Abstract
Dimethylsulfide (DMS) measurements in the seawater of the subtropical and the temperate western Indian Ocean were conducted for the first time from 3 December to 20 December 1997. In total, 443 surface seawater DMS determinations were performed between 24°–49° S and 50° E–77° E with a frequency of 1 sample every 10 km. An important spatial variability was observed in seawater DMS concentrations with values ranging from 0.9 to 35.8 nM. DMS maxima coincided in most cases with thermal fronts and were in reasonable agreement with mean pigment figures obtained from satellite observations. The deduced DMS fluxes are consistent with long-term observations of atmospheric DMS and rainwater concentrations of nss- SO4= and MSA measured at Amsterdam island (37° S, 77° E); then account for the differences observed in atmospheric DMS concentrations between Amsterdam island and Cape Grim, Indian Ocean monitoring stations.
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Andreae, M. O., Elbert, W., and de Mora, S. J., 1995: Biogenic sulfur emissions and aerosols over the tropical South atlantic: 3. Atmospheric dimethylsulfide, aerosols and cloud condensation nuclei, J. Geophys. Res. 100(D6), 11,335–11,356.
Ayers, G. P. and Ivey, J. P. 1990: Methanesulfonate in rainwater at Cape Grim, Tasmania, Tellus 40B, 297–307.
Ayers G. P., Ivey. J. P., and Gillett R. W., 1991: Coherence between seasonal cycles of dimethyl sulphide. Methanesulphonate and sulphate in marine air, Nature 349, 404–406.
Ayers, G. P., Bentley, S. T., Ivey, J. P., and Forgan, B. W., 1995: Dimethylsulfide in marine air at Cape Grim, 41° S, J. Geophys. Res. 100, 21013–21021.
Baboukas, E., Sciare, J., Kouvarakis, G., Nguyen, B. C., Mihalopoulos, N., Kanakidou, M., 1996: Processes controlling the composition of precipitation in the Southern Indian Ocean, Proceedings of the 7th European Symposium on Physicochemical Behavior of Atmospheric Pollutants on the Oxidizing Capacity of the Troposphere, Venice, Italy, 2-4 October 1996.
Bates, T. S., Cline, J. D., Gammon, R. H., and Kelly-Hansen, S. R., 1987: Regional and seasonal variation of the flux of oceanic dimethylsulfide to the atmosphere, J. Geophys. Res. 92, 2930–2938.
Bates, T. S. et al., 1998: Processes controlling the distribution of aerosol particles in the lower marine boundary layer during the First Aerosol Characterization Experiment (ACE 1), J. Geophys. Res. 103(D13), 16,369–36,383.
Belkin, I. M. and Gordon A. L., 1996: Southern Ocean fronts from the Greenwich Meridian to Tasmania, J. Geophys. Res. 101(C2), 3675–3696.
Belviso, S., Buat-Menard, P., Putaud, J. P., Nguyen, B. C., Claustre, H., and Neveux, J., 1993: Size distribution of dimethylsulfoniopropionate (DMSP) in areas of the tropical northeastern Atlantic Ocean and Mediterranean Sea, Mar. Chem. 44, 55–71.
Belviso, S., Mihalopoulos, N., and Sciare, J., 1998: First Atlantic meridional transect of sea surface DMS concentration along 30° W with 15 km of spatial resolution, Paper presented at EGS XXIII General Assembly, Nice, 20–24 April 1998.
Berresheim, H., 1987: Biogenic sulfur emissions from the Subantarctic and Antarctic Oceans, J. Geophys. Res. 92, 13245–13262.
Berresheim, H., Andreae, M. O., Ayers, G. P., Gillett, R. W., Merrill, J. T., Davis, V. J., and Chameides, W. L., 1990: Airborne measurements of dimethylsulfide, sulfur dioxide, and aerosol ions over the southern ocean south of Australia, J. Atmos. Chem. 10, 341–370.
Charlson, R. J., Lovelock, J. E., Andreae, M. O., Warren, S. G., 1987: Oceanic phytoplank-ton, atmospheric sulphur, cloud albedo and climate, Nature 326, 655–661.
Holliday, N. P. and Read, J. F., 1998: Surface oceanic fronts between Africa and Antarctica, Deep-Sea Res. I 45, 217–238.
