Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements
This study examines the seasonal evolution of Cape Darnley Bottom Water (CDBW), using the results of mooring and hydrographic measurements in the slope region off Cape Darnley in 2008–2009 and 2013–2014. Newly formed CDBW began reaching the western and nearshore part of the slope region off Cape Dar...
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Online Access: | https://doi.org/10.3389/fmars.2021.657119 https://doaj.org/article/864766caac184037b555e1e1a3813944 |
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ftdoajarticles:oai:doaj.org/article:864766caac184037b555e1e1a3813944 2023-05-15T13:36:51+02:00 Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements Genta Mizuta Yasushi Fukamachi Daisuke Simizu Yoshimasa Matsumura Yujiro Kitade Daisuke Hirano Masakazu Fujii Yoshifumi Nogi Kay I. Ohshima 2021-08-01T00:00:00Z https://doi.org/10.3389/fmars.2021.657119 https://doaj.org/article/864766caac184037b555e1e1a3813944 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2021.657119/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.657119 https://doaj.org/article/864766caac184037b555e1e1a3813944 Frontiers in Marine Science, Vol 8 (2021) sea ice seasonal evolution mooring measurement Cape Darnley Bottom Water Antarctic Bottom Water Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2021.657119 2022-12-31T09:53:13Z This study examines the seasonal evolution of Cape Darnley Bottom Water (CDBW), using the results of mooring and hydrographic measurements in the slope region off Cape Darnley in 2008–2009 and 2013–2014. Newly formed CDBW began reaching the western and nearshore part of the slope region off Cape Darnley in April, spread to the offshore and eastern part in May, and reached the easternmost part in September. The potential temperature and salinity decreased and the neutral density increased when newly formed CDBW reached mooring sites. Potential temperature-salinity properties of CDBW changed over time and location. The salinity of the source water of CDBW estimated from potential temperature-salinity diagrams started to increase at a nearshore mooring in late April, which is about 2 months after the onset of sea-ice production, and continued to increase during the ice production season. It is most probable that the accumulation of brine in the Cape Darnley polynya produces the seasonal variation of potential temperature-salinity properties of CDBW. Two types of CDBW were identified. Cold and less saline CDBW and warm and saline CDBW were present in Wild and Daly Canyons, respectively. This indicates that the salinity of the source water of CDBW increased in the westward direction. CDBW exhibited short-term variability induced by baroclinic instability. Article in Journal/Newspaper Antarc* Antarctic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Daly ENVELOPE(63.761,63.761,-67.513,-67.513) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) Frontiers in Marine Science 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sea ice seasonal evolution mooring measurement Cape Darnley Bottom Water Antarctic Bottom Water Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
sea ice seasonal evolution mooring measurement Cape Darnley Bottom Water Antarctic Bottom Water Science Q General. Including nature conservation geographical distribution QH1-199.5 Genta Mizuta Yasushi Fukamachi Daisuke Simizu Yoshimasa Matsumura Yujiro Kitade Daisuke Hirano Masakazu Fujii Yoshifumi Nogi Kay I. Ohshima Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements |
topic_facet |
sea ice seasonal evolution mooring measurement Cape Darnley Bottom Water Antarctic Bottom Water Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
This study examines the seasonal evolution of Cape Darnley Bottom Water (CDBW), using the results of mooring and hydrographic measurements in the slope region off Cape Darnley in 2008–2009 and 2013–2014. Newly formed CDBW began reaching the western and nearshore part of the slope region off Cape Darnley in April, spread to the offshore and eastern part in May, and reached the easternmost part in September. The potential temperature and salinity decreased and the neutral density increased when newly formed CDBW reached mooring sites. Potential temperature-salinity properties of CDBW changed over time and location. The salinity of the source water of CDBW estimated from potential temperature-salinity diagrams started to increase at a nearshore mooring in late April, which is about 2 months after the onset of sea-ice production, and continued to increase during the ice production season. It is most probable that the accumulation of brine in the Cape Darnley polynya produces the seasonal variation of potential temperature-salinity properties of CDBW. Two types of CDBW were identified. Cold and less saline CDBW and warm and saline CDBW were present in Wild and Daly Canyons, respectively. This indicates that the salinity of the source water of CDBW increased in the westward direction. CDBW exhibited short-term variability induced by baroclinic instability. |
format |
Article in Journal/Newspaper |
author |
Genta Mizuta Yasushi Fukamachi Daisuke Simizu Yoshimasa Matsumura Yujiro Kitade Daisuke Hirano Masakazu Fujii Yoshifumi Nogi Kay I. Ohshima |
author_facet |
Genta Mizuta Yasushi Fukamachi Daisuke Simizu Yoshimasa Matsumura Yujiro Kitade Daisuke Hirano Masakazu Fujii Yoshifumi Nogi Kay I. Ohshima |
author_sort |
Genta Mizuta |
title |
Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements |
title_short |
Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements |
title_full |
Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements |
title_fullStr |
Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements |
title_full_unstemmed |
Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements |
title_sort |
seasonal evolution of cape darnley bottom water revealed by mooring measurements |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.657119 https://doaj.org/article/864766caac184037b555e1e1a3813944 |
long_lat |
ENVELOPE(63.761,63.761,-67.513,-67.513) ENVELOPE(69.717,69.717,-67.717,-67.717) ENVELOPE(69.567,69.567,-67.738,-67.738) |
geographic |
Antarctic Daly Darnley Cape Darnley |
geographic_facet |
Antarctic Daly Darnley Cape Darnley |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Frontiers in Marine Science, Vol 8 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2021.657119/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.657119 https://doaj.org/article/864766caac184037b555e1e1a3813944 |
op_doi |
https://doi.org/10.3389/fmars.2021.657119 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1766085040537600000 |