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| Titel |
Seasonal air-sea CO2 fluxes off Northwest Africa |
| VerfasserIn |
Melchor González-Dávila, J. Magdalena Santana-Casiano, Francisco Machín |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088610
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| Publikation (Nr.) |
 EGU/EGU2014-2734.pdf |
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| Zusammenfassung |
| CO2 fluxes variability is explored off West Africa, an area dominated by the presence of the
Mauritanian upwelling. Surface data autonomously taken by instruments installed on ships of
opportunities over three years, 2005-2008, are used in the domain from the Canaries to 10oN.
The observed temperature decreased with latitude and had its minimum value in the
upwelling, with 17-18oC. Salinity increases with latitude, and had its minimum of 33
in autumn south of 15oS, due to heavy rainfall during that season. The fugacity
in seawater showed significant spatial and temporal variability dominated by the
presence of the upwelling, reaching maximum values of 750 μatm in spring. CO2
fluxes indicated that this area was a source of CO2 throughout the year, acting as a
sink just north of 24oN in winter and spring. Maximum fluxes took place in the
upwelling area with values up to 3000 mmol m-2 in spring. Between 20o-21oN, CO2
fluxes decreased gradually over time, at an average rate of 650-700 mmol m-2 y-1.
SST and fCO2sw decreased while fCO2atm increased for the period 2005-2008. |
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