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| Titel |
Distribution of CO2 parameters in the Western Tropical Atlantic Ocean |
| VerfasserIn |
Moacyr Araujo, Frédéric Bonou, Carlos Noriega, Nathalie Lefèvre |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250125375
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| Publikation (Nr.) |
 EGU/EGU2016-4948.pdf |
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| Zusammenfassung |
| The variability of sea surface Total Alkalinity (TA) and sea surface Total Inorganic Carbon
(CT) is examined using all available data in the western tropical Atlantic (WTA: 20˚ S-20˚
N, 60˚ W-20˚ W). Lowest TA and CTare observed for the region located between
0ºN-15ºN/60ºW-50ºW and are explained by the influence of the Amazon plume during boreal
summer. In the southern part of the area, 20ºS-10ºS/40ºW-60ºW, the highest values of TA and
CTare linked to the CO2–rich waters due to the equatorial upwelling, which are transported
by the South Equatorial Current (SEC) flowing from the African coast to the Brazilian shore.
An increase of CT of 0.9 ± 0.3 μmol kg−1yr−1has been observed in the SEC region and is
consistent with previous published estimates. A revised CT-Sea Surface Salinity (SSS)
relationship is proposed for the WTA to take into account the variability of CT at low
salinities. This new CT-SSS relationship together with a published TA-SSS relationship
allow to calculate pCO2 values that compare well with observed pCO2 (R2=0.90). |
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