Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica
Terra Nova Bay in Antarctica is a formation region for high-salinity shelf water (HSSW), which is a major source of Antarctic Bottom Water. Here, we analyze spatiotemporal salinity variability in Terra Nova Bay with implications for the local HSSW production. The salinity variations in the Drygalski...
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Copernicus Publications
2020
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00050971 2023-05-15T13:54:46+02:00 Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica Yoon, Seung-Tae Lee, Won Sang Stevens, Craig Jendersie, Stefan Nam, SungHyun Yun, Sukyoung Hwang, Chung Yeon Jang, Gwang Il Lee, Jiyeon 2020-03 electronic https://doi.org/10.5194/os-16-373-2020 https://noa.gwlb.de/receive/cop_mods_00050971 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050628/os-16-373-2020.pdf https://os.copernicus.org/articles/16/373/2020/os-16-373-2020.pdf eng eng Copernicus Publications Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-16-373-2020 https://noa.gwlb.de/receive/cop_mods_00050971 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050628/os-16-373-2020.pdf https://os.copernicus.org/articles/16/373/2020/os-16-373-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/os-16-373-2020 2022-02-08T22:36:37Z Terra Nova Bay in Antarctica is a formation region for high-salinity shelf water (HSSW), which is a major source of Antarctic Bottom Water. Here, we analyze spatiotemporal salinity variability in Terra Nova Bay with implications for the local HSSW production. The salinity variations in the Drygalski Basin and eastern Terra Nova Bay near Crary Bank in the Ross Sea were investigated by analyzing hydrographic data from instrumented moorings, vessel-based profiles, and available wind and sea-ice products. Near-bed salinity in the eastern Terra Nova Bay (∼660 m) and Drygalski Basin (∼1200 m) increases each year beginning in September. Significant salinity increases (>0.04) were observed in 2016 and 2017, which is likely related to active HSSW formation. According to velocity data at identical depths, the salinity increase from September was primarily due to advection of the HSSW originating from the coastal region of the Nansen Ice Shelf. In addition, we show that HSSW can also be formed locally in the upper water column (<300 m) of the eastern Terra Nova Bay through convection supplied by brine from the surface, which is related to polynya development via winds and ice freezing. While the general consensus is that the salinity of the HSSW was decreasing from 1995 to the late 2000s in the region, the salinity has been increasing since 2016. In 2018, it returned to values comparable to those in the early 2000s. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ross Sea Sea ice Niedersächsisches Online-Archiv NOA Antarctic Ross Sea Terra Nova Bay Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Basin ENVELOPE(166.500,166.500,-74.833,-74.833) Crary Bank ENVELOPE(169.000,169.000,-75.000,-75.000) Ocean Science 16 2 373 388 |
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Niedersächsisches Online-Archiv NOA |
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article Verlagsveröffentlichung Yoon, Seung-Tae Lee, Won Sang Stevens, Craig Jendersie, Stefan Nam, SungHyun Yun, Sukyoung Hwang, Chung Yeon Jang, Gwang Il Lee, Jiyeon Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
Terra Nova Bay in Antarctica is a formation region for high-salinity shelf water (HSSW), which is a major source of Antarctic Bottom Water. Here, we analyze spatiotemporal salinity variability in Terra Nova Bay with implications for the local HSSW production. The salinity variations in the Drygalski Basin and eastern Terra Nova Bay near Crary Bank in the Ross Sea were investigated by analyzing hydrographic data from instrumented moorings, vessel-based profiles, and available wind and sea-ice products. Near-bed salinity in the eastern Terra Nova Bay (∼660 m) and Drygalski Basin (∼1200 m) increases each year beginning in September. Significant salinity increases (>0.04) were observed in 2016 and 2017, which is likely related to active HSSW formation. According to velocity data at identical depths, the salinity increase from September was primarily due to advection of the HSSW originating from the coastal region of the Nansen Ice Shelf. In addition, we show that HSSW can also be formed locally in the upper water column (<300 m) of the eastern Terra Nova Bay through convection supplied by brine from the surface, which is related to polynya development via winds and ice freezing. While the general consensus is that the salinity of the HSSW was decreasing from 1995 to the late 2000s in the region, the salinity has been increasing since 2016. In 2018, it returned to values comparable to those in the early 2000s. |
format |
Article in Journal/Newspaper |
author |
Yoon, Seung-Tae Lee, Won Sang Stevens, Craig Jendersie, Stefan Nam, SungHyun Yun, Sukyoung Hwang, Chung Yeon Jang, Gwang Il Lee, Jiyeon |
author_facet |
Yoon, Seung-Tae Lee, Won Sang Stevens, Craig Jendersie, Stefan Nam, SungHyun Yun, Sukyoung Hwang, Chung Yeon Jang, Gwang Il Lee, Jiyeon |
author_sort |
Yoon, Seung-Tae |
title |
Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica |
title_short |
Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica |
title_full |
Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica |
title_fullStr |
Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica |
title_full_unstemmed |
Variability in high-salinity shelf water production in the Terra Nova Bay polynya, Antarctica |
title_sort |
variability in high-salinity shelf water production in the terra nova bay polynya, antarctica |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/os-16-373-2020 https://noa.gwlb.de/receive/cop_mods_00050971 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050628/os-16-373-2020.pdf https://os.copernicus.org/articles/16/373/2020/os-16-373-2020.pdf |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(166.500,166.500,-74.833,-74.833) ENVELOPE(169.000,169.000,-75.000,-75.000) |
geographic |
Antarctic Ross Sea Terra Nova Bay Drygalski Drygalski Basin Crary Bank |
geographic_facet |
Antarctic Ross Sea Terra Nova Bay Drygalski Drygalski Basin Crary Bank |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ross Sea Sea ice |
op_relation |
Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-16-373-2020 https://noa.gwlb.de/receive/cop_mods_00050971 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050628/os-16-373-2020.pdf https://os.copernicus.org/articles/16/373/2020/os-16-373-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/os-16-373-2020 |
container_title |
Ocean Science |
container_volume |
16 |
container_issue |
2 |
container_start_page |
373 |
op_container_end_page |
388 |
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1766260884347289600 |