Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel
A decadal warming trend of Antarctic Bottom Water flowing through the Vema Channel is reanalyzed. Our data base consists of 94 high precision, full depth stations from 19 visits to the Vema Sill plus twelve stopovers at two additional key locations. Originally a long-term temperature increase in the...
Published in: | Geophysical Research Letters |
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Language: | English |
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AGU (American Geophysical Union)
2007
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Online Access: | https://oceanrep.geomar.de/id/eprint/5777/ https://oceanrep.geomar.de/id/eprint/5777/1/grl23309.pdf https://doi.org/10.1029/2007GL030340 |
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ftoceanrep:oai:oceanrep.geomar.de:5777 2023-05-15T14:11:06+02:00 Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel Zenk, Walter Morozov, E. 2007 text https://oceanrep.geomar.de/id/eprint/5777/ https://oceanrep.geomar.de/id/eprint/5777/1/grl23309.pdf https://doi.org/10.1029/2007GL030340 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/5777/1/grl23309.pdf Zenk, W. and Morozov, E. (2007) Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel. Open Access Geophysical Research Letters, 34 (14). L14607. DOI 10.1029/2007GL030340 <https://doi.org/10.1029/2007GL030340>. doi:10.1029/2007GL030340 info:eu-repo/semantics/openAccess Article PeerReviewed 2007 ftoceanrep https://doi.org/10.1029/2007GL030340 2023-04-07T14:51:33Z A decadal warming trend of Antarctic Bottom Water flowing through the Vema Channel is reanalyzed. Our data base consists of 94 high precision, full depth stations from 19 visits to the Vema Sill plus twelve stopovers at two additional key locations. Originally a long-term temperature increase in the near-bottom jet was noted from 1992 onward, after a period of rather constant abyssal temperatures since 1972. From today's perspective the apparent stagnant temperature level until 1991 can be interpreted as a period of feeble rising in comparison with a perspicuous warming trend of 2.8 mK yr(-1) in the following 15 years. However, the clearly manifested temperature rise is superimposed with fluctuations. For the first time the available time series appears long enough to indicate an associated slight freshening of the bottom water. An attempt is made to trace the observed variability back to its source region in the Weddell Sea. Article in Journal/Newspaper Antarc* Antarctic Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Weddell Weddell Sea Geophysical Research Letters 34 14 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A decadal warming trend of Antarctic Bottom Water flowing through the Vema Channel is reanalyzed. Our data base consists of 94 high precision, full depth stations from 19 visits to the Vema Sill plus twelve stopovers at two additional key locations. Originally a long-term temperature increase in the near-bottom jet was noted from 1992 onward, after a period of rather constant abyssal temperatures since 1972. From today's perspective the apparent stagnant temperature level until 1991 can be interpreted as a period of feeble rising in comparison with a perspicuous warming trend of 2.8 mK yr(-1) in the following 15 years. However, the clearly manifested temperature rise is superimposed with fluctuations. For the first time the available time series appears long enough to indicate an associated slight freshening of the bottom water. An attempt is made to trace the observed variability back to its source region in the Weddell Sea. |
format |
Article in Journal/Newspaper |
author |
Zenk, Walter Morozov, E. |
spellingShingle |
Zenk, Walter Morozov, E. Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel |
author_facet |
Zenk, Walter Morozov, E. |
author_sort |
Zenk, Walter |
title |
Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel |
title_short |
Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel |
title_full |
Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel |
title_fullStr |
Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel |
title_full_unstemmed |
Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel |
title_sort |
decadal warming of the coldest antarctic bottom water flow through the vema channel |
publisher |
AGU (American Geophysical Union) |
publishDate |
2007 |
url |
https://oceanrep.geomar.de/id/eprint/5777/ https://oceanrep.geomar.de/id/eprint/5777/1/grl23309.pdf https://doi.org/10.1029/2007GL030340 |
geographic |
Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Weddell Sea |
genre_facet |
Antarc* Antarctic Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/5777/1/grl23309.pdf Zenk, W. and Morozov, E. (2007) Decadal warming of the coldest Antarctic Bottom Water flow through the Vema Channel. Open Access Geophysical Research Letters, 34 (14). L14607. DOI 10.1029/2007GL030340 <https://doi.org/10.1029/2007GL030340>. doi:10.1029/2007GL030340 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2007GL030340 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
14 |
_version_ |
1766283228843343872 |