Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean
We study low-frequency properties of the Antarctic Bottom Water (AABW) flow through the Kane Gap (9° N) in the Atlantic Ocean. The measurements in the Kane Gap include five visits with CTD (Conductivity-Temperature-Depth) sections in 2009–2012 and a year-long record of currents on a mooring using th...
Published in: | Ocean Science |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/os-9-825-2013 https://os.copernicus.org/articles/9/825/2013/ |
id |
ftcopernicus:oai:publications.copernicus.org:os18808 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:os18808 2023-05-15T13:54:27+02:00 Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean Morozov, E. G. Tarakanov, R. Y. Haren, H. 2018-01-15 application/pdf https://doi.org/10.5194/os-9-825-2013 https://os.copernicus.org/articles/9/825/2013/ eng eng doi:10.5194/os-9-825-2013 https://os.copernicus.org/articles/9/825/2013/ eISSN: 1812-0792 Text 2018 ftcopernicus https://doi.org/10.5194/os-9-825-2013 2020-07-20T16:25:21Z We study low-frequency properties of the Antarctic Bottom Water (AABW) flow through the Kane Gap (9° N) in the Atlantic Ocean. The measurements in the Kane Gap include five visits with CTD (Conductivity-Temperature-Depth) sections in 2009–2012 and a year-long record of currents on a mooring using three AquaDopp current meters. We found an alternating regime of flow, which changes direction several times during a year. The seasonal signal seems to dominate. The maximum daily average values of southerly velocities reach 0.20 m s −1 , while the greatest north-northwesterly velocity is as high as 0.15 m s −1 . The velocity and transport at the bottom are aligned along the slope of a local hill near the southwestern side of the gap. The distribution of velocity directions at the upper boundary of AABW is wider. The transport of AABW (Θ < 1.9 °C) based on the mooring and LADCP (Lowered Acoustic Doppler Current Profiler) data varies approximately within ±0.35 Sv in the northern and southern directions. The annual mean AABW transport through the Kane Gap is almost zero. Text Antarc* Antarctic Copernicus Publications: E-Journals Antarctic Kane ENVELOPE(-63.038,-63.038,-73.952,-73.952) The Antarctic Ocean Science 9 5 825 835 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
We study low-frequency properties of the Antarctic Bottom Water (AABW) flow through the Kane Gap (9° N) in the Atlantic Ocean. The measurements in the Kane Gap include five visits with CTD (Conductivity-Temperature-Depth) sections in 2009–2012 and a year-long record of currents on a mooring using three AquaDopp current meters. We found an alternating regime of flow, which changes direction several times during a year. The seasonal signal seems to dominate. The maximum daily average values of southerly velocities reach 0.20 m s −1 , while the greatest north-northwesterly velocity is as high as 0.15 m s −1 . The velocity and transport at the bottom are aligned along the slope of a local hill near the southwestern side of the gap. The distribution of velocity directions at the upper boundary of AABW is wider. The transport of AABW (Θ < 1.9 °C) based on the mooring and LADCP (Lowered Acoustic Doppler Current Profiler) data varies approximately within ±0.35 Sv in the northern and southern directions. The annual mean AABW transport through the Kane Gap is almost zero. |
format |
Text |
author |
Morozov, E. G. Tarakanov, R. Y. Haren, H. |
spellingShingle |
Morozov, E. G. Tarakanov, R. Y. Haren, H. Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean |
author_facet |
Morozov, E. G. Tarakanov, R. Y. Haren, H. |
author_sort |
Morozov, E. G. |
title |
Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean |
title_short |
Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean |
title_full |
Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean |
title_fullStr |
Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean |
title_full_unstemmed |
Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean |
title_sort |
transport of antarctic bottom water through the kane gap, tropical ne atlantic ocean |
publishDate |
2018 |
url |
https://doi.org/10.5194/os-9-825-2013 https://os.copernicus.org/articles/9/825/2013/ |
long_lat |
ENVELOPE(-63.038,-63.038,-73.952,-73.952) |
geographic |
Antarctic Kane The Antarctic |
geographic_facet |
Antarctic Kane The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
eISSN: 1812-0792 |
op_relation |
doi:10.5194/os-9-825-2013 https://os.copernicus.org/articles/9/825/2013/ |
op_doi |
https://doi.org/10.5194/os-9-825-2013 |
container_title |
Ocean Science |
container_volume |
9 |
container_issue |
5 |
container_start_page |
825 |
op_container_end_page |
835 |
_version_ |
1766260374388080640 |