Observed acidification trends in North Atlantic water masses
14 páginas, 4 figuras, 3 tablas.-- Proyecto Carbochange The lack of observational pH data has made it difficult to assess recent rates of ocean acidification, particularly in the high latitudes. Here we present a time series that spans over 27 yr (1981–2008) of high-quality carbon system measurement...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
European Geosciences Union
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/64124 https://doi.org/10.5194/bg-9-5217-2012 |
id |
ftcsic:oai:digital.csic.es:10261/64124 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/64124 2024-02-11T10:05:03+01:00 Observed acidification trends in North Atlantic water masses Vázquez Rodríguez, Marcos Pérez, Fiz F. Velo, A. Ríos, Aida F. Mercier, Herlé 2012 http://hdl.handle.net/10261/64124 https://doi.org/10.5194/bg-9-5217-2012 en eng European Geosciences Union #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/264879 http://dx.doi.org/10.5194/bg-9-5217-2012 Sí Biogeosciences 9(12): 5217-5230 (2012) 1726-4170 http://hdl.handle.net/10261/64124 doi:10.5194/bg-9-5217-2012 1726-4189 open artículo http://purl.org/coar/resource_type/c_6501 2012 ftcsic https://doi.org/10.5194/bg-9-5217-2012 2024-01-16T09:44:13Z 14 páginas, 4 figuras, 3 tablas.-- Proyecto Carbochange The lack of observational pH data has made it difficult to assess recent rates of ocean acidification, particularly in the high latitudes. Here we present a time series that spans over 27 yr (1981–2008) of high-quality carbon system measurements in the North Atlantic, which comprises fourteen cruises and covers the important water mass formation areas of the Irminger and Iceland Basins. We provide direct quantification of acidification rates in upper and intermediate North Atlantic waters. The highest rates were associated with surface waters and with Labrador Sea Water (LSW). The Subarctic Intermediate and Subpolar Mode Waters (SAIW and SPMW) showed acidification rates of −0.0019±0.0001 and −0.0012±0.0002 yr−1, respectively. The deep convection activity in the North Atlantic Subpolar Gyre injects surface waters loaded with anthropogenic CO2 into lower layers, provoking the remarkable acidification rate observed for LSW in the Iceland Basin (−0.0016±0.0002 yr−1). An extrapolation of the observed linear acidification trends suggests that the pH of LSW could drop 0.45 units with respect to pre-industrial levels by the time atmospheric CO2 concentrations reach 775 ppm. Under circulation conditions and evolution of CO2 emission rates similar to those of the last three decades, by the time atmospheric CO2 reaches 550 ppm, an aragonite undersaturation state could be reached in the cLSW of the Iceland Basin, earlier than surface SPMW. The research leading to these results was supported by the EU FP7 project CARBOCHANGE “Changes in carbon uptake and emissions by oceans in a changing climate”, which received funding from the European Commission’s Seventh Framework Programme under grant agreement no. 264879; by the Spanish Ministry of Science and Innovation and co-funded by Fondo Eurpeo de Desarrollo Regional 2007–2012 (FEDER) through the CATARINA Project (CTM2010-17141). The OVIDE research project was co-funded by the IFREMER, CNRS/INSU and LEFE. H.M. was ... Article in Journal/Newspaper Iceland Labrador Sea North Atlantic Ocean acidification Subarctic Digital.CSIC (Spanish National Research Council) Biogeosciences 9 12 5217 5230 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
14 páginas, 4 figuras, 3 tablas.-- Proyecto Carbochange The lack of observational pH data has made it difficult to assess recent rates of ocean acidification, particularly in the high latitudes. Here we present a time series that spans over 27 yr (1981–2008) of high-quality carbon system measurements in the North Atlantic, which comprises fourteen cruises and covers the important water mass formation areas of the Irminger and Iceland Basins. We provide direct quantification of acidification rates in upper and intermediate North Atlantic waters. The highest rates were associated with surface waters and with Labrador Sea Water (LSW). The Subarctic Intermediate and Subpolar Mode Waters (SAIW and SPMW) showed acidification rates of −0.0019±0.0001 and −0.0012±0.0002 yr−1, respectively. The deep convection activity in the North Atlantic Subpolar Gyre injects surface waters loaded with anthropogenic CO2 into lower layers, provoking the remarkable acidification rate observed for LSW in the Iceland Basin (−0.0016±0.0002 yr−1). An extrapolation of the observed linear acidification trends suggests that the pH of LSW could drop 0.45 units with respect to pre-industrial levels by the time atmospheric CO2 concentrations reach 775 ppm. Under circulation conditions and evolution of CO2 emission rates similar to those of the last three decades, by the time atmospheric CO2 reaches 550 ppm, an aragonite undersaturation state could be reached in the cLSW of the Iceland Basin, earlier than surface SPMW. The research leading to these results was supported by the EU FP7 project CARBOCHANGE “Changes in carbon uptake and emissions by oceans in a changing climate”, which received funding from the European Commission’s Seventh Framework Programme under grant agreement no. 264879; by the Spanish Ministry of Science and Innovation and co-funded by Fondo Eurpeo de Desarrollo Regional 2007–2012 (FEDER) through the CATARINA Project (CTM2010-17141). The OVIDE research project was co-funded by the IFREMER, CNRS/INSU and LEFE. H.M. was ... |
format |
Article in Journal/Newspaper |
author |
Vázquez Rodríguez, Marcos Pérez, Fiz F. Velo, A. Ríos, Aida F. Mercier, Herlé |
spellingShingle |
Vázquez Rodríguez, Marcos Pérez, Fiz F. Velo, A. Ríos, Aida F. Mercier, Herlé Observed acidification trends in North Atlantic water masses |
author_facet |
Vázquez Rodríguez, Marcos Pérez, Fiz F. Velo, A. Ríos, Aida F. Mercier, Herlé |
author_sort |
Vázquez Rodríguez, Marcos |
title |
Observed acidification trends in North Atlantic water masses |
title_short |
Observed acidification trends in North Atlantic water masses |
title_full |
Observed acidification trends in North Atlantic water masses |
title_fullStr |
Observed acidification trends in North Atlantic water masses |
title_full_unstemmed |
Observed acidification trends in North Atlantic water masses |
title_sort |
observed acidification trends in north atlantic water masses |
publisher |
European Geosciences Union |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/64124 https://doi.org/10.5194/bg-9-5217-2012 |
genre |
Iceland Labrador Sea North Atlantic Ocean acidification Subarctic |
genre_facet |
Iceland Labrador Sea North Atlantic Ocean acidification Subarctic |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/264879 http://dx.doi.org/10.5194/bg-9-5217-2012 Sí Biogeosciences 9(12): 5217-5230 (2012) 1726-4170 http://hdl.handle.net/10261/64124 doi:10.5194/bg-9-5217-2012 1726-4189 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/bg-9-5217-2012 |
container_title |
Biogeosciences |
container_volume |
9 |
container_issue |
12 |
container_start_page |
5217 |
op_container_end_page |
5230 |
_version_ |
1790601899626463232 |