References

Biogeosciences

1726-4189

Copernicus Publications

Göttingen, Germany

10.5194/bg-6-1927-2009

Testing the relationship between the solar radiation dose and surface DMS concentrations using in situ data

Miles

C. J.

¹ Bell

T. G.

¹ Lenton

T. M.

Laboratory for Global Marine and Atmospheric Chemistry (LGMAC), School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK

28 09 2009

6 9 1927 1934

2009

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The proposed strong positive relationship between dimethylsulphide (DMS) concentration and the solar radiation dose (SRD) received into the surface ocean is tested using data from the Atlantic Meridional Transect (AMT) programme. In situ, daily data sampled concurrently with DMS concentrations is used for the component variables of the SRD (mixed layer depth, MLD, surface insolation, I0, and a light attenuation coefficient, k) to calculate SRDinsitu. This is the first time in situ data for all of the components, including k, has been used to test the SRD-DMS relationship over large spatial scales. We find a significant correlation (ρ=0.55 n=65 p<0.01) but the slope of this relationship (0.006 nM/W m−2) is less than previously found at the global (0.019 nM/W m−2) and regional scales (Blanes Bay, Mediterranean, 0.028 nM/W m−2; Sargasso Sea 0.017 nM/W m−2). The correlation is improved (ρ=0.74 n=65 p<0.01) by replacing the in situ data with an estimated I0 (which assumes a constant 50% removal of the top of atmosphere value; 0.5×TOA), a MLD climatology and a fixed value for k following previous work. Equally strong, but non-linear relationships are also found between DMS and both in situ MLD (ρ=0.61 n=65 p<0.01) and the estimated I0 (ρ=0.73 n=65 p<0.01) alone. Using a satellite-retrieved, cloud-adjusted surface UVA irradiance to calculate a UV radiation dose (UVRD) with a climatological MLD also provides an equivalent correlation (ρ=0.67 n=54 p<0.01) to DMS. With this data, MLD appears the dominant control upon DMS concentrations and remains a useful shorthand to prediction without fully resolving the biological processes involved. However, the implied relationship between the incident solar/ultraviolet radiation (modulated by MLD), and sea surface DMS concentrations, is critical for closing a climate feedback loop.

References 1

Anderson, T. R., Spall, S. A., Yool, A., Cipollini, P., Challenor, P. G., and Fasham, M. J. R.: Global fields of sea surface dimethylsulfide predicted from chlorophyll, nutrients and light, J. Marine Syst., 30, 1–20, 2001.

Andreae, M. O. and Crutzen, P. J.: Atmospheric aerosols: Biogeochemical sources and role in atmospheric chemistry, Science, 276, 1052–1058, 1997.

Aranami, K. and Tsunogai, S.: Seasonal and regional comparison of oceanic and atmospheric dimethylsulfide in the northern North Pacific: Dilution effects on its concentration during winter, J. Geophys. Res.-Atmos., 109(15), D12303 10.1029/2003JD004288, 2004.

Aumont, O., Belviso, S., and Monfray, P.: Dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) sea surface distributions simulated from a global three-dimensional ocean carbon cycle model, J. Geophys. Res.-Oceans, 107(C4), 3029, https://doi.org/10.1029/1999JC000111, 2002.

Ayers, G. P., Ivey, J. P., and Gillett, R. W.: Coherence between seasonal cycles of dimthyl sulphide, methansulphonate and sulphate in marine air, Nature, 349, 404–406, 1991.

Ayers, G. P. and Gillett, R. W.: DMS and its oxidation products in the remote marine atmosphere: implications for climate and atmospheric chemistry, J. Sea Res., 43, 275–286, 2000.

Bates, T. S., Lamb, B. K., Guenther, A., Dignon, J., and Stoiber, R. E.: Sulphur emissions to the atmosphere from natural sources, J. Atmos. Chem., 14, 315–337, 1992.

Bell, T. G., Malin, G., McKee, C. M., and Liss, P. S.: A comparison of dimethylsulphide (DMS) data from the Atlantic Meridional Transect (AMT) programme with proposed algorithms for global surface DMS concentrations, Deep-Sea Res. Pt. II, 53, 1720–1735, 2006.

Belviso, S., Bopp, L., Moulin, C., Orr, J. C., Anderson, T. R., Aumont, O., Chu, S., Elliott, S., Maltrud, M. E., and Simó, R.: Comparison of global climatological maps of sea surface dimethyl sulfide, Global Biogeochem. Cy., 18, GB3013, https://doi.org/10.1029/2003GB002193, 2004a.

Belviso, S., Moulin, C., Bopp, L., and Stefels, J.: Assessment of a global climatology of oceanic dimethylsulfide (DMS) concentrations based on SeaWiFS imagery (1998–2001), Can. J. Fish. Aquat. Sci., 61(5), 804–816, 2004b.

Belviso, S. and Caniaux, G.: A new assessment in North Atlantic waters of the relationship between DMS concentration and the upper mixed layer solar radiation dose, Global Biogeochem. Cy., 23, GB1014, https://doi.org/10.1029/2008GB003382, 2009.

Berresheim, H., Eisele, F. L., Tanner, D. J., McInnes, L. M., Ramseybell, D. C., and Covert, D. S.: Atmospheric sulpur chemistry and cloud condensation nuclei (CCN) concentrations over the Northeastern pacific coast, J. Geophys. Res.-Atmos., 98, 12701–12711, 1993.

