Carbonate chemistry responds more strongly to eutrophication than ocean acidification in the coastal zone

• Main Authors: Borges, Alberto Vieira, Gypens, Nathalie
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2010
• Subjects: Océanographie physique et chimique; Environnement et pollution; accumulation; anthropogenic; CO2; ocean; carbonate; chemistry; marine; primary; production; calcification; modeling; carbon; cycle; acidification; eutrophication; Ocean acidification
• Online Access: http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/79681; https://dipot.ulb.ac.be/dspace/bitstream/2013/79681/4/79681.pdf; https://dipot.ulb.ac.be/dspace/bitstream/2013/79681/1/2010-Borges_LO_55_346_353.pdf

The accumulation of anthropogenic CO2 in the ocean has altered carbonate chemistry in surface waters since preindustrial times and is expected to continue to do so in the coming centuries. Changes in carbonate chemistry can modify the rates and fates of marine primary production and calcification. These modifications can in turn lead to feedback on increasing atmospheric CO2. We show, using a numerical model, that in highly productive nearshore coastal marine environments, the effect of eutrophication on carbon cycling can counter the effect of ocean acidification on the carbonate chemistry of surface waters. Also, changes in river nutrient delivery due to management regulation policies can lead to stronger changes in carbonate chemistry than ocean acidification. Whether antagonistic or synergistic, the response of carbonate chemistry to changes of nutrient delivery to the coastal zone (increase or decrease, respectively) is stronger than ocean acidification. FLWIN info:eu-repo/semantics/published