Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean
Research article Measurements of ocean pH, alkalinity, and carbonate ion concentrations ([CO3 2−]) during three cruises in the Atlantic Ocean and one in the Mediterranean Sea were used to assess the reliability of the recent spectrophotometric [CO3 2−] methodology and to determine aragonite saturati...
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Centro Oceanográfico de A Coruña
2015
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Online Access: | http://hdl.handle.net/10508/9708 http://hdl.handle.net/10261/316449 https://doi.org/10.1021/acs.est.5b03033 |
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ftcsic:oai:digital.csic.es:10261/316449 2024-02-11T10:06:16+01:00 Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean Fajar, N. (Noelia) García-Ibáñez, M.I. Sanleón-Bartolomé, H. (Henar) Álvarez, M. (Marta) Fiz Pérez, F. Vigo (España) 2009-2014 Atlantic Ocean North Atlantic Mediterranean Sea 2015-09-30T11:16:33Z http://hdl.handle.net/10508/9708 http://hdl.handle.net/10261/316449 https://doi.org/10.1021/acs.est.5b03033 en eng Centro Oceanográfico de A Coruña 0013-936X http://hdl.handle.net/10508/9708 http://hdl.handle.net/10261/316449 doi:10.1021/acs.est.5b03033 Environmental Science & Technology, 49. 2015: 1-27 21356 open carbonate system acidification pH aragonite saturation site chemical oceanography research article SMUR SI 2015 ftcsic https://doi.org/10.1021/acs.est.5b03033 2024-01-16T11:44:31Z Research article Measurements of ocean pH, alkalinity, and carbonate ion concentrations ([CO3 2−]) during three cruises in the Atlantic Ocean and one in the Mediterranean Sea were used to assess the reliability of the recent spectrophotometric [CO3 2−] methodology and to determine aragonite saturation states. Measurements of [CO3 2−] along the Atlantic Ocean showed high consistency with the [CO3 2−] values calculated from pH and alkalinity, with negligible biases (0.4 ± 3.4 μmol· kg−1). In the warm, salty, high alkalinity and high pH Mediterranean waters, the spectrophotometric [CO3 2−] methodology underestimates the measured [CO3 2−] (4.0 ± 5.0 μmol·kg−1), with anomalies positively correlated to salinity. These waters also exhibited high in situ [CO3 2−] compared to the expected aragonite saturation. The very high buffering capacity allows the Mediterranean Sea waters to remain over the saturation level of aragonite for long periods of time. Conversely, the relatively thick layer of undersaturated waters between 500 and 1000 m depths in the Tropical Atlantic is expected to progress to even more negative undersaturation values. Moreover, the northern North Atlantic presents [CO3 2−] slightly above the level of aragonite saturation, and the expected anthropogenic acidification could result in reductions of the aragonite saturation levels during future decades, acting as a stressor for the large population of cold-water-coral communities. 5,2280 Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Environmental Science & Technology 49 19 11679 11687 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
carbonate system acidification pH aragonite saturation site chemical oceanography |
spellingShingle |
carbonate system acidification pH aragonite saturation site chemical oceanography Fajar, N. (Noelia) García-Ibáñez, M.I. Sanleón-Bartolomé, H. (Henar) Álvarez, M. (Marta) Fiz Pérez, F. Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean |
topic_facet |
carbonate system acidification pH aragonite saturation site chemical oceanography |
description |
Research article Measurements of ocean pH, alkalinity, and carbonate ion concentrations ([CO3 2−]) during three cruises in the Atlantic Ocean and one in the Mediterranean Sea were used to assess the reliability of the recent spectrophotometric [CO3 2−] methodology and to determine aragonite saturation states. Measurements of [CO3 2−] along the Atlantic Ocean showed high consistency with the [CO3 2−] values calculated from pH and alkalinity, with negligible biases (0.4 ± 3.4 μmol· kg−1). In the warm, salty, high alkalinity and high pH Mediterranean waters, the spectrophotometric [CO3 2−] methodology underestimates the measured [CO3 2−] (4.0 ± 5.0 μmol·kg−1), with anomalies positively correlated to salinity. These waters also exhibited high in situ [CO3 2−] compared to the expected aragonite saturation. The very high buffering capacity allows the Mediterranean Sea waters to remain over the saturation level of aragonite for long periods of time. Conversely, the relatively thick layer of undersaturated waters between 500 and 1000 m depths in the Tropical Atlantic is expected to progress to even more negative undersaturation values. Moreover, the northern North Atlantic presents [CO3 2−] slightly above the level of aragonite saturation, and the expected anthropogenic acidification could result in reductions of the aragonite saturation levels during future decades, acting as a stressor for the large population of cold-water-coral communities. 5,2280 |
format |
Article in Journal/Newspaper |
author |
Fajar, N. (Noelia) García-Ibáñez, M.I. Sanleón-Bartolomé, H. (Henar) Álvarez, M. (Marta) Fiz Pérez, F. |
author_facet |
Fajar, N. (Noelia) García-Ibáñez, M.I. Sanleón-Bartolomé, H. (Henar) Álvarez, M. (Marta) Fiz Pérez, F. |
author_sort |
Fajar, N. (Noelia) |
title |
Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean |
title_short |
Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean |
title_full |
Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean |
title_fullStr |
Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean |
title_full_unstemmed |
Spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the Mediterranean Sea and Atlantic Ocean |
title_sort |
spectrophotometric measurements of the carbonate ion concentration:aragonite saturation states in the mediterranean sea and atlantic ocean |
publisher |
Centro Oceanográfico de A Coruña |
publishDate |
2015 |
url |
http://hdl.handle.net/10508/9708 http://hdl.handle.net/10261/316449 https://doi.org/10.1021/acs.est.5b03033 |
op_coverage |
Vigo (España) 2009-2014 Atlantic Ocean North Atlantic Mediterranean Sea |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
0013-936X http://hdl.handle.net/10508/9708 http://hdl.handle.net/10261/316449 doi:10.1021/acs.est.5b03033 Environmental Science & Technology, 49. 2015: 1-27 21356 |
op_rights |
open |
op_doi |
https://doi.org/10.1021/acs.est.5b03033 |
container_title |
Environmental Science & Technology |
container_volume |
49 |
container_issue |
19 |
container_start_page |
11679 |
op_container_end_page |
11687 |
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1790603889448321024 |