Acidification observations in a transoceanic line of the North Atlantic Ocean
EUR-OCEANS Hot Topics Conference - A Changing Ocean, 6-8 November 2013, Gran Canaria, Spain Ocean acidification is directly related to increasing atmospheric CO2 levels due to human activities and the active role of the global ocean as a sink for this anthropogenic CO2 (Cant). Once in solution, Cant...
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ftcsic:oai:digital.csic.es:10261/96546 2024-02-11T10:06:21+01:00 Acidification observations in a transoceanic line of the North Atlantic Ocean Fernández-Guallart, E. Fajar, Noelia Pérez, Fiz F. Padín, X. A. Vázquez Rodríguez, Marcos Calvo, Eva María Ríos, Aida F. Pelejero, Carles 2013-11-06 http://hdl.handle.net/10261/96546 unknown http://www.eur-oceans.eu/hot_topics_conf#prog EUR-OCEANS Hot Topics Conference - A Changing Ocean. Booklet: 16 (2013) http://hdl.handle.net/10261/96546 none póster de congreso http://purl.org/coar/resource_type/c_6670 2013 ftcsic 2024-01-16T09:58:38Z EUR-OCEANS Hot Topics Conference - A Changing Ocean, 6-8 November 2013, Gran Canaria, Spain Ocean acidification is directly related to increasing atmospheric CO2 levels due to human activities and the active role of the global ocean as a sink for this anthropogenic CO2 (Cant). Once in solution, Cant affects the chemical balances of the CO2 system in seawater and translates in a decrease in ocean pH. In addition to the more classical studies on the estimation of the anthropogenic carbon account in the oceans, establishing the rate at which ocean acidification is taking place is of crucial importance when studying how the carbon cycle will evolve under a climate change scenario. The magnitude of this change is critical, for instance, to determine the fate of many marine organisms, particularly those that produce CaCO3 and are also keystone in ecosystems and/or food webs (pteropods, coccolithophorids, foraminifera and corals). Oxidation of organic matter, which is mediated by microorganisms, also lowers pH by adding CO2 into seawater. Past reported pH changes of seawater and future pH projections proposed from Ocean General Circulation Models are important to better understand temporal variability of pH. However, in situ measurements documenting the evolution of ocean pH over time are still limited, while they are the only practical tool to fully constrain the extent of acidification. Here we present acidification observations between 1992 and 2011 along a repeat transoceanic line at 24.5°N in the North Atlantic Ocean, together with anthropogenic and non-anthropogenic contributions to that signal. pH changes were found to be essentially zero below 1000 dbar while in the upper ocean, significant pH decreases as large as 0.05 units were observed throughout the first 800 dbar. In general, anthropogenic and non-anthropogenic contributions to this change were estimated to be of similar magnitude. However, the anthropogenic weight was found to be significantly enhanced in the westernmost flank, probably related to the ... Still Image North Atlantic Ocean acidification Digital.CSIC (Spanish National Research Council) |
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Digital.CSIC (Spanish National Research Council) |
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EUR-OCEANS Hot Topics Conference - A Changing Ocean, 6-8 November 2013, Gran Canaria, Spain Ocean acidification is directly related to increasing atmospheric CO2 levels due to human activities and the active role of the global ocean as a sink for this anthropogenic CO2 (Cant). Once in solution, Cant affects the chemical balances of the CO2 system in seawater and translates in a decrease in ocean pH. In addition to the more classical studies on the estimation of the anthropogenic carbon account in the oceans, establishing the rate at which ocean acidification is taking place is of crucial importance when studying how the carbon cycle will evolve under a climate change scenario. The magnitude of this change is critical, for instance, to determine the fate of many marine organisms, particularly those that produce CaCO3 and are also keystone in ecosystems and/or food webs (pteropods, coccolithophorids, foraminifera and corals). Oxidation of organic matter, which is mediated by microorganisms, also lowers pH by adding CO2 into seawater. Past reported pH changes of seawater and future pH projections proposed from Ocean General Circulation Models are important to better understand temporal variability of pH. However, in situ measurements documenting the evolution of ocean pH over time are still limited, while they are the only practical tool to fully constrain the extent of acidification. Here we present acidification observations between 1992 and 2011 along a repeat transoceanic line at 24.5°N in the North Atlantic Ocean, together with anthropogenic and non-anthropogenic contributions to that signal. pH changes were found to be essentially zero below 1000 dbar while in the upper ocean, significant pH decreases as large as 0.05 units were observed throughout the first 800 dbar. In general, anthropogenic and non-anthropogenic contributions to this change were estimated to be of similar magnitude. However, the anthropogenic weight was found to be significantly enhanced in the westernmost flank, probably related to the ... |
format |
Still Image |
author |
Fernández-Guallart, E. Fajar, Noelia Pérez, Fiz F. Padín, X. A. Vázquez Rodríguez, Marcos Calvo, Eva María Ríos, Aida F. Pelejero, Carles |
spellingShingle |
Fernández-Guallart, E. Fajar, Noelia Pérez, Fiz F. Padín, X. A. Vázquez Rodríguez, Marcos Calvo, Eva María Ríos, Aida F. Pelejero, Carles Acidification observations in a transoceanic line of the North Atlantic Ocean |
author_facet |
Fernández-Guallart, E. Fajar, Noelia Pérez, Fiz F. Padín, X. A. Vázquez Rodríguez, Marcos Calvo, Eva María Ríos, Aida F. Pelejero, Carles |
author_sort |
Fernández-Guallart, E. |
title |
Acidification observations in a transoceanic line of the North Atlantic Ocean |
title_short |
Acidification observations in a transoceanic line of the North Atlantic Ocean |
title_full |
Acidification observations in a transoceanic line of the North Atlantic Ocean |
title_fullStr |
Acidification observations in a transoceanic line of the North Atlantic Ocean |
title_full_unstemmed |
Acidification observations in a transoceanic line of the North Atlantic Ocean |
title_sort |
acidification observations in a transoceanic line of the north atlantic ocean |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/96546 |
genre |
North Atlantic Ocean acidification |
genre_facet |
North Atlantic Ocean acidification |
op_relation |
http://www.eur-oceans.eu/hot_topics_conf#prog EUR-OCEANS Hot Topics Conference - A Changing Ocean. Booklet: 16 (2013) http://hdl.handle.net/10261/96546 |
op_rights |
none |
_version_ |
1790603994595328000 |