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: | http://dx.doi.org/10.3389/fmars.2021.657119 https://www.frontiersin.org/articles/10.3389/fmars.2021.657119/full |
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crfrontiers:10.3389/fmars.2021.657119 2024-02-11T10:08:32+01:00 Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements Mizuta, Genta Fukamachi, Yasushi Simizu, Daisuke Matsumura, Yoshimasa Kitade, Yujiro Hirano, Daisuke Fujii, Masakazu Nogi, Yoshifumi Ohshima, Kay I. Hokkaido University 2021 http://dx.doi.org/10.3389/fmars.2021.657119 https://www.frontiersin.org/articles/10.3389/fmars.2021.657119/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 8 ISSN 2296-7745 Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography journal-article 2021 crfrontiers https://doi.org/10.3389/fmars.2021.657119 2024-01-26T09:59:54Z 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 Sea ice Frontiers (Publisher) 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 |
Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
topic |
Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography |
spellingShingle |
Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography Mizuta, Genta Fukamachi, Yasushi Simizu, Daisuke Matsumura, Yoshimasa Kitade, Yujiro Hirano, Daisuke Fujii, Masakazu Nogi, Yoshifumi Ohshima, Kay I. Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements |
topic_facet |
Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography |
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. |
author2 |
Hokkaido University |
format |
Article in Journal/Newspaper |
author |
Mizuta, Genta Fukamachi, Yasushi Simizu, Daisuke Matsumura, Yoshimasa Kitade, Yujiro Hirano, Daisuke Fujii, Masakazu Nogi, Yoshifumi Ohshima, Kay I. |
author_facet |
Mizuta, Genta Fukamachi, Yasushi Simizu, Daisuke Matsumura, Yoshimasa Kitade, Yujiro Hirano, Daisuke Fujii, Masakazu Nogi, Yoshifumi Ohshima, Kay I. |
author_sort |
Mizuta, Genta |
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 SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/fmars.2021.657119 https://www.frontiersin.org/articles/10.3389/fmars.2021.657119/full |
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 |
Daly Darnley Cape Darnley |
geographic_facet |
Daly Darnley Cape Darnley |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Frontiers in Marine Science volume 8 ISSN 2296-7745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2021.657119 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1790607919656468480 |