Holligan, P., Turner, S., and Liss, P. S., 1987: Measurements of dimethyl sulphide in frontal regions, Continental Shelf Research 2, 213–224.
Hynes, A. J., Wine, P. H., Semmes, D. H., 1986: Kinetics and mechanisms of OH reactions with organic sulfides, J. Phys. Chem. 90, 4148–4156.
Kanakidou, M., Dentener, F., and Crutzen, P., 1995: A global three-dimensional study of the fate of HCFCs and HFC-134a in the troposphere, J. Geophys. Res. 100, 18781–18801.
Liss, P. S. and Slater, 1974: Flux of gases across the air-sea interface, Nature 247, 181–184.
Liss, P. S. and Merlivat, L., 1986: The Role of Air-Sea Exchange in Geochemical Cycling, edited by P. Buat-Ménard, D. Reidel Pub. Co., Dordrecht, pp. 113–127.
Mihalopoulos, N., Putaud, J. P., and Nguyen, B. C., 1993: Seasonal variation of methanesulfonic acid in precipitation at Amsterdam island in the southern Indian ocean, Atmos. Environ. 27A, 1909–1916.
Mihalopoulos, N., 1989: Contribution a l'etude du cycle biogeochimique de l'oxysulfure de carbone dans l'atmosphere, Ph.D. Thesis, University of Paris 7, p. 197.
Mihalopoulos, N., Sciare, J., Baboukas, E., and Nguyen, B. C., 1998: Short-term variability of dimethylsulfide, its oxidation products and Aitken nuclei in the remote marine atmosphere (Amsterdam island, southern Indian ocean), Posters presented for the Joint International Symposium on Global Atmospheric Chemistry, Seattle, U.S.A., 19-25 August 1998.
Moody, J. L., Psyenny, A. P. P., Gaudry, A., Keene, W. C., Galloway, J. N., and Polian, G., 1991: Precipitation composition and its variability in the southern Indian Ocean: Amsterdam island, 1980–1987, J. Geophys. Res. 96, 20769–20786.
Nguyen, B. C., Bonsang, B., and Gaudry, A., 1983: The role of the ocean in the global atmospheric sulfur cycle, J. Geophys. Res. 88, 10903–10914.
Nguyen, B. C., Mihalopoulos, N., and Belviso, S., 1990: Seasonal variation of atmospheric dimethylsulfide at Amsterdam island in the southern Indian Ocean, J. Atmos. Chem. 11, 123–143.
Park, Y. H., Gamberoni, L., and Charriaud, E., 1993: Frontal structures, water masses, and circulation in the Crozet basin, J. Geophys. Res. 98, 12361–12385.
Saltzman, E. E., King, D. B., Holmen, K., and Leck, C., 1993: Experimental determination of the diffusion coefficient of dimethylsufide in water, J. Geophys. Res. 98, 16,481–16,486.
Staubes-Diedrich, R., 1992: Verteilung von Dimethylsulfid, Carbonylsulfid und Schwefelkohlenstoff in ozean und mariner Atmosphäre, Thesis, Frankfurt am Main.
Smethie, W. M., Takahashi, T., Chipman, D. W., 1985: Gas exchange and CO2 flux in the tropical Atlantic Ocean determined from 222Rn and pCO2 measurements, J. Geophys. Res. 90(C4), 7005–7022.
Turner, S. M., Malin, G., Nightingale, P. D., and Lis, P. S., 1996: Seasonal variation of dimethyl sulphide in the North sea and an assessment of fluxes to the atrmosphere, Mar. Chem. 54, 245–262.
Wanninkhof, R., 1992: Relationship between gas exchange and wind speed over the ocean, J. Geophys. Res. 97, 7373–7381.
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Sciare, J., Mihalopoulos, N. & Nguyen, B.C. Summertime Seawater Concentrations of Dimethylsulfide in the Western Indian Ocean: Reconciliation of Fluxes and Spatial Variability with Long-Term Atmospheric Observations. Journal of Atmospheric Chemistry 32, 357–373 (1999). https://doi.org/10.1023/A:1006132001945
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DOI: https://doi.org/10.1023/A:1006132001945