Abstract
A continuous record of dimethylsulfoxide (DMSO) in rainwater was performed at Amsterdam island (37°S 77°E) from December 1995 to February 1997. Eighty one rainwater samples were collected. DMSO, methanesulfonic acid (MSA), the major anions, and cations were analyzed. DMSO concentrations ranged from 7.0 to 369 nM, with a distinct seasonal variation. The mean concentrations during the summer and the winter periods were 90 nM and 25.6 nM respectively. The observed DMSO seasonal cycle is in line with the observations of DMS in the atmosphere and MSA in rainwater, measured simultaneously during the reported period. However, the summer to winter ratio of DMSO is significantly lower than that observed for DMS and MSA. The DMSO to MSA ratio and its observed seasonal variability are also presented. The implications on the biogenic sulfur cycle are discussed.
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Sciare, J., Baboukas, E., Hancy, R. et al. Seasonal Variation of Dimethylsulfoxide in Rainwater at Amsterdam Island in the Southern Indian Ocean: Implications on the Biogenic Sulfur Cycle. Journal of Atmospheric Chemistry 30, 229–240 (1998). https://doi.org/10.1023/A:1005983625947
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DOI: https://doi.org/10.1023/A:1005983625947