Journal
ATMOSPHERIC ENVIRONMENT
Volume 43, Issue 13, Pages 2196-2203Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2009.01.011
Keywords
Dimethylsulfide; Methanesulfonic acid; Non-sea-salt sulfate; Sea-to-air flux; North Yellow Sea
Funding
- National Natural Science Foundation of China [40476034, 40525017, 40490265]
- Science and Technology Key Project of Shandong Province [2006GG2205024]
- Taishan Mountain Scholar Construction Engineering Special Fund of Shandong Province, China
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Seawater, atmospheric dimethylsulfide (DMS) and aerosol compounds, potentially linked with DMS oxidation, such as methanesulfonic acid (MSA) and non-sea-salt sulfate (nss-SO(4)(2-)) were determined in the North Yellow Sea, China during July-August, 2006. The concentrations of seawater and atmospheric DMS ranged from 2.01 to 11.79 nmol l(-1) and from 1.68 to 8.26 nmol m(-3), with average values of 6.20 nmol l(-1) and 5.01 nmol m(-3), respectively. Owing to the appreciable concentration gradient, DMS accumulated in the surface water was transferred into the atmosphere, leading to a net sea-to-air flux of 6.87 mu mol m(-2) d(-1) during summer. In the surface seawater, high DMS values corresponded well with the concurrent increases in chlorophyll a levels and a significant correlation was observed between integrated DMS and chlorophyll a concentrations. In addition, the concentrations of MSA and nSS-SO(4)(2-) measured in the aerosol samples ranged from 0.012 to 0.079 mu g m(-3) and from 3.82 to 11.72 mu g m(-3), with average values of 0.039 and 7.40 mu g m(-3), respectively. Based on the observed MSA, nss-SO(4)(2-) and their ratio, the relative biogenic sulfur contribution was estimated to range from 1.2% to 11.5%, implying the major contribution of anthropogenic source to sulfur budget in the study area. (C) 2009 Elsevier Ltd. All rights reserved.
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