Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S
The western boundary current system off Brazil is a key region for diagnosing variations of the Atlantic meridional overturning circulation (AMOC) and the southern subtropical cell. In July 2013 a mooring array was installed off the coast at 11°S similar to an array installed between 2000 and 2004 a...
Published in: | Geophysical Research Letters |
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AGU (American Geophysical Union)
2015
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Online Access: | https://oceanrep.geomar.de/id/eprint/29893/ https://oceanrep.geomar.de/id/eprint/29893/5/Hummels_et_al-2015-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/29893/2/grl53383-sup-0001-supinfo.docx https://doi.org/10.1002/2015GL065254 |
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ftoceanrep:oai:oceanrep.geomar.de:29893 2023-05-15T17:32:19+02:00 Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S Hummels, Rebecca Brandt, Peter Dengler, Marcus Fischer, Jürgen Araujo, Moacyr Veleda, Doris Durgadoo, Jonathan V. 2015-09-28 text https://oceanrep.geomar.de/id/eprint/29893/ https://oceanrep.geomar.de/id/eprint/29893/5/Hummels_et_al-2015-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/29893/2/grl53383-sup-0001-supinfo.docx https://doi.org/10.1002/2015GL065254 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/29893/5/Hummels_et_al-2015-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/29893/2/grl53383-sup-0001-supinfo.docx Hummels, R., Brandt, P. , Dengler, M. , Fischer, J. , Araujo, M., Veleda, D. and Durgadoo, J. V. (2015) Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S. Open Access Geophysical Research Letters, 42 (18). pp. 7615-7622. DOI 10.1002/2015GL065254 <https://doi.org/10.1002/2015GL065254>. doi:10.1002/2015GL065254 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2015 ftoceanrep https://doi.org/10.1002/2015GL065254 2023-04-07T15:21:05Z The western boundary current system off Brazil is a key region for diagnosing variations of the Atlantic meridional overturning circulation (AMOC) and the southern subtropical cell. In July 2013 a mooring array was installed off the coast at 11°S similar to an array installed between 2000 and 2004 at the same location. Here we present results from two research cruises and the first 10.5 months of moored observations in comparison to the observations a decade ago. Average transports of the North Brazil Undercurrent and the Deep Western Boundary Current (DWBC) have not changed between the observational periods. DWBC eddies that are predicted to disappear with a weakening AMOC are still present. Upper layer changes in salinity and oxygen within the last decade are consistent with an increased Agulhas leakage, while at depths water mass changes are likely related to changes in the North Atlantic as well as tropical circulation changes. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 42 18 7615 7622 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The western boundary current system off Brazil is a key region for diagnosing variations of the Atlantic meridional overturning circulation (AMOC) and the southern subtropical cell. In July 2013 a mooring array was installed off the coast at 11°S similar to an array installed between 2000 and 2004 at the same location. Here we present results from two research cruises and the first 10.5 months of moored observations in comparison to the observations a decade ago. Average transports of the North Brazil Undercurrent and the Deep Western Boundary Current (DWBC) have not changed between the observational periods. DWBC eddies that are predicted to disappear with a weakening AMOC are still present. Upper layer changes in salinity and oxygen within the last decade are consistent with an increased Agulhas leakage, while at depths water mass changes are likely related to changes in the North Atlantic as well as tropical circulation changes. |
format |
Article in Journal/Newspaper |
author |
Hummels, Rebecca Brandt, Peter Dengler, Marcus Fischer, Jürgen Araujo, Moacyr Veleda, Doris Durgadoo, Jonathan V. |
spellingShingle |
Hummels, Rebecca Brandt, Peter Dengler, Marcus Fischer, Jürgen Araujo, Moacyr Veleda, Doris Durgadoo, Jonathan V. Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S |
author_facet |
Hummels, Rebecca Brandt, Peter Dengler, Marcus Fischer, Jürgen Araujo, Moacyr Veleda, Doris Durgadoo, Jonathan V. |
author_sort |
Hummels, Rebecca |
title |
Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S |
title_short |
Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S |
title_full |
Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S |
title_fullStr |
Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S |
title_full_unstemmed |
Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S |
title_sort |
interannual to decadal changes in the western boundary circulation in the atlantic at 11°s |
publisher |
AGU (American Geophysical Union) |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/29893/ https://oceanrep.geomar.de/id/eprint/29893/5/Hummels_et_al-2015-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/29893/2/grl53383-sup-0001-supinfo.docx https://doi.org/10.1002/2015GL065254 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/29893/5/Hummels_et_al-2015-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/29893/2/grl53383-sup-0001-supinfo.docx Hummels, R., Brandt, P. , Dengler, M. , Fischer, J. , Araujo, M., Veleda, D. and Durgadoo, J. V. (2015) Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S. Open Access Geophysical Research Letters, 42 (18). pp. 7615-7622. DOI 10.1002/2015GL065254 <https://doi.org/10.1002/2015GL065254>. doi:10.1002/2015GL065254 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2015GL065254 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
18 |
container_start_page |
7615 |
op_container_end_page |
7622 |
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1766130366559551488 |