Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean

12 páginas, 4 figuras,1 tabla.-- Proyecto Carbochange The variability in the storage of the oceanic anthropogenic CO2 (Cant) on decadal timescales is evaluated within the main water masses of the Subtropical North Atlantic along 24.5°N. Inorganic carbon measurements on five cruises of the A05 sectio...

Full description

Bibliographic Details
Published in:Progress in Oceanography
Main Authors: Fernández-Guallart, E., Schuster, Ute, Fajar, Noelia, Legge, O., Brown, Peter J., Pelejero, Carles, Messias, M. J., Calvo, Eva María, Watson, Andrew J., Ríos, Aida F., Pérez, Fiz F.
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2015
Subjects:
Online Access:http://hdl.handle.net/10261/110347
https://doi.org/10.1016/j.pocean.2014.11.006
id ftcsic:oai:digital.csic.es:10261/110347
record_format openpolar
spelling ftcsic:oai:digital.csic.es:10261/110347 2024-02-11T10:05:36+01:00 Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean Fernández-Guallart, E. Schuster, Ute Fajar, Noelia Legge, O. Brown, Peter J. Pelejero, Carles Messias, M. J. Calvo, Eva María Watson, Andrew J. Ríos, Aida F. Pérez, Fiz F. 2015-02 http://hdl.handle.net/10261/110347 https://doi.org/10.1016/j.pocean.2014.11.006 en eng Elsevier #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/264879 Postprint http://dx.doi.org/10.1016/j.pocean.2014.11.006 Sí Progress in Oceanography 131: 21–32 (2015) 0079-6611 http://hdl.handle.net/10261/110347 doi:10.1016/j.pocean.2014.11.006 open artículo http://purl.org/coar/resource_type/c_6501 2015 ftcsic https://doi.org/10.1016/j.pocean.2014.11.006 2024-01-16T10:05:04Z 12 páginas, 4 figuras,1 tabla.-- Proyecto Carbochange The variability in the storage of the oceanic anthropogenic CO2 (Cant) on decadal timescales is evaluated within the main water masses of the Subtropical North Atlantic along 24.5°N. Inorganic carbon measurements on five cruises of the A05 section are used to assess the changes in Cant between 1992 and 2011, using four methods (ΔC∗, TrOCA, φCT0, TTD). We find good agreement between the Cant distribution and storage obtained using chlorofluorocarbons and CO2 measurements in both the vertical and horizontal scales. Cant distribution shows higher concentrations and greater decadal storage rates in the upper layers with both values decreasing with depth. The greatest enrichment is obserbed in the central water masses, with their upper limb showing a mean annual accumulation of about 1 μmol kg−1 yr−1 and the lower limb showing, on average, half that value. We detect zonal gradients in the accumulation of Cant. This finding is less clear in the upper waters, where greater variability exists between methods. In accordance with data from time series stations, greater accumulation of Cant is observed in the upper waters of the western basin of the North Atlantic Subtropical Gyre. In intermediate and deep layers, the zonal gradient in the storage of Cant is more robust between methods. The much lower mean storage rates found along the section (<0.25 μmol kg−1 yr−1) become more obvious when longitudinal differences in the Cant accumulation are considered. In particular, west of 70°W the ventilation by the Labrador Sea Water creates a noticeable accumulation rate up to ∼0.5 μmol kg−1 yr−1 between 1000 and 2500 dbar. If a Transient Stationary State of the Cant distributions is considered, significant bi-decadal trends in the Cant storage rates in the deepest North Atlantic waters are detected, in agreement with recent estimations. We acknowledge funding from the Spanish Ministry of Economy and Competitiveness through Grants CSD2008-00077 (Circumnavigation ... Article in Journal/Newspaper Labrador Sea North Atlantic Digital.CSIC (Spanish National Research Council) Western Basin Progress in Oceanography 131 21 32
institution Open Polar
collection Digital.CSIC (Spanish National Research Council)
