Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water
Conductivity-temperature-depth data from instrumented seals of the Marine Mammals Exploring Oceans from Pole to Pole program are analyzed to characterize the water masses and the seasonality of the marginal seas. Bottom temperatures are found to be in a cold regime in Dense Shelf Water (DSW) produci...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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2019
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Online Access: | https://eprints.soton.ac.uk/489937/ |
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ftsouthampton:oai:eprints.soton.ac.uk:489937 2024-06-23T07:45:28+00:00 Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water Narayanan, Aditya Gille, Sarah T. Mazloff, Matthew R. Murali, K. 2019-12-17 https://eprints.soton.ac.uk/489937/ English eng Narayanan, Aditya, Gille, Sarah T., Mazloff, Matthew R. and Murali, K. (2019) Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water. Journal of Geophysical Research: Oceans, 124 (12), 9277-9294. (doi:10.1029/2018jc014907 <http://dx.doi.org/10.1029/2018jc014907>). Article PeerReviewed 2019 ftsouthampton https://doi.org/10.1029/2018jc014907 2024-05-29T00:34:52Z Conductivity-temperature-depth data from instrumented seals of the Marine Mammals Exploring Oceans from Pole to Pole program are analyzed to characterize the water masses and the seasonality of the marginal seas. Bottom temperatures are found to be in a cold regime in Dense Shelf Water (DSW) producing regions, identified in this study as the southern Weddell Sea, Cape Darnley, Prydz Bay, Adélie Coast, and the western Ross Sea. DSW occupies the bottom of the Weddell and Ross Sea continental shelves throughout the year: Production of DSW and vertical overturning occur only during the winter. In the other DSW producing regions, salinity is reduced more markedly during the summer. We identify the Princess Martha Coast, Leopold and Astrid Coast, and the Knox Coast as Low Salinity Shelf Water producing regions, where modified Circumpolar Deep Water (CDW) intrudes onto the continental shelf, reaching areas close to the ice shelves keeping the bottom temperatures in an intermediate regime. The Prince Harald Coast, the Amundsen Sea, and the Bellingshausen Sea experience more intense CDW intrusion, which keeps them in a warm regime year-round. CDW layer thicknesses correlate with the meridional winds over the shelf sea, and with the zonal winds at the slope, while DSW layer thicknesses correlate with the meridional winds over the shelf seas and the curl of the wind stress over the slope. Locations of DSW on the continental shelf coincide with an absence of warmer CDW near the ice shelves. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Astrid Coast Bellingshausen Sea Ice Shelves Leopold and Astrid Coast Prince Harald Coast Princess Martha Coast Prydz Bay Ross Sea Weddell Sea University of Southampton: e-Prints Soton Antarctic The Antarctic Weddell Sea Ross Sea Amundsen Sea Prydz Bay Bellingshausen Sea Weddell Leopold ENVELOPE(85.000,85.000,-72.000,-72.000) Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) Adélie Coast ENVELOPE(139.000,139.000,-60.000,-60.000) Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) Princess Martha Coast ENVELOPE(-7.500,-7.500,-72.000,-72.000) Knox Coast ENVELOPE(105.000,105.000,-66.500,-66.500) Prince Harald Coast ENVELOPE(36.000,36.000,-69.500,-69.500) Journal of Geophysical Research: Oceans 124 12 9277 9294 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
Conductivity-temperature-depth data from instrumented seals of the Marine Mammals Exploring Oceans from Pole to Pole program are analyzed to characterize the water masses and the seasonality of the marginal seas. Bottom temperatures are found to be in a cold regime in Dense Shelf Water (DSW) producing regions, identified in this study as the southern Weddell Sea, Cape Darnley, Prydz Bay, Adélie Coast, and the western Ross Sea. DSW occupies the bottom of the Weddell and Ross Sea continental shelves throughout the year: Production of DSW and vertical overturning occur only during the winter. In the other DSW producing regions, salinity is reduced more markedly during the summer. We identify the Princess Martha Coast, Leopold and Astrid Coast, and the Knox Coast as Low Salinity Shelf Water producing regions, where modified Circumpolar Deep Water (CDW) intrudes onto the continental shelf, reaching areas close to the ice shelves keeping the bottom temperatures in an intermediate regime. The Prince Harald Coast, the Amundsen Sea, and the Bellingshausen Sea experience more intense CDW intrusion, which keeps them in a warm regime year-round. CDW layer thicknesses correlate with the meridional winds over the shelf sea, and with the zonal winds at the slope, while DSW layer thicknesses correlate with the meridional winds over the shelf seas and the curl of the wind stress over the slope. Locations of DSW on the continental shelf coincide with an absence of warmer CDW near the ice shelves. |
format |
Article in Journal/Newspaper |
author |
Narayanan, Aditya Gille, Sarah T. Mazloff, Matthew R. Murali, K. |
spellingShingle |
Narayanan, Aditya Gille, Sarah T. Mazloff, Matthew R. Murali, K. Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water |
author_facet |
Narayanan, Aditya Gille, Sarah T. Mazloff, Matthew R. Murali, K. |
author_sort |
Narayanan, Aditya |
title |
Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water |
title_short |
Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water |
title_full |
Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water |
title_fullStr |
Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water |
title_full_unstemmed |
Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water |
title_sort |
water mass characteristics of the antarctic margins and the production and seasonality of dense shelf water |
publishDate |
2019 |
url |
https://eprints.soton.ac.uk/489937/ |
long_lat |
ENVELOPE(85.000,85.000,-72.000,-72.000) ENVELOPE(-63.071,-63.071,-70.797,-70.797) ENVELOPE(69.717,69.717,-67.717,-67.717) ENVELOPE(139.000,139.000,-60.000,-60.000) ENVELOPE(69.567,69.567,-67.738,-67.738) ENVELOPE(-7.500,-7.500,-72.000,-72.000) ENVELOPE(105.000,105.000,-66.500,-66.500) ENVELOPE(36.000,36.000,-69.500,-69.500) |
geographic |
Antarctic The Antarctic Weddell Sea Ross Sea Amundsen Sea Prydz Bay Bellingshausen Sea Weddell Leopold Curl Darnley Adélie Coast Cape Darnley Princess Martha Coast Knox Coast Prince Harald Coast |
geographic_facet |
Antarctic The Antarctic Weddell Sea Ross Sea Amundsen Sea Prydz Bay Bellingshausen Sea Weddell Leopold Curl Darnley Adélie Coast Cape Darnley Princess Martha Coast Knox Coast Prince Harald Coast |
genre |
Amundsen Sea Antarc* Antarctic Astrid Coast Bellingshausen Sea Ice Shelves Leopold and Astrid Coast Prince Harald Coast Princess Martha Coast Prydz Bay Ross Sea Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Astrid Coast Bellingshausen Sea Ice Shelves Leopold and Astrid Coast Prince Harald Coast Princess Martha Coast Prydz Bay Ross Sea Weddell Sea |
op_relation |
Narayanan, Aditya, Gille, Sarah T., Mazloff, Matthew R. and Murali, K. (2019) Water mass characteristics of the Antarctic margins and the production and seasonality of dense shelf water. Journal of Geophysical Research: Oceans, 124 (12), 9277-9294. (doi:10.1029/2018jc014907 <http://dx.doi.org/10.1029/2018jc014907>). |
op_doi |
https://doi.org/10.1029/2018jc014907 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
124 |
container_issue |
12 |
container_start_page |
9277 |
op_container_end_page |
9294 |
_version_ |
1802639863268245504 |