Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean
Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACES-NL programme (2010–2011) were compared with historical data from 1994 to quantify the changes in the anthropogenic component of the total pool of dissolved inorganic carbon (ΔC ant ). Application of the extend...
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ftdoajarticles:oai:doaj.org/article:8aa3898f834d4552ba2876ec6ecb2430 2023-05-15T14:03:57+02:00 Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean L. A. Salt S. M. A. C. van Heuven M. E. Claus E. M. Jones H. J. W. de Baar 2015-03-01T00:00:00Z https://doi.org/10.5194/bg-12-1387-2015 https://doaj.org/article/8aa3898f834d4552ba2876ec6ecb2430 EN eng Copernicus Publications http://www.biogeosciences.net/12/1387/2015/bg-12-1387-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-1387-2015 https://doaj.org/article/8aa3898f834d4552ba2876ec6ecb2430 Biogeosciences, Vol 12, Iss 5, Pp 1387-1401 (2015) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/bg-12-1387-2015 2022-12-31T14:45:10Z Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACES-NL programme (2010–2011) were compared with historical data from 1994 to quantify the changes in the anthropogenic component of the total pool of dissolved inorganic carbon (ΔC ant ). Application of the extended multi-linear regression (eMLR) method shows that the ΔC ant from 1994 to 2011 has largely remained confined to the upper 1000 dbar. The greatest changes occur in the upper 200 dbar in the Subantarctic Zone (SAZ), where a maximum increase of 37 μmol kg −1 is found. South Atlantic Central Water (SACW) experienced the highest rate of increase in C ant , at 0.99 ± 0.14 μmol kg −1 yr −1 , resulting in a maximum rate of decrease in pH of 0.0016 yr −1 . The highest rates of acidification relative to ΔC ant , however, were found in Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW). The low buffering capacity of SAMW and AAIW combined with their relatively high rates of C ant , increase of 0.53 ± 0.11 and 0.36 ± 0.06 μmol kg −1 yr −1 , respectively, has lead to rapid acidification in the SAZ, and will continue to do so whilst simultaneously reducing the chemical buffering capacity of this significant CO 2 sink. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic Biogeosciences 12 5 1387 1401 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 L. A. Salt S. M. A. C. van Heuven M. E. Claus E. M. Jones H. J. W. de Baar Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACES-NL programme (2010–2011) were compared with historical data from 1994 to quantify the changes in the anthropogenic component of the total pool of dissolved inorganic carbon (ΔC ant ). Application of the extended multi-linear regression (eMLR) method shows that the ΔC ant from 1994 to 2011 has largely remained confined to the upper 1000 dbar. The greatest changes occur in the upper 200 dbar in the Subantarctic Zone (SAZ), where a maximum increase of 37 μmol kg −1 is found. South Atlantic Central Water (SACW) experienced the highest rate of increase in C ant , at 0.99 ± 0.14 μmol kg −1 yr −1 , resulting in a maximum rate of decrease in pH of 0.0016 yr −1 . The highest rates of acidification relative to ΔC ant , however, were found in Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW). The low buffering capacity of SAMW and AAIW combined with their relatively high rates of C ant , increase of 0.53 ± 0.11 and 0.36 ± 0.06 μmol kg −1 yr −1 , respectively, has lead to rapid acidification in the SAZ, and will continue to do so whilst simultaneously reducing the chemical buffering capacity of this significant CO 2 sink. |
format |
Article in Journal/Newspaper |
author |
L. A. Salt S. M. A. C. van Heuven M. E. Claus E. M. Jones H. J. W. de Baar |
author_facet |
L. A. Salt S. M. A. C. van Heuven M. E. Claus E. M. Jones H. J. W. de Baar |
author_sort |
L. A. Salt |
title |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_short |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_full |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_fullStr |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_full_unstemmed |
Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
title_sort |
rapid acidification of mode and intermediate waters in the southwestern atlantic ocean |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-1387-2015 https://doaj.org/article/8aa3898f834d4552ba2876ec6ecb2430 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Biogeosciences, Vol 12, Iss 5, Pp 1387-1401 (2015) |
op_relation |
http://www.biogeosciences.net/12/1387/2015/bg-12-1387-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-1387-2015 https://doaj.org/article/8aa3898f834d4552ba2876ec6ecb2430 |
op_doi |
https://doi.org/10.5194/bg-12-1387-2015 |
container_title |
Biogeosciences |
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12 |
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5 |
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1387 |
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1401 |
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1766274857327132672 |