Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge
Abstract Six-year records of ocean bottom water temperatures at two locations in an isolated, sedimented deep-water (∼4500 m) basin on the western flank of the mid-Atlantic Ridge reveal long periods (months to >1 year) of slow temperature rises punctuated by more rapid (∼1 month) cooling even...
Published in: | Communications Earth & Environment |
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2021
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Online Access: | http://dx.doi.org/10.1038/s43247-021-00297-2 https://www.nature.com/articles/s43247-021-00297-2.pdf https://www.nature.com/articles/s43247-021-00297-2 |
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crspringernat:10.1038/s43247-021-00297-2 2023-05-15T14:10:06+02:00 Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge Becker, Keir Thomson, Richard E. Davis, Earl E. Villinger, Heinrich Wheat, C. Geoffrey National Science Foundation Deutsche Forschungsgemeinschaft 2021 http://dx.doi.org/10.1038/s43247-021-00297-2 https://www.nature.com/articles/s43247-021-00297-2.pdf https://www.nature.com/articles/s43247-021-00297-2 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Communications Earth & Environment volume 2, issue 1 ISSN 2662-4435 General Earth and Planetary Sciences General Environmental Science journal-article 2021 crspringernat https://doi.org/10.1038/s43247-021-00297-2 2022-01-04T08:19:19Z Abstract Six-year records of ocean bottom water temperatures at two locations in an isolated, sedimented deep-water (∼4500 m) basin on the western flank of the mid-Atlantic Ridge reveal long periods (months to >1 year) of slow temperature rises punctuated by more rapid (∼1 month) cooling events. The temperature rises are consistent with a combination of gradual heating by the geothermal flux through the basin and by diapycnal mixing, while the sharper cooling events indicate displacement of heated bottom waters by incursions of cold, dense bottom water over the deepest part of the sill bounding the basin. Profiles of bottom water temperature, salinity, and oxygen content collected just before and after a cooling event show a distinct change in the water mass suggestive of an incursion of diluted Antarctic Bottom Water from the west. Our results reveal details of a mechanism for the transfer of geothermal heat and bottom water renewal that may be common on mid-ocean ridge flanks. Article in Journal/Newspaper Antarc* Antarctic Springer Nature (via Crossref) Antarctic Mid-Atlantic Ridge Communications Earth & Environment 2 1 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
General Earth and Planetary Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Environmental Science Becker, Keir Thomson, Richard E. Davis, Earl E. Villinger, Heinrich Wheat, C. Geoffrey Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
Abstract Six-year records of ocean bottom water temperatures at two locations in an isolated, sedimented deep-water (∼4500 m) basin on the western flank of the mid-Atlantic Ridge reveal long periods (months to >1 year) of slow temperature rises punctuated by more rapid (∼1 month) cooling events. The temperature rises are consistent with a combination of gradual heating by the geothermal flux through the basin and by diapycnal mixing, while the sharper cooling events indicate displacement of heated bottom waters by incursions of cold, dense bottom water over the deepest part of the sill bounding the basin. Profiles of bottom water temperature, salinity, and oxygen content collected just before and after a cooling event show a distinct change in the water mass suggestive of an incursion of diluted Antarctic Bottom Water from the west. Our results reveal details of a mechanism for the transfer of geothermal heat and bottom water renewal that may be common on mid-ocean ridge flanks. |
author2 |
National Science Foundation Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Becker, Keir Thomson, Richard E. Davis, Earl E. Villinger, Heinrich Wheat, C. Geoffrey |
author_facet |
Becker, Keir Thomson, Richard E. Davis, Earl E. Villinger, Heinrich Wheat, C. Geoffrey |
author_sort |
Becker, Keir |
title |
Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge |
title_short |
Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge |
title_full |
Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge |
title_fullStr |
Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge |
title_full_unstemmed |
Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge |
title_sort |
geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the mid-atlantic ridge |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s43247-021-00297-2 https://www.nature.com/articles/s43247-021-00297-2.pdf https://www.nature.com/articles/s43247-021-00297-2 |
geographic |
Antarctic Mid-Atlantic Ridge |
geographic_facet |
Antarctic Mid-Atlantic Ridge |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Communications Earth & Environment volume 2, issue 1 ISSN 2662-4435 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s43247-021-00297-2 |
container_title |
Communications Earth & Environment |
container_volume |
2 |
container_issue |
1 |
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1766282129218469888 |