A twenty year reversal in water mass trends in the subtropical North Atlantic
Temperature and salinity changes have been compared along three repeat sections at 36°N in the North Atlantic. The principal changes, cooling of the upper waters and warming of the intermediate waters observed between 1959 and 1981, were reversed between 1981 and 2005. The controlling mechanisms for...
Published in: | Geophysical Research Letters |
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2007
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ftsouthampton:oai:eprints.soton.ac.uk:49734 2023-07-30T04:04:43+02:00 A twenty year reversal in water mass trends in the subtropical North Atlantic Leadbetter, S.J. Williams, R.G. McDonagh, E.L. 2007-06-26 https://eprints.soton.ac.uk/49734/ http://www.agu.org/pubs/crossref/2007/2007GL029957.shtml unknown Leadbetter, S.J., Williams, R.G. and McDonagh, E.L. (2007) A twenty year reversal in water mass trends in the subtropical North Atlantic. Geophysical Research Letters, 34 (12), L12608. (doi:10.1029/2007GL029957 <http://dx.doi.org/10.1029/2007GL029957>). Article PeerReviewed 2007 ftsouthampton https://doi.org/10.1029/2007GL029957 2023-07-09T20:54:24Z Temperature and salinity changes have been compared along three repeat sections at 36°N in the North Atlantic. The principal changes, cooling of the upper waters and warming of the intermediate waters observed between 1959 and 1981, were reversed between 1981 and 2005. The controlling mechanisms for the changes over the two time periods differed through the water column. Neutral density surfaces over the upper 800 m were firstly uplifted and secondly depressed by typically 50 m, which is broadly consistent with the changes in thermocline thickness implied by the temporal changes in Ekman pumping. In contrast, the intermediate waters (800–2500 m) firstly became warmer and saltier and secondly became cooler and fresher. This change in the intermediate waters was controlled by water mass changes along neutral density surfaces suggesting a change in the source waters, principally Labrador Sea Water and Mediterranean Outflow Water. Article in Journal/Newspaper Labrador Sea North Atlantic University of Southampton: e-Prints Soton Geophysical Research Letters 34 12 |
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Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Temperature and salinity changes have been compared along three repeat sections at 36°N in the North Atlantic. The principal changes, cooling of the upper waters and warming of the intermediate waters observed between 1959 and 1981, were reversed between 1981 and 2005. The controlling mechanisms for the changes over the two time periods differed through the water column. Neutral density surfaces over the upper 800 m were firstly uplifted and secondly depressed by typically 50 m, which is broadly consistent with the changes in thermocline thickness implied by the temporal changes in Ekman pumping. In contrast, the intermediate waters (800–2500 m) firstly became warmer and saltier and secondly became cooler and fresher. This change in the intermediate waters was controlled by water mass changes along neutral density surfaces suggesting a change in the source waters, principally Labrador Sea Water and Mediterranean Outflow Water. |
format |
Article in Journal/Newspaper |
author |
Leadbetter, S.J. Williams, R.G. McDonagh, E.L. |
spellingShingle |
Leadbetter, S.J. Williams, R.G. McDonagh, E.L. A twenty year reversal in water mass trends in the subtropical North Atlantic |
author_facet |
Leadbetter, S.J. Williams, R.G. McDonagh, E.L. |
author_sort |
Leadbetter, S.J. |
title |
A twenty year reversal in water mass trends in the subtropical North Atlantic |
title_short |
A twenty year reversal in water mass trends in the subtropical North Atlantic |
title_full |
A twenty year reversal in water mass trends in the subtropical North Atlantic |
title_fullStr |
A twenty year reversal in water mass trends in the subtropical North Atlantic |
title_full_unstemmed |
A twenty year reversal in water mass trends in the subtropical North Atlantic |
title_sort |
twenty year reversal in water mass trends in the subtropical north atlantic |
publishDate |
2007 |
url |
https://eprints.soton.ac.uk/49734/ http://www.agu.org/pubs/crossref/2007/2007GL029957.shtml |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_relation |
Leadbetter, S.J., Williams, R.G. and McDonagh, E.L. (2007) A twenty year reversal in water mass trends in the subtropical North Atlantic. Geophysical Research Letters, 34 (12), L12608. (doi:10.1029/2007GL029957 <http://dx.doi.org/10.1029/2007GL029957>). |
op_doi |
https://doi.org/10.1029/2007GL029957 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
12 |
_version_ |
1772816294372966400 |