Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic
The excess heat absorbed from the atmosphere has increased the temperature in the upper layers of the ocean (<2,000 m). In the abyss, infrequently repeated ship sections, deep Argo float measurements, and sparse moored observations have found signs of warming in the Southwest Atlantic, possibly l...
Published in: | Geophysical Research Letters |
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Language: | English |
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AGU (American Geophysical Union)
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/54268/ https://oceanrep.geomar.de/id/eprint/54268/1/2021GL094709.pdf https://doi.org/10.1029/2021GL094709 |
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ftoceanrep:oai:oceanrep.geomar.de:54268 2024-02-11T09:58:39+01:00 Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic Campos, Edmo J. D. Caspel, Mathias C. Zenk, Walter Morozov, Eugene G. Frey, Dmitry I. Piola, Alberto R. Meinen, Christopher S. Sato, Olga T. Perez, Renellys C. Dong, Shenfu 2021-10-16 text https://oceanrep.geomar.de/id/eprint/54268/ https://oceanrep.geomar.de/id/eprint/54268/1/2021GL094709.pdf https://doi.org/10.1029/2021GL094709 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/54268/1/2021GL094709.pdf Campos, E. J. D. , Caspel, M. C., Zenk, W., Morozov, E. G. , Frey, D. I. , Piola, A. R. , Meinen, C. S. , Sato, O. T. , Perez, R. C. and Dong, S. (2021) Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic. Open Access Geophysical Research Letters, 48 (19). Art.Nr. e2021GL094709. DOI 10.1029/2021GL094709 <https://doi.org/10.1029/2021GL094709>. doi:10.1029/2021GL094709 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1029/2021GL094709 2024-01-15T00:24:17Z The excess heat absorbed from the atmosphere has increased the temperature in the upper layers of the ocean (<2,000 m). In the abyss, infrequently repeated ship sections, deep Argo float measurements, and sparse moored observations have found signs of warming in the Southwest Atlantic, possibly linked to changes in the Weddell Sea. We present a new moored temperature time series sampled near the bottom in the Vema Channel, from February 2019 to August 2020. Together with historical data, the combined record confirms the warming of the abyssal waters, with an increase of 0.059°C in potential temperature between January 1991 and August 2020, embedded within intense high-frequency variability. Moreover, the data suggest the possibility of an accelerated warming, with a change in the temperature trend from 0.0016°C yr−1, between the early 1990s and 2005, to 0.0026°C yr−1 afterwards. Article in Journal/Newspaper Antarc* Antarctic Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Weddell Sea Weddell Geophysical Research Letters 48 19 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The excess heat absorbed from the atmosphere has increased the temperature in the upper layers of the ocean (<2,000 m). In the abyss, infrequently repeated ship sections, deep Argo float measurements, and sparse moored observations have found signs of warming in the Southwest Atlantic, possibly linked to changes in the Weddell Sea. We present a new moored temperature time series sampled near the bottom in the Vema Channel, from February 2019 to August 2020. Together with historical data, the combined record confirms the warming of the abyssal waters, with an increase of 0.059°C in potential temperature between January 1991 and August 2020, embedded within intense high-frequency variability. Moreover, the data suggest the possibility of an accelerated warming, with a change in the temperature trend from 0.0016°C yr−1, between the early 1990s and 2005, to 0.0026°C yr−1 afterwards. |
format |
Article in Journal/Newspaper |
author |
Campos, Edmo J. D. Caspel, Mathias C. Zenk, Walter Morozov, Eugene G. Frey, Dmitry I. Piola, Alberto R. Meinen, Christopher S. Sato, Olga T. Perez, Renellys C. Dong, Shenfu |
spellingShingle |
Campos, Edmo J. D. Caspel, Mathias C. Zenk, Walter Morozov, Eugene G. Frey, Dmitry I. Piola, Alberto R. Meinen, Christopher S. Sato, Olga T. Perez, Renellys C. Dong, Shenfu Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic |
author_facet |
Campos, Edmo J. D. Caspel, Mathias C. Zenk, Walter Morozov, Eugene G. Frey, Dmitry I. Piola, Alberto R. Meinen, Christopher S. Sato, Olga T. Perez, Renellys C. Dong, Shenfu |
author_sort |
Campos, Edmo J. D. |
title |
Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic |
title_short |
Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic |
title_full |
Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic |
title_fullStr |
Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic |
title_full_unstemmed |
Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic |
title_sort |
warming trend in antarctic bottom water in the vema channel in the south atlantic |
publisher |
AGU (American Geophysical Union) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/54268/ https://oceanrep.geomar.de/id/eprint/54268/1/2021GL094709.pdf https://doi.org/10.1029/2021GL094709 |
geographic |
Antarctic Weddell Sea Weddell |
geographic_facet |
Antarctic Weddell Sea Weddell |
genre |
Antarc* Antarctic Weddell Sea |
genre_facet |
Antarc* Antarctic Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/54268/1/2021GL094709.pdf Campos, E. J. D. , Caspel, M. C., Zenk, W., Morozov, E. G. , Frey, D. I. , Piola, A. R. , Meinen, C. S. , Sato, O. T. , Perez, R. C. and Dong, S. (2021) Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic. Open Access Geophysical Research Letters, 48 (19). Art.Nr. e2021GL094709. DOI 10.1029/2021GL094709 <https://doi.org/10.1029/2021GL094709>. doi:10.1029/2021GL094709 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021GL094709 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
19 |
_version_ |
1790594363515994112 |