An updated climatology of surface dimethlysulfide concentrations and emission fluxes in the global ocean

Type Article
Date 2011-01
Language English
Author(s) Lana A.1, Bell T. G.2, Simo R.1, Vallina S. M.5, Ballabrera-Poy J.1, Kettle A. J.6, Dachs J.4, Bopp L.3, Saltzman E. S.7, Stefels J.8, Johnson J. E.9, Liss P. S.2
Affiliation(s) 1 : CSIC, ICM, E-08003 Barcelona, Catalonia, Spain.
2 : Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England.
3 : CEA, UVSQ, CNRS, LSCE,IPSL,CE Saclay, F-91191 Gif Sur Yvette, France.
4 : CSIC, IDAEA, E-08034 Barcelona, Catalonia, Spain.
5 : MIT, EAPS, Cambridge, MA 02139 USA.
6 : SUNY Coll Oswego, Dept Earth Sci, Oswego, NY 13126 USA.
7 : Univ Calif Irvine, Sch Phys Sci, Irvine, CA 92697 USA.
8 : Univ Groningen, Lab Plant Physiol, NL-9751 NN Haren, Netherlands.
9 : Univ Washington, JISAO, Seattle, WA 98195 USA.
Source Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2011-01 , Vol. 25 , N. 1 , P. GB1004, (17p.)
DOI 10.1029/2010GB003850
WOS© Times Cited 329
Abstract The potentially significant role of the biogenic trace gas dimethylsulfide (DMS) in determining the Earth's radiation budget makes it necessary to accurately reproduce seawater DMS distribution and quantify its global flux across the sea/air interface. Following a threefold increase of data (from 15,000 to over 47,000) in the global surface ocean DMS database over the last decade, new global monthly climatologies of surface ocean DMS concentration and sea-to-air emission flux are presented as updates of those constructed 10 years ago. Interpolation/extrapolation techniques were applied to project the discrete concentration data onto a first guess field based on Longhurst's biogeographic provinces. Further objective analysis allowed us to obtain the final monthly maps. The new climatology projects DMS concentrations typically in the range of 1-7 nM, with higher levels occurring in the high latitudes, and with a general trend toward increasing concentration in summer. The increased size and distribution of the observations in the DMS database have produced in the new climatology substantially lower DMS concentrations in the polar latitudes and generally higher DMS concentrations in regions that were severely undersampled 10 years ago, such as the southern Indian Ocean. Using the new DMS concentration climatology in conjunction with state-of-the-art parameterizations for the sea/air gas transfer velocity and climatological wind fields, we estimate that 28.1 (17.6-34.4) Tg of sulfur are transferred from the oceans into the atmosphere annually in the form of DMS. This represents a global emission increase of 17% with respect to the equivalent calculation using the previous climatology. This new DMS climatology represents a valuable tool for atmospheric chemistry, climate, and Earth System models.
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Publisher's official version 17 2 MB Open access
Readme 3 KB Open access
Figure S1. Annual map of the location of the 1° × 1° ocean pixels with DMS data. 26 KB Open access
Figure S2. Smoothed monthly first‐guess fields of sea surface DMS concentration (nM). 205 MB Open access
Figure S3. Monthly latitudinal comparison between K00 and L10 in % of the difference (using L10 as the reference). 15 MB Open access
Table S1. List of the data contributors to the DMS database, with their contributor number, sampling region, number of samples, dates, and references. 66 KB Open access
Text S1. Bibliography 45 KB Open access
Tab‐delimited Table 1. 2 KB Open access
Tab‐delimited Table 2. 1 KB Open access
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Lana A., Bell T. G., Simo R., Vallina S. M., Ballabrera-Poy J., Kettle A. J., Dachs J., Bopp L., Saltzman E. S., Stefels J., Johnson J. E., Liss P. S. (2011). An updated climatology of surface dimethlysulfide concentrations and emission fluxes in the global ocean. Global Biogeochemical Cycles, 25(1), GB1004, (17p.). Publisher's official version : https://doi.org/10.1029/2010GB003850 , Open Access version : https://archimer.ifremer.fr/doc/00660/77165/