Articles | Volume 12, issue 20
https://doi.org/10.5194/bg-12-6125-2015
https://doi.org/10.5194/bg-12-6125-2015
Research article
 | 
27 Oct 2015
Research article |  | 27 Oct 2015

A strong CO2 sink enhanced by eutrophication in a tropical coastal embayment (Guanabara Bay, Rio de Janeiro, Brazil)

L. C. Cotovicz Jr., B. A. Knoppers, N. Brandini, S. J. Costa Santos, and G. Abril

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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (03 Aug 2015) by Steven Bouillon
AR by Luiz Carlos Cotovicz Junior on behalf of the Authors (09 Sep 2015)  Author's response   Manuscript 
ED: Referee Nomination & Report Request started (10 Sep 2015) by Steven Bouillon
RR by Wei-Jun Cai (22 Sep 2015)
ED: Publish subject to technical corrections (09 Oct 2015) by Steven Bouillon
AR by Luiz Carlos Cotovicz Junior on behalf of the Authors (16 Oct 2015)  Manuscript 
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Short summary
Air-water CO2 fluxes were monitored in Guanabara Bay (Brazil), a tropical eutrophic coastal embayment. In contrast to other estuaries worldwide, Guanabara Bay behaves as an annual CO2 sink (-9.6 to -18.3 molC m2 yr) due to the concomitant effects of strong radiation, thermal stratification, and high availability of nutrients, which promotes huge phytoplankton development and autotrophy. Our results show that CO2 budget assertions still lack information on tropical marine-dominated estuaries.
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