Brimblecombe, P. and Shooter, D.: Photooxidation of dimethyl sulphide in aqueous solution, Mar. Chem., 19, 343–353, 1986.

Charlson, R. J., Lovelock, J. E., Andreae, M. O., and Warren, S. G.: Oceanic phytoplankton, atmospheric sulphur, cloud albedo and climate, Nature, 326, 655–661, 1987.

De Boyer Montégut, C. D., Madec, G., Fischer, A. S., Lazar, A., and Iudicone, D.: Mixed layer depth over the global ocean: An examination of profile data and a profile-based climatology, J. Geophys. Res.-Oceans, 109, C12003, https://doi.org/10.1029/2004JC002378, 2004.

Derevianko, G. J., Deutsch, C., and Hall, A.: On the relationship between ocean DMS and solar radiation, Geophys. Res. Lett, 36, L17606, https://doi.org/10.1029/2009GL039412, 2009.

Garcia-Pichel, F.: Solar ultraviolet and the evolutionary history of cyanobacteria, Origins Life Evol. B., 28, 321–347, 1998.

Häder, D. P., Kumar, H. D., Smith, R. C., and Worrest, R. C.: Aquatic ecosystems: effects of solar ultraviolet radiation and interactions with other climatic change factors, Photochem. Photobio. Sci., 2, 39–50, 2003.

Herman, J. R. and Celarier, E. A.: Earth surface reflectivity climatology at 340–380 nm from TOMS data, J. Geophys. Res.-Atmos., 102, 28003–28011, 1997.

Kniveton, D. R., Todd, M. C., Sciare, J., and Mihalopoulos, N.: Variability of atmospheric dimethylsulphide over the southern Indian Ocean due to changes in ultraviolet radiation, Global Biogeochem. Cy., 17(4), 1096, https://doi.org/10.1029/2003GB002033, 2003.

Sciare, J., Baboukas, E., and Mihalopoulos, N.: Short-term variability of atmospheric DMS and its oxidation products at Amsterdam Island during summer time, J. Atmos. Chem., 39, 281–302, 2001.

Siegel, D. A. and Michaels, A. F.: Quantification of non-algal light attenuation in the Sargasso Sea: Implications for biogeochemistry and remote sensing, Deep-Sea Res. Pt. II, 43, 321–345, 1996.

Simó, R. and Pedros-Alio, C.: Role of vertical mixing in controlling the oceanic production of dimethyl sulphide, Nature, 402, 396–399, 1999.

Simó, R.: Production of atmospheric sulfur by oceanic plankton: biogeochemical, ecological and evolutionary links, Trends Ecol. Evol., 16, 287–294, 2001.

Simó, R. and Dachs, J.: Global ocean emission of dimethylsulfide predicted from biogeophysical data, Global Biogeochem. Cy., 16(4), 1018, https://doi.org/10.1029/2001GB001829, 2002.

Slezak, D., Brugger, A., and Herndl, G. J.: Impact of solar radiation on the biological removal of dimethylsulfoniopropionate and dimethylsulfide in marine surface waters, Aquat. Microb. Ecol., 25, 87–97, 2001.

Steinke, M., Wolfe, G. V., and Kirst, G. O.: Partial characterisation of dimethylsulfoniopropionate (DMSP) lyase isozymes in 6 strains of Emiliania huxleyi, Mar. Ecol.-Prog. Ser., 175, 215–225, 1998.

Steinke, M., Malin, G., Gibb, S. W., and Burkill, P. H.: Vertical and temporal variability of DMSP lyase activity in a coccolithophorid bloom in the northern North Sea, Deep-Sea Res. Pt. II, 49, 3001–3016, 2002.

Sunda, W., Kieber, D. J., Kiene, R. P., and Huntsman, S.: An antioxidant function for DMSP and DMS in marine algae, Nature, 418, 317–320, 2002.

Tedetti, M. and Sempere, R.: Penetration of ultraviolet radiation in the marine environment. A review, Photochem. Photobiol., 82, 389–397, 2006.

Toole, D. A., Kieber, D. J., Kiene, R. P., Siegel, D. A., and Nelson, N. B.: Photolysis and the dimethylsulfide (DMS) summer paradox in the Sargasso Sea, Limnol. Oceanogr., 48, 1088–1100, 2003.

Toole, D. A. and Siegel, D. A.: Light-driven cycling of dimethylsulfide (DMS) in the Sargasso Sea: Closing the loop, Geopys. Res. Lett., 31, L09308, https://doi.org/10.1029/2004GL019581, 2004.

Toole, D. A., Slezak, D., Kiene, R. P., Kieber, D. J., and Siegel, D. A.: Effects of solar radiation on dimethylsulfide cycling in the western Atlantic Ocean, Deep-Sea Res. Pt.-I, 53, 136–153, 2006.

Vallina, S. M. and Simó, R.: Strong relationship between DMS and the solar radiation dose over the global surface ocean, Science, 315, 506–508, 2007.

Vallina, S. M., Simó, R., Gassó, S., De Boyer-Montégut, C., del Río, E., Jurado, E., and Dachs, J.: Analysis of a potential "solar radiation dose-dimethylsulfide-cloud condensation nuclei" link from globally mapped seasonal correlations, Global Biogeochem. Cy., 21, GB2004, https://doi.org/10.1029/2006GB002787, 2007.