Impacts of anthropogenic SOx, NOx and NH3 on acidification of coastal waters and shipping lanes

Hunter, Keith A., Liss, Peter S., Surapipith, Vanisa, Dentener, Frank, Duce, Robert, Kanakidou, Maria, Kubilay, Nilgun, Mahowald, Natalie, Okin, Greg, Sarin, Manmohan, Uematsu, Mitsuo and Zhu, Tong (2011) Impacts of anthropogenic SOx, NOx and NH3 on acidification of coastal waters and shipping lanes. Geophysical Research Letters, 38 (13). ISSN 0094-8276

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Abstract

absorbed from the atmosphere is now well-recognized and is considered to have lowered surface ocean pH by 0.1 since the mid-18th century. Future acidification may lead to undersaturation of CaCO3 making growth of calcifying organisms difficult. However, other anthropogenic gases also have the potential to alter ocean pH and CO2 chemistry, specifically SOx and NOx and NH3. We demonstrate using a simple chemical model that in coastal water regions with high atmospheric inputs of these gases, their pH reduction is almost completely canceled out by buffering reactions involving seawater HCO3- and CO32- ions. However, a consequence of this buffering is a significant decrease in the uptake of anthropogenic CO2 by the atmosphere in these areas.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Rosie Cullington
Date Deposited: 15 Jul 2011 12:46
Last Modified: 20 May 2020 23:47
URI: https://ueaeprints.uea.ac.uk/id/eprint/33805
DOI: 10.1029/2011GL047720

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