Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015)
We present a 13 year (2002-2015) semimonthly time series of the partial pressure of CO₂ in surface water (pCO₂surf) and other carbonate system parameters from the Drake Passage. This record shows a clear increase in the magnitude of the sea-air pCO₂ gradient, indicating strengthening of the CO₂ sink...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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John Wiley & Sons
2015
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-324 https://doi.org/10.1002/2015GL065194 |
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ftncar:oai:drupal-site.org:articles_17634 2023-09-05T13:14:09+02:00 Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015) Munro, David (author) Lovenduski, Nicole (author) Takahashi, Taro (author) Stephens, Britton (author) Newberger, Timothy (author) Sweeney, Colm (author) 2015-09-28 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-324 https://doi.org/10.1002/2015GL065194 en eng John Wiley & Sons Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-324 doi:10.1002/2015GL065194 ark:/85065/d7cf9rfc Copyright 2015 American Geophysical Union. Text article 2015 ftncar https://doi.org/10.1002/2015GL065194 2023-08-14T18:44:20Z We present a 13 year (2002-2015) semimonthly time series of the partial pressure of CO₂ in surface water (pCO₂surf) and other carbonate system parameters from the Drake Passage. This record shows a clear increase in the magnitude of the sea-air pCO₂ gradient, indicating strengthening of the CO₂ sink in agreement with recent large-scale analyses of the world oceans. The rate of increase in pCO₂surf north of the Antarctic Polar Front (APF) is similar to the atmospheric pCO₂ (pCO₂atm) trend, whereas the pCO₂surf increase south of the APF is slower than the pCO₂atm trend. The high-frequency surface observations indicate that an absence of a winter increase in total CO₂ (TCO₂) and cooling summer sea surface temperatures are largely responsible for increasing CO₂ uptake south of the APF. Muted winter trends in surface TCO₂ also provide temporary stability to the carbonate system that is already close to undersaturation with respect to aragonite. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Southern Ocean OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Drake Passage Southern Ocean The Antarctic Geophysical Research Letters 42 18 7623 7630 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
We present a 13 year (2002-2015) semimonthly time series of the partial pressure of CO₂ in surface water (pCO₂surf) and other carbonate system parameters from the Drake Passage. This record shows a clear increase in the magnitude of the sea-air pCO₂ gradient, indicating strengthening of the CO₂ sink in agreement with recent large-scale analyses of the world oceans. The rate of increase in pCO₂surf north of the Antarctic Polar Front (APF) is similar to the atmospheric pCO₂ (pCO₂atm) trend, whereas the pCO₂surf increase south of the APF is slower than the pCO₂atm trend. The high-frequency surface observations indicate that an absence of a winter increase in total CO₂ (TCO₂) and cooling summer sea surface temperatures are largely responsible for increasing CO₂ uptake south of the APF. Muted winter trends in surface TCO₂ also provide temporary stability to the carbonate system that is already close to undersaturation with respect to aragonite. |
author2 |
Munro, David (author) Lovenduski, Nicole (author) Takahashi, Taro (author) Stephens, Britton (author) Newberger, Timothy (author) Sweeney, Colm (author) |
format |
Article in Journal/Newspaper |
title |
Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015) |
spellingShingle |
Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015) |
title_short |
Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015) |
title_full |
Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015) |
title_fullStr |
Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015) |
title_full_unstemmed |
Recent evidence for a strengthening CO₂ sink in the Southern Ocean from carbonate system measurements in the Drake Passage (2002-2015) |
title_sort |
recent evidence for a strengthening co₂ sink in the southern ocean from carbonate system measurements in the drake passage (2002-2015) |
publisher |
John Wiley & Sons |
publishDate |
2015 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-324 https://doi.org/10.1002/2015GL065194 |
geographic |
Antarctic Drake Passage Southern Ocean The Antarctic |
geographic_facet |
Antarctic Drake Passage Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Southern Ocean |
op_relation |
Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-022-324 doi:10.1002/2015GL065194 ark:/85065/d7cf9rfc |
op_rights |
Copyright 2015 American Geophysical Union. |
op_doi |
https://doi.org/10.1002/2015GL065194 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
18 |
container_start_page |
7623 |
op_container_end_page |
7630 |
_version_ |
1776205196232228864 |