Data/hora: 09/06/2024 13:50:19

Provedor de dados: | 5
País: | France
Título: | An updated climatology of surface dimethlysulfide concentrations and emission fluxes in the global ocean
Autores: | 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.
Data: | 2011-01
Ano: | 2011
Resumo: | 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.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00660/77165/78578.pdf

https://archimer.ifremer.fr/doc/00660/77165/78579.txt

https://archimer.ifremer.fr/doc/00660/77165/78580.eps

https://archimer.ifremer.fr/doc/00660/77165/78585.eps

https://archimer.ifremer.fr/doc/00660/77165/78586.eps

https://archimer.ifremer.fr/doc/00660/77165/78587.tex

https://archimer.ifremer.fr/doc/00660/77165/78588.tex

https://archimer.ifremer.fr/doc/00660/77165/78589.txt

https://archimer.ifremer.fr/doc/00660/77165/78590.txt

DOI:10.1029/2010GB003850

https://archimer.ifremer.fr/doc/00660/77165/

Editor: | Amer Geophysical Union
Formato: | application/pdf
Fonte: | Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2011-01 , Vol. 25 , N. 1 , P. GB1004, (17p.)

Fonte:

info:eu-repo/semantics/openAccess

restricted use