渤海微生物消耗、光氧化及海-气扩散对DMS去除的贡献率分别为32.4%、34.5%和33.1%，表明3种去除途径作用相当。黄、渤海DMS海-气通量变化范围为0.79~48.45 μmol/（m²·d），平均值为（11.87±11.35）μmol/（m²·d）。
- 二甲基硫化物 /
- 分布 /
- 光化学氧化 /
- 迁移转化 /
- 海-气通量 /
- 黄海、渤海
Abstract: Concentrations distributions of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) as well as their influencing factors were studied in the Yellow Sea and Bohai Sea from August to September, 2015. The rates of biological production and microbial consumption, photochemical oxidation and sea-to-air diffusion of DMS were also determined, to evaluate the migration and transformation rates of DMS. The mean concentrations of DMS, dissolved DMSP (DMSPd), particulate DMSP (DMSPp), dissolved DMSO (DMSOd) and particulate DMSO (DMSOp) in the surface water were (6.12±3.01) nmol/L, (6.03±3.45) nmol/L, (19.47±9.15) nmol/L, (16.85±8.34) nmol/L and (14.37±7.47) nmol/L, respectively. Their distributions presented similar tendency to decrease from inshore to offshore, from the surface to the bottom. The concentrations of DMS, DMSPd and DMSOp were significantly correlated with the concentrations of Chl a. The order of photochemical oxidation rates of DMS was k_UVA > k_UVB > k_vis in the surface water, and UVA accounted for 70.8% of the total photolysis. The average contribution of microbial consumption, photochemical oxidation and sea-to-air diffusion were 32.4%, 34.5% and 33.1%, respectively, which were basically equivalent to DMS removal. In addition, the sea-to-air flux of DMS ranged from 0.79 μmol/(m²·d) to 48.45 μmol/(m²·d) from the Yellow Sea and the Bohai Sea, with the mean value of (11.87±11.35) μmol/(m²·d).
- dimethylated sulfur compounds /
- distribution /
- photochemical oxidation /
- migration and transformation /
- sea-to-air flux /
- Yellow Sea

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