Hydraulically Controlled Bottom Flow in the Orkney Passage
Supercritical hydraulically controlled overflow of Antarctic Bottom Water from the Weddell Sea has been observed in the Orkney Passage during field measurements in February 2022. The Orkney Passage is the main pathway for the densest layer of Antarctic Bottom Water flow from the Weddell Sea to the S...
Published in: | Water |
---|---|
Main Authors: | , , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2022
|
Subjects: | |
Online Access: | https://doi.org/10.3390/w14193088 |
id |
ftmdpi:oai:mdpi.com:/2073-4441/14/19/3088/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2073-4441/14/19/3088/ 2023-08-20T04:01:34+02:00 Hydraulically Controlled Bottom Flow in the Orkney Passage Eugene G. Morozov Dmitry I. Frey Oleg A. Zuev Manuel G. Velarde Viktor A. Krechik Rinat Z. Mukhametianov agris 2022-10-01 application/pdf https://doi.org/10.3390/w14193088 EN eng Multidisciplinary Digital Publishing Institute Oceans and Coastal Zones https://dx.doi.org/10.3390/w14193088 https://creativecommons.org/licenses/by/4.0/ Water; Volume 14; Issue 19; Pages: 3088 Orkney Passage hydraulic control subcritical supercritical flows Text 2022 ftmdpi https://doi.org/10.3390/w14193088 2023-08-01T06:43:12Z Supercritical hydraulically controlled overflow of Antarctic Bottom Water from the Weddell Sea has been observed in the Orkney Passage during field measurements in February 2022. The Orkney Passage is the main pathway for the densest layer of Antarctic Bottom Water flow from the Weddell Sea to the Scotia Sea. The bottom current overflows the sill across the passage and flows down from the crest of the sill at 3600 m deeper than 4000 m. The descending flow accelerates because of the difference in the height of the sill and its foot. An estimate of the Froude number of this flow was greater than unity. Near the foot of the slope the kinetic energy of the flow becomes insufficient to continue moving in this regime. The flow slows down, and strong mixing and warming of the bottom water occurs due to the exchange with the surrounding waters. This hydrodynamic phenomenon is called supercritical hydraulically controlled flow. However, the flow of bottom water continues further and eventually fills the abyssal depths of the Atlantic. Text Antarc* Antarctic Scotia Sea Weddell Sea MDPI Open Access Publishing Antarctic Weddell Sea Scotia Sea Weddell Water 14 19 3088 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Orkney Passage hydraulic control subcritical supercritical flows |
spellingShingle |
Orkney Passage hydraulic control subcritical supercritical flows Eugene G. Morozov Dmitry I. Frey Oleg A. Zuev Manuel G. Velarde Viktor A. Krechik Rinat Z. Mukhametianov Hydraulically Controlled Bottom Flow in the Orkney Passage |
topic_facet |
Orkney Passage hydraulic control subcritical supercritical flows |
description |
Supercritical hydraulically controlled overflow of Antarctic Bottom Water from the Weddell Sea has been observed in the Orkney Passage during field measurements in February 2022. The Orkney Passage is the main pathway for the densest layer of Antarctic Bottom Water flow from the Weddell Sea to the Scotia Sea. The bottom current overflows the sill across the passage and flows down from the crest of the sill at 3600 m deeper than 4000 m. The descending flow accelerates because of the difference in the height of the sill and its foot. An estimate of the Froude number of this flow was greater than unity. Near the foot of the slope the kinetic energy of the flow becomes insufficient to continue moving in this regime. The flow slows down, and strong mixing and warming of the bottom water occurs due to the exchange with the surrounding waters. This hydrodynamic phenomenon is called supercritical hydraulically controlled flow. However, the flow of bottom water continues further and eventually fills the abyssal depths of the Atlantic. |
format |
Text |
author |
Eugene G. Morozov Dmitry I. Frey Oleg A. Zuev Manuel G. Velarde Viktor A. Krechik Rinat Z. Mukhametianov |
author_facet |
Eugene G. Morozov Dmitry I. Frey Oleg A. Zuev Manuel G. Velarde Viktor A. Krechik Rinat Z. Mukhametianov |
author_sort |
Eugene G. Morozov |
title |
Hydraulically Controlled Bottom Flow in the Orkney Passage |
title_short |
Hydraulically Controlled Bottom Flow in the Orkney Passage |
title_full |
Hydraulically Controlled Bottom Flow in the Orkney Passage |
title_fullStr |
Hydraulically Controlled Bottom Flow in the Orkney Passage |
title_full_unstemmed |
Hydraulically Controlled Bottom Flow in the Orkney Passage |
title_sort |
hydraulically controlled bottom flow in the orkney passage |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/w14193088 |
op_coverage |
agris |
geographic |
Antarctic Weddell Sea Scotia Sea Weddell |
geographic_facet |
Antarctic Weddell Sea Scotia Sea Weddell |
genre |
Antarc* Antarctic Scotia Sea Weddell Sea |
genre_facet |
Antarc* Antarctic Scotia Sea Weddell Sea |
op_source |
Water; Volume 14; Issue 19; Pages: 3088 |
op_relation |
Oceans and Coastal Zones https://dx.doi.org/10.3390/w14193088 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w14193088 |
container_title |
Water |
container_volume |
14 |
container_issue |
19 |
container_start_page |
3088 |
_version_ |
1774724814136672256 |