op_collection_id ftcsic
language English
description 12 páginas, 4 figuras,1 tabla.-- Proyecto Carbochange The variability in the storage of the oceanic anthropogenic CO2 (Cant) on decadal timescales is evaluated within the main water masses of the Subtropical North Atlantic along 24.5°N. Inorganic carbon measurements on five cruises of the A05 section are used to assess the changes in Cant between 1992 and 2011, using four methods (ΔC∗, TrOCA, φCT0, TTD). We find good agreement between the Cant distribution and storage obtained using chlorofluorocarbons and CO2 measurements in both the vertical and horizontal scales. Cant distribution shows higher concentrations and greater decadal storage rates in the upper layers with both values decreasing with depth. The greatest enrichment is obserbed in the central water masses, with their upper limb showing a mean annual accumulation of about 1 μmol kg−1 yr−1 and the lower limb showing, on average, half that value. We detect zonal gradients in the accumulation of Cant. This finding is less clear in the upper waters, where greater variability exists between methods. In accordance with data from time series stations, greater accumulation of Cant is observed in the upper waters of the western basin of the North Atlantic Subtropical Gyre. In intermediate and deep layers, the zonal gradient in the storage of Cant is more robust between methods. The much lower mean storage rates found along the section (<0.25 μmol kg−1 yr−1) become more obvious when longitudinal differences in the Cant accumulation are considered. In particular, west of 70°W the ventilation by the Labrador Sea Water creates a noticeable accumulation rate up to ∼0.5 μmol kg−1 yr−1 between 1000 and 2500 dbar. If a Transient Stationary State of the Cant distributions is considered, significant bi-decadal trends in the Cant storage rates in the deepest North Atlantic waters are detected, in agreement with recent estimations. We acknowledge funding from the Spanish Ministry of Economy and Competitiveness through Grants CSD2008-00077 (Circumnavigation ...
format Article in Journal/Newspaper
author Fernández-Guallart, E.
Schuster, Ute
Fajar, Noelia
Legge, O.
Brown, Peter J.
Pelejero, Carles
Messias, M. J.
Calvo, Eva María
Watson, Andrew J.
Ríos, Aida F.
Pérez, Fiz F.
spellingShingle Fernández-Guallart, E.
Schuster, Ute
Fajar, Noelia
Legge, O.
Brown, Peter J.
Pelejero, Carles
Messias, M. J.
Calvo, Eva María
Watson, Andrew J.
Ríos, Aida F.
Pérez, Fiz F.
Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean
author_facet Fernández-Guallart, E.
Schuster, Ute
Fajar, Noelia
Legge, O.
Brown, Peter J.
Pelejero, Carles
Messias, M. J.
Calvo, Eva María
Watson, Andrew J.
Ríos, Aida F.
Pérez, Fiz F.
author_sort Fernández-Guallart, E.
title Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean
title_short Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean
title_full Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean
title_fullStr Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean
title_full_unstemmed Trends in anthropogenic CO2 in water masses of the Subtropical North Atlantic Ocean
title_sort trends in anthropogenic co2 in water masses of the subtropical north atlantic ocean
publisher Elsevier
publishDate 2015
url http://hdl.handle.net/10261/110347
https://doi.org/10.1016/j.pocean.2014.11.006
geographic Western Basin
geographic_facet Western Basin
genre Labrador Sea
North Atlantic
genre_facet Labrador Sea
North Atlantic
op_relation #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/264879
Postprint
http://dx.doi.org/10.1016/j.pocean.2014.11.006

Progress in Oceanography 131: 21–32 (2015)
0079-6611
http://hdl.handle.net/10261/110347
doi:10.1016/j.pocean.2014.11.006
op_rights open
op_doi https://doi.org/10.1016/j.pocean.2014.11.006
container_title Progress in Oceanography
container_volume 131
container_start_page 21
op_container_end_page 32
_version_ 1790602702050295808