Observed acidification trends in North Atlantic water masses
International audience 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 co...
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ftunivnantes:oai:HAL:hal-00853209v1 2023-05-15T16:47:03+02:00 Observed acidification trends in North Atlantic water masses Vázquez-Rodríguez, M. Pérez, F. F. Velo, A. Ríos, A. F. Mercier, H. Instituto de Investigaciones Marinas Consejo Superior de Investigaciones Científicas Madrid (CSIC) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2012 https://hal.science/hal-00853209 https://doi.org/10.5194/bg-9-5217-2012 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-9-5217-2012 hal-00853209 https://hal.science/hal-00853209 doi:10.5194/bg-9-5217-2012 ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00853209 Biogeosciences, 2012, 9, pp.5217-5230. ⟨10.5194/bg-9-5217-2012⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.5194/bg-9-5217-2012 2023-02-15T00:07:53Z International audience 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. Article in Journal/Newspaper Iceland Labrador Sea North Atlantic Ocean acidification Subarctic Université de Nantes: HAL-UNIV-NANTES Biogeosciences 9 12 5217 5230 |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Vázquez-Rodríguez, M. Pérez, F. F. Velo, A. Ríos, A. F. Mercier, H. Observed acidification trends in North Atlantic water masses |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience 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. |
author2 |
Instituto de Investigaciones Marinas Consejo Superior de Investigaciones Científicas Madrid (CSIC) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Vázquez-Rodríguez, M. Pérez, F. F. Velo, A. Ríos, A. F. Mercier, H. |
author_facet |
Vázquez-Rodríguez, M. Pérez, F. F. Velo, A. Ríos, A. F. Mercier, H. |
author_sort |
Vázquez-Rodríguez, M. |
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 |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00853209 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_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00853209 Biogeosciences, 2012, 9, pp.5217-5230. ⟨10.5194/bg-9-5217-2012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-9-5217-2012 hal-00853209 https://hal.science/hal-00853209 doi:10.5194/bg-9-5217-2012 |
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 |
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1766037155162882048 |