期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 488, 期 -, 页码 157-167出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2014.04.074
关键词
Dimethylsulfide (DMS); Dimethylsulfoniopropionate (DMSP); Phytoplankton; Methanesulfonic; South Yellow Sea; East China Sea
资金
- National Natural Science Foundation of China [41030858, 41320104008]
- National Natural Science Foundation for Creative Research Groups [41221004]
- Ministry of Education of China
Spatial distributions of biogenic sulfur compounds including dimethylsulfide (DMS), dissolved and particulate dimethylsulfoniopropionate (DMSPd and DMSPp) were investigated in the South Yellow Sea (SYS) and the East China Sea (ECS) in July 2011. The concentrations of DMS and DMSPp were significantly correlated with the levels of chlorophyll a in the surface water. Simultaneously, relatively high ratio values of DMSP/chlorophyll a and DMS/chlorophyll a occurred in the areas where the phytoplankton community was dominated by dinoflagellates. The DMSPp and chlorophyll a size-fractionation showed that larger nanoplankton (5-20 pm) was the most important producer of DMSPp in the study area. The vertical profiles of DMS and DMSP were characterized by a maximum at the upper layer and the bottom concentrations were also relatively higher compared with the overlying layer of the bottom. In addition, a positive linear correlation was observed between dissolved dimethylsulfoxide (DMS0d) and DMS concentrations in the surface waters. The sea-to-air fluxes of DMS in the study area were estimated to be from 0.03 to 10235 mu mol m(-2) d(-1) with a mean of 16.73 mu mol d(-1) and the contribution of biogenic non-sea-salt SO42- (nss-SO42-) to the measured total nss-SO42- in the atmospheric aerosol over the study area varied from 1.42% to 30.98%, with an average of 8.2%. (C) 2014 Elsevier B.V. All rights reserved.
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