Cooling and ventilating the abyssal ocean
The abyssal ocean is filled with cold, dense waters that sink along the Antarctic continental slope and overflow sills that lie south of the Nordic Seas. Recent integrations of chlorofluorocarbon‐11 (CFC) measurements are similar in Antarctic Bottom Water (AABW) and in lower North Atlantic Deep Wate...
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ftoceanrep:oai:oceanrep.geomar.de:1609 2024-09-15T17:40:58+00:00 Cooling and ventilating the abyssal ocean Orsi, A. Jacobs, S. Gordon, A. Visbeck, Martin 2001 text https://oceanrep.geomar.de/id/eprint/1609/ https://oceanrep.geomar.de/id/eprint/1609/1/2001GL012830.pdf https://doi.org/10.1029/2001GL012830 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/1609/1/2001GL012830.pdf Orsi, A., Jacobs, S., Gordon, A. and Visbeck, M. (2001) Cooling and ventilating the abyssal ocean. Open Access Geophysical Research Letters, 28 . pp. 2923-2926. DOI 10.1029/2001GL012830 <https://doi.org/10.1029/2001GL012830>. doi:10.1029/2001GL012830 info:eu-repo/semantics/openAccess Article PeerReviewed 2001 ftoceanrep https://doi.org/10.1029/2001GL012830 2024-09-04T05:04:40Z The abyssal ocean is filled with cold, dense waters that sink along the Antarctic continental slope and overflow sills that lie south of the Nordic Seas. Recent integrations of chlorofluorocarbon‐11 (CFC) measurements are similar in Antarctic Bottom Water (AABW) and in lower North Atlantic Deep Water (NADW), but Antarctic inputs are ≈ 2°C colder than their northern counterparts. This indicates comparable ventilation rates from both polar regions, and accounts for the Southern Ocean dominance over abyssal cooling. The decadal CFC‐based estimates of recent ventilation are consistent with other hydrographic observations and with longer‐term radiocarbon data, but not with hypotheses of a 20th‐century slowdown in the rate of AABW formation. Significant variability is not precluded by the available ocean measurements, however, and interannual to decadal changes are increasingly evident at high latitudes. Article in Journal/Newspaper Antarc* Antarctic NADW Nordic Seas North Atlantic Deep Water North Atlantic Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 28 15 2923 2926 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The abyssal ocean is filled with cold, dense waters that sink along the Antarctic continental slope and overflow sills that lie south of the Nordic Seas. Recent integrations of chlorofluorocarbon‐11 (CFC) measurements are similar in Antarctic Bottom Water (AABW) and in lower North Atlantic Deep Water (NADW), but Antarctic inputs are ≈ 2°C colder than their northern counterparts. This indicates comparable ventilation rates from both polar regions, and accounts for the Southern Ocean dominance over abyssal cooling. The decadal CFC‐based estimates of recent ventilation are consistent with other hydrographic observations and with longer‐term radiocarbon data, but not with hypotheses of a 20th‐century slowdown in the rate of AABW formation. Significant variability is not precluded by the available ocean measurements, however, and interannual to decadal changes are increasingly evident at high latitudes. |
format |
Article in Journal/Newspaper |
author |
Orsi, A. Jacobs, S. Gordon, A. Visbeck, Martin |
spellingShingle |
Orsi, A. Jacobs, S. Gordon, A. Visbeck, Martin Cooling and ventilating the abyssal ocean |
author_facet |
Orsi, A. Jacobs, S. Gordon, A. Visbeck, Martin |
author_sort |
Orsi, A. |
title |
Cooling and ventilating the abyssal ocean |
title_short |
Cooling and ventilating the abyssal ocean |
title_full |
Cooling and ventilating the abyssal ocean |
title_fullStr |
Cooling and ventilating the abyssal ocean |
title_full_unstemmed |
Cooling and ventilating the abyssal ocean |
title_sort |
cooling and ventilating the abyssal ocean |
publisher |
AGU (American Geophysical Union) |
publishDate |
2001 |
url |
https://oceanrep.geomar.de/id/eprint/1609/ https://oceanrep.geomar.de/id/eprint/1609/1/2001GL012830.pdf https://doi.org/10.1029/2001GL012830 |
genre |
Antarc* Antarctic NADW Nordic Seas North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic NADW Nordic Seas North Atlantic Deep Water North Atlantic Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/1609/1/2001GL012830.pdf Orsi, A., Jacobs, S., Gordon, A. and Visbeck, M. (2001) Cooling and ventilating the abyssal ocean. Open Access Geophysical Research Letters, 28 . pp. 2923-2926. DOI 10.1029/2001GL012830 <https://doi.org/10.1029/2001GL012830>. doi:10.1029/2001GL012830 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2001GL012830 |
container_title |
Geophysical Research Letters |
container_volume |
28 |
container_issue |
15 |
container_start_page |
2923 |
op_container_end_page |
2926 |
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1810487036644163584 |