Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea.
Antarctic Bottom Water (AABW) stores heat and gases over decades to centuries after contact with the atmosphere during formation on the Antarctic shelf and subsequent flow into the global deep ocean. Dense water from the western Ross Sea, a primary source of AABW, shows changes in water properties a...
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/wf6f-6t49 2023-07-23T04:15:10+02:00 Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea. Bowen, Melissa M. Fernandez, Denise Gordon, Arnold L. Huber, Bruce A. Castagno, Pasquale Falco, Pierpaolo Budillon, Giorgio Gunn, Kathryn L. Forcen-Vazquez, Aitana 2023 https://doi.org/10.7916/wf6f-6t49 English eng https://doi.org/10.7916/wf6f-6t49 Physical oceanography Oceanography Bottom water (Oceanography) Tides Articles 2023 ftcolumbiauniv https://doi.org/10.7916/wf6f-6t49 2023-07-01T22:20:35Z Antarctic Bottom Water (AABW) stores heat and gases over decades to centuries after contact with the atmosphere during formation on the Antarctic shelf and subsequent flow into the global deep ocean. Dense water from the western Ross Sea, a primary source of AABW, shows changes in water properties and volume over the last few decades. Here we show, using multiple years of moored observations, that the density and speed of the outflow are consistent with a release from the Drygalski Trough controlled by the density in Terra Nova Bay (the “accelerator”) and the tidal mixing (the “brake”). We suggest tides create two peaks in density and flow each year at the equinoxes and could cause changes of ~ 30% in the flow and density over the 18.6-year lunar nodal tide. Based on our dynamic model, we find tides can explain much of the decadal variability in the outflow with longer term changes likely driven by the density in Terra Nova Bay. Article in Journal/Newspaper Antarc* Antarctic Ross Sea Columbia University: Academic Commons Antarctic Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Ross Sea Terra Nova Bay The Antarctic |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Physical oceanography Oceanography Bottom water (Oceanography) Tides |
spellingShingle |
Physical oceanography Oceanography Bottom water (Oceanography) Tides Bowen, Melissa M. Fernandez, Denise Gordon, Arnold L. Huber, Bruce A. Castagno, Pasquale Falco, Pierpaolo Budillon, Giorgio Gunn, Kathryn L. Forcen-Vazquez, Aitana Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea. |
topic_facet |
Physical oceanography Oceanography Bottom water (Oceanography) Tides |
description |
Antarctic Bottom Water (AABW) stores heat and gases over decades to centuries after contact with the atmosphere during formation on the Antarctic shelf and subsequent flow into the global deep ocean. Dense water from the western Ross Sea, a primary source of AABW, shows changes in water properties and volume over the last few decades. Here we show, using multiple years of moored observations, that the density and speed of the outflow are consistent with a release from the Drygalski Trough controlled by the density in Terra Nova Bay (the “accelerator”) and the tidal mixing (the “brake”). We suggest tides create two peaks in density and flow each year at the equinoxes and could cause changes of ~ 30% in the flow and density over the 18.6-year lunar nodal tide. Based on our dynamic model, we find tides can explain much of the decadal variability in the outflow with longer term changes likely driven by the density in Terra Nova Bay. |
format |
Article in Journal/Newspaper |
author |
Bowen, Melissa M. Fernandez, Denise Gordon, Arnold L. Huber, Bruce A. Castagno, Pasquale Falco, Pierpaolo Budillon, Giorgio Gunn, Kathryn L. Forcen-Vazquez, Aitana |
author_facet |
Bowen, Melissa M. Fernandez, Denise Gordon, Arnold L. Huber, Bruce A. Castagno, Pasquale Falco, Pierpaolo Budillon, Giorgio Gunn, Kathryn L. Forcen-Vazquez, Aitana |
author_sort |
Bowen, Melissa M. |
title |
Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea. |
title_short |
Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea. |
title_full |
Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea. |
title_fullStr |
Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea. |
title_full_unstemmed |
Tides regulate the flow and density of Antarctic Bottom Water from the western Ross Sea. |
title_sort |
tides regulate the flow and density of antarctic bottom water from the western ross sea. |
publishDate |
2023 |
url |
https://doi.org/10.7916/wf6f-6t49 |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) |
geographic |
Antarctic Drygalski Ross Sea Terra Nova Bay The Antarctic |
geographic_facet |
Antarctic Drygalski Ross Sea Terra Nova Bay The Antarctic |
genre |
Antarc* Antarctic Ross Sea |
genre_facet |
Antarc* Antarctic Ross Sea |
op_relation |
https://doi.org/10.7916/wf6f-6t49 |
op_doi |
https://doi.org/10.7916/wf6f-6t49 |
_version_ |
1772189175871700992 |