A Time-Series View of Changing Ocean Chemistry Due to Ocean Uptake of Anthropogenic CO2 and Ocean Acidification

Autores

Bates, N., Astor, Y., Church, M., Currie, K., Dore, J., González-Dávila, M., Lorenzoni, L., Müller-Karger, F.E., Olafsson, J. and Santa-Casiano, M.

Publicado en

Oceanography, v. 27(1):126-141

Año de publicación

2014

Afiliaciones

Bermuda Institute of Ocean Sciences, Bermuda, Ocean and Earth Science, National Oceanography Centre, University of Southampton, UK
Fundacion la Salle de Ciencias Naturales, Estación de Investigaciones Marinas, Venezuela
Department of Oceanography, University of Hawaii, Honolulu, HI, USA
National Institute of Water and Atmospheric Research, Dunedin, New Zealand
Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, USA
Departmento de Quımica, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria, Spain
College of Marine Science, University of South Florida, St. Petersburg, FL, USA
College of Marine Science, University of South Florida, St. Petersburg, FL, USA
Marine Research Institute, Reykjavik,Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland
Departmento de Quımica, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria, Spain

Programa

CRN3

Proyecto

CRN3094

Keywords

dissolved inorganic carbon, salinity-normalized DIC, surface seawater pCO2, anthropogenic CO2, Ocean Chemistry

DOI

http://dx.doi.org/10.5670/oceanog.2014.16
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Resumen

Sustained observations provide critically needed data and understanding not only about ocean warming and water cycle reorganization (e.g., salinity changes), ocean eutrophication, and ocean deoxygenation, but also about changes in ocean chemistry. As an example of changes in the global ocean carbon cycle, consistent changes in surface seawater CO2-carbonate chemistry are documented by seven independent CO2 time series that provide sustained ocean observations collected for periods from 15 to 30 years: (1) Iceland Sea, (2) Irminger Sea, (3) Bermuda Atlantic Time-series Study (BATS), (4) European Station for Time series in the Ocean at the Canary Islands (ESTOC), (5) CArbon Retention In A Colored Ocean sites in the North Atlantic (CARIACO), (6) Hawaii Ocean Time-series (HOT), and (7) Munida in the Pacific Ocean. These ocean time-series sites exhibit very consistent changes in surface ocean chemistry that reflect the impact of uptake of anthropogenic CO2 and ocean acidification. The article discusses the long-term changes in dissolved inorganic carbon (DIC), salinity-normalized DIC, and surface seawater pCO2 (partial pressure of CO2) due to the uptake of anthropogenic CO2 and its impact on the ocean&rsquos buffering capacity. In addition, we evaluate changes in seawater chemistry that are due to ocean acidification and its impact on pH and saturation states for biogenic calcium carbonate minerals.