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Coastal ocean acidification in Brazil: a brief overview and perspective
Cotovicz Júnior, Luiz Carlos; Marins, Rozane Valente; Abril, GwenaëlThis perspective paper aims at presenting the current knowledge on the processes of ocean acidification (OA) and coastal acidification (CA) in the Brazilian coastal ocean. We define and differentiate the processes of OA and CA: the first driven by the actual global increase of atmospheric carbon dioxide (CO2 ); the second driven by a combination of ocean uptake of atmospheric CO2 and other local/regional chemic...
Spreading eutrophication and changing CO2 fluxes in the tropical coastal ocean:...
Abril, Gwenaël; Cotovicz Júnior, Luiz C.; Nepomuceno, Nepomuceno; Erbas, Thais; Costa, Suzan; Ramos, Vinicius V.; Moser, Gleyci; Fernandes, AlexandreIn Brazil and in many other tropical countries, large urban cities and populations are still growing on the coast and coverage in terms of sewage treatments is far from desirable. Cultural eutrophication is not solely a threat for the coastal ocean; it is now acting as one of its major biogeochemical and ecological driver. Along the littoral of the state of Rio de Janeiro, semi-enclosed marine bays and lagoons ...
Spatio-temporal variability of methane (CH ) concentrations and diffusive fluxe...
Cotovicz Júnior, Luiz C.; Knoppers, Bastiaan A.; Poirier, Dominique; Costa Sousa, Suzan J.; Abril, GwenaëlThe increasing concentrations of methane (CH4) in the atmosphere stress the importance of monitoringand quantifying the fluxes from coastal environments. In nine sampling campaigns between 2013 and 2014,we measured the spatial CH4concentrations, identified major sources and calculated the fluxes at the air-water interface in an eutrophic tropical embayment, Guanabara Bay, Rio de Janeiro, Brazil. The bay presentedh...
A large CO2 sink enhanced by eutrophication in a tropical coastal embayment (Gu...
Cotovicz Júnior, Luiz C.; Knoppers, Bastiaan Adriaan; Brandini, Nilva; Costa Sousa, Suzan J.; Abril, GwenaëlIn contrast to its small surface area, the coastal zone plays a disproportionate role in the global carbon cycle. Carbon production, transformation, emission and burial rates at the land–ocean interface are still poorly known, especially in tropical regions. 5 Surface water pCO2 and ancillary parameters were monitored during nine field campaigns between April 2013 and April 2014 in Guanabara Bay, a tropical eut...