挪威海和格陵兰海海水DMS分布特征及影响因素研究

厉丞烜; 王保栋; 杨桂朋

doi:10.3969/j.issn.0253-4193.2015.08.002

挪威海和格陵兰海海水DMS分布特征及影响因素研究

doi: 10.3969/j.issn.0253-4193.2015.08.002

1.
国家海洋局第一海洋研究所海洋生态研究中心, 山东青岛 266061
2.
中国海洋大学化学化工学院, 山东青岛 266100

基金项目: 国家自然科学基金(41106071,41320104008);国家海洋局青年海洋科学基金(2012503);国家海洋局第一海洋研究所基本科研业务费专项基金(GY02-2011T01);2013年留学人员科技活动择优自助项目(02648)。

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出版历程
- 收稿日期: 2014-07-16
- 修回日期: 2015-05-12

Spatial distributions of Dimethylsulfide (DMS) and influencing factors in the Norwegian and Greenland Seas during summer

1.
Research Center for Marine Ecology, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China

摘要

摘要: 于2012年7—9月现场测定了北极挪威海和格陵兰海区域海水二甲基硫(DMS)及其前体物质二甲巯基丙酸内盐(DMSP,分溶解态DMSPd和颗粒态DMSPp)的含量,研究了其空间分布格局及其影响因素,探讨了表层海水DMS的生物周转和去除途径。结果表明,表层海水DMS、DMSPd和DMSPp的平均浓度分别为5.36 nmol/L、15.63 nmol/L 和96.73 nmol/L,受挪威海流和北极深层水影响,表层海水二甲基硫化物浓度呈现出由低纬度向高纬度海域递减的趋势。DMSPd和DMSPp浓度与Chl a浓度均有显著的相关性,说明浮游植物生物量是影响挪威海和格陵兰海二甲基硫化物生产的重要因素。表层海水DMS生物生产和消费速率平均值分别为18.19 nmol/(L·d)、15.67 nmol/(L·d)。DMS微生物周转时间变化范围为0.03~1.80 d,平均值为0.49 d,DMS海-气周转时间是微生物消费时间的90倍,说明夏季挪威海和格陵兰海表层海水中DMS微生物消费过程是比海-气扩散更具优势的去除机制。
- 二甲基硫 /
- 二甲巯基丙酸内盐 /
- 浓度分布 /
- 生物周转 /
- 挪威海和格陵兰海
Abstract: The dimethylsulfide (DMS), dissolved and particulate dimethylsulfoniopropionate (DMSPd and DMSPp) concentrations were determined in the Norwegian and Greenland Seas during summer of 2012. Surface DMS, DMSPd and DMSPp concentrations in the study area increased significantly from high latitudes to low latitudes, with the average values of 5.36, 15.63 and 96.73 nmol/L, respectively. Moreover, the biological production and consumption rates of DMS were estimated during the cruise, with the average values of 18.19 and 15.67 nmol/(L·d), respectively. Our results showed that the spatial variation of chlorophyll a was consistent with that of DMSPd and DMSPp concentrations, suggesting that phytoplankton biomass might play an important role in controlling the distribution of DMSP in the study area. In the surface water, the biological turnover time of DMS varied from 0.03 to 1.8 days, with an average of 0.49 days, which was about 90-fold faster than the mean DMS sea-air turnover time (28.8 days). Thus, the main sink of DMS in the surface water appears to be microbial consumption.
- dimethylsulfide /
- dimethylsulfoniopropionate /
- distribution /
- biological turnover /
- Norwegian and Greenland Seas

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