Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean
Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACESNL 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 (Delta C-ant). Application of the ext...
Published in: | Biogeosciences |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2015
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Online Access: | https://hdl.handle.net/11370/1529f3ff-73f6-4d03-afa6-32fe3b958785 https://research.rug.nl/en/publications/1529f3ff-73f6-4d03-afa6-32fe3b958785 https://doi.org/10.5194/bg-12-1387-2015 https://pure.rug.nl/ws/files/50273724/Rapid_acidification_of_mode_and_intermediate_waters.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/1529f3ff-73f6-4d03-afa6-32fe3b958785 2024-06-02T07:57:46+00:00 Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean Salt, L.A. van Heuven, S.M.A.C. Claus, M.E. Jones, E.M. de Baar, H.J.W. 2015-03-05 application/pdf https://hdl.handle.net/11370/1529f3ff-73f6-4d03-afa6-32fe3b958785 https://research.rug.nl/en/publications/1529f3ff-73f6-4d03-afa6-32fe3b958785 https://doi.org/10.5194/bg-12-1387-2015 https://pure.rug.nl/ws/files/50273724/Rapid_acidification_of_mode_and_intermediate_waters.pdf eng eng https://research.rug.nl/en/publications/1529f3ff-73f6-4d03-afa6-32fe3b958785 info:eu-repo/semantics/openAccess Salt , L A , van Heuven , S M A C , Claus , M E , Jones , E M & de Baar , H J W 2015 , ' Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean ' , Biogeosciences , vol. 12 , no. 5 , pp. 1387-1401 . https://doi.org/10.5194/bg-12-1387-2015 ANTHROPOGENIC CO2 SOUTHERN-OCEAN NORTH-ATLANTIC INDIAN-OCEAN ATMOSPHERIC CO2 CARBONIC-ACID MASSES INCREASE SEA DISTRIBUTIONS article 2015 ftunigroningenpu https://doi.org/10.5194/bg-12-1387-2015 2024-05-07T19:48:36Z Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACESNL 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 (Delta C-ant). Application of the extended multilinear regression (eMLR) method shows that the Delta C-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 mu mol kg(-1) is found. South Atlantic Central Water (SACW) experienced the highest rate of increase in C-ant, at 0.99 +/- 0.14 mu mol 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 Delta C-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 mu mol 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 CO2 sink. Article in Journal/Newspaper Antarc* Antarctic Carbonic acid North Atlantic Southern Ocean University of Groningen research database Antarctic Indian Southern Ocean Biogeosciences 12 5 1387 1401 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
ANTHROPOGENIC CO2 SOUTHERN-OCEAN NORTH-ATLANTIC INDIAN-OCEAN ATMOSPHERIC CO2 CARBONIC-ACID MASSES INCREASE SEA DISTRIBUTIONS |
spellingShingle |
ANTHROPOGENIC CO2 SOUTHERN-OCEAN NORTH-ATLANTIC INDIAN-OCEAN ATMOSPHERIC CO2 CARBONIC-ACID MASSES INCREASE SEA DISTRIBUTIONS Salt, L.A. van Heuven, S.M.A.C. Claus, M.E. Jones, E.M. de Baar, H.J.W. Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean |
topic_facet |
ANTHROPOGENIC CO2 SOUTHERN-OCEAN NORTH-ATLANTIC INDIAN-OCEAN ATMOSPHERIC CO2 CARBONIC-ACID MASSES INCREASE SEA DISTRIBUTIONS |
description |
Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACESNL 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 (Delta C-ant). Application of the extended multilinear regression (eMLR) method shows that the Delta C-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 mu mol kg(-1) is found. South Atlantic Central Water (SACW) experienced the highest rate of increase in C-ant, at 0.99 +/- 0.14 mu mol 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 Delta C-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 mu mol 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 CO2 sink. |
format |
Article in Journal/Newspaper |
author |
Salt, L.A. van Heuven, S.M.A.C. Claus, M.E. Jones, E.M. de Baar, H.J.W. |
author_facet |
Salt, L.A. van Heuven, S.M.A.C. Claus, M.E. Jones, E.M. de Baar, H.J.W. |
author_sort |
Salt, L.A. |
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 |
publishDate |
2015 |
url |
https://hdl.handle.net/11370/1529f3ff-73f6-4d03-afa6-32fe3b958785 https://research.rug.nl/en/publications/1529f3ff-73f6-4d03-afa6-32fe3b958785 https://doi.org/10.5194/bg-12-1387-2015 https://pure.rug.nl/ws/files/50273724/Rapid_acidification_of_mode_and_intermediate_waters.pdf |
geographic |
Antarctic Indian Southern Ocean |
geographic_facet |
Antarctic Indian Southern Ocean |
genre |
Antarc* Antarctic Carbonic acid North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Carbonic acid North Atlantic Southern Ocean |
op_source |
Salt , L A , van Heuven , S M A C , Claus , M E , Jones , E M & de Baar , H J W 2015 , ' Rapid acidification of mode and intermediate waters in the southwestern Atlantic Ocean ' , Biogeosciences , vol. 12 , no. 5 , pp. 1387-1401 . https://doi.org/10.5194/bg-12-1387-2015 |
op_relation |
https://research.rug.nl/en/publications/1529f3ff-73f6-4d03-afa6-32fe3b958785 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-12-1387-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
5 |
container_start_page |
1387 |
op_container_end_page |
1401 |
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1800740958326751232 |