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Variability of dissolved inorganic carbon (DIC) and the fugacity of carbon dioxide (fCO2) is discussed for tropical East Atlantic surface waters in October–November 1993 and May–June 1994. High precipitation associated with the Intertropical Convergence Zone, river input and equatorial upwelling affected the content of DIC and fCO2 of these tropical surface waters. Individual hydrographic regions had a characteristic CO2-chemistry.
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Bakker et al. (1999) studied this question.
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