Trends of anthropogenic CO2 storage in North Atlantic water masses
19 páginas, 5 figuras, 3 tablas, 2 apéndices. A high-quality inorganic carbon system database, spanning over three decades (1981–2006) and comprising of 13 cruises, has allowed the applying of the φC°T method and coming up with estimates of the anthropogenic CO2 (Cant) stored in the main water masse...
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Online Access: | http://hdl.handle.net/10261/27135 https://doi.org/10.5194/bg-7-1789-2010 |
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ftcsic:oai:digital.csic.es:10261/27135 2024-02-11T10:05:16+01:00 Trends of anthropogenic CO2 storage in North Atlantic water masses Pérez, Fiz F. Vázquez Rodríguez, Marcos Mercier, Herlé Velo, A. Lherminier, Pascale Ríos, Aida F. 2010-05 4916960 bytes application/pdf http://hdl.handle.net/10261/27135 https://doi.org/10.5194/bg-7-1789-2010 en eng Copernicus Publications Publisher’s version http://dx.doi.org/10.5194/bg-7-1789-2010 Sí Biogeosciences 7(5): 1789-1807 (2010) 1726-4170 http://hdl.handle.net/10261/27135 doi:10.5194/bg-7-1789-2010 open artículo http://purl.org/coar/resource_type/c_6501 2010 ftcsic https://doi.org/10.5194/bg-7-1789-2010 2024-01-16T09:28:03Z 19 páginas, 5 figuras, 3 tablas, 2 apéndices. A high-quality inorganic carbon system database, spanning over three decades (1981–2006) and comprising of 13 cruises, has allowed the applying of the φC°T method and coming up with estimates of the anthropogenic CO2 (Cant) stored in the main water masses of the North Atlantic. In the studied region, strong convective processes convey surface properties, like Cant, into deeper ocean layers and grants this region an added oceanographic interest from the point of view of air-sea CO2 exchanges. Generally, a tendency for decreasing Cant storage rates towards the deep layers has been observed. In the Iberian Basin, the North Atlantic Deep Water has low Cant concentrations and negligible storage rates, while the North Atlantic Central Water in the upper layers shows the largest Cant values and the largest annual increase of its average concentration (1.13 ± 0.14 μmol kg−1 yr−1). This unmatched rate of change in the Cant concentration of the warm upper limb of the Meridional Overturning Circulation decreases towards the Irminger basin (0.68 ± 0.06 μmol kg−1 yr−1) due to the lowering of the buffering capacity. The mid and deep waters in the Irminger Sea show rather similar Cant concentration rates of increase (between 0.33 and 0.45 μmol kg−1 yr−1), whereas in the Iceland basin these layers seem to have been less affected by Cant. Overall, the Cant storage rates in the North Atlantic subpolar gyre during the first half of the 1990s, when a high North Atlantic Oscillation (NAO) phase was dominant, are ~48% higher than during the 1997–2006 low NAO phase that followed. This result suggests that a net decrease in the strength of the North Atlantic sink of atmospheric CO2 has taken place during the present decade. The changes in deep-water ventilation are the main driving processes causing this weakening of the North Atlantic CO2 sink. This work was developed and funded by the OVIDE research project from the French research institutions IFREMER and CNRS/INSU, by the European ... Article in Journal/Newspaper Iceland North Atlantic Deep Water North Atlantic North Atlantic oscillation Digital.CSIC (Spanish National Research Council) Irminger Basin ENVELOPE(-36.000,-36.000,61.000,61.000) Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Biogeosciences 7 5 1789 1807 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
19 páginas, 5 figuras, 3 tablas, 2 apéndices. A high-quality inorganic carbon system database, spanning over three decades (1981–2006) and comprising of 13 cruises, has allowed the applying of the φC°T method and coming up with estimates of the anthropogenic CO2 (Cant) stored in the main water masses of the North Atlantic. In the studied region, strong convective processes convey surface properties, like Cant, into deeper ocean layers and grants this region an added oceanographic interest from the point of view of air-sea CO2 exchanges. Generally, a tendency for decreasing Cant storage rates towards the deep layers has been observed. In the Iberian Basin, the North Atlantic Deep Water has low Cant concentrations and negligible storage rates, while the North Atlantic Central Water in the upper layers shows the largest Cant values and the largest annual increase of its average concentration (1.13 ± 0.14 μmol kg−1 yr−1). This unmatched rate of change in the Cant concentration of the warm upper limb of the Meridional Overturning Circulation decreases towards the Irminger basin (0.68 ± 0.06 μmol kg−1 yr−1) due to the lowering of the buffering capacity. The mid and deep waters in the Irminger Sea show rather similar Cant concentration rates of increase (between 0.33 and 0.45 μmol kg−1 yr−1), whereas in the Iceland basin these layers seem to have been less affected by Cant. Overall, the Cant storage rates in the North Atlantic subpolar gyre during the first half of the 1990s, when a high North Atlantic Oscillation (NAO) phase was dominant, are ~48% higher than during the 1997–2006 low NAO phase that followed. This result suggests that a net decrease in the strength of the North Atlantic sink of atmospheric CO2 has taken place during the present decade. The changes in deep-water ventilation are the main driving processes causing this weakening of the North Atlantic CO2 sink. This work was developed and funded by the OVIDE research project from the French research institutions IFREMER and CNRS/INSU, by the European ... |
format |
Article in Journal/Newspaper |
author |
Pérez, Fiz F. Vázquez Rodríguez, Marcos Mercier, Herlé Velo, A. Lherminier, Pascale Ríos, Aida F. |
spellingShingle |
Pérez, Fiz F. Vázquez Rodríguez, Marcos Mercier, Herlé Velo, A. Lherminier, Pascale Ríos, Aida F. Trends of anthropogenic CO2 storage in North Atlantic water masses |
author_facet |
Pérez, Fiz F. Vázquez Rodríguez, Marcos Mercier, Herlé Velo, A. Lherminier, Pascale Ríos, Aida F. |
author_sort |
Pérez, Fiz F. |
title |
Trends of anthropogenic CO2 storage in North Atlantic water masses |
title_short |
Trends of anthropogenic CO2 storage in North Atlantic water masses |
title_full |
Trends of anthropogenic CO2 storage in North Atlantic water masses |
title_fullStr |
Trends of anthropogenic CO2 storage in North Atlantic water masses |
title_full_unstemmed |
Trends of anthropogenic CO2 storage in North Atlantic water masses |
title_sort |
trends of anthropogenic co2 storage in north atlantic water masses |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
http://hdl.handle.net/10261/27135 https://doi.org/10.5194/bg-7-1789-2010 |
long_lat |
ENVELOPE(-36.000,-36.000,61.000,61.000) ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Basin Irminger Sea |
geographic_facet |
Irminger Basin Irminger Sea |
genre |
Iceland North Atlantic Deep Water North Atlantic North Atlantic oscillation |
genre_facet |
Iceland North Atlantic Deep Water North Atlantic North Atlantic oscillation |
op_relation |
Publisher’s version http://dx.doi.org/10.5194/bg-7-1789-2010 Sí Biogeosciences 7(5): 1789-1807 (2010) 1726-4170 http://hdl.handle.net/10261/27135 doi:10.5194/bg-7-1789-2010 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/bg-7-1789-2010 |
container_title |
Biogeosciences |
container_volume |
7 |
container_issue |
5 |
container_start_page |
1789 |
op_container_end_page |
1807 |
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1790602195295535104 |