Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry
Year‐round variability in the Ross Gyre (RG), Antarctica, during 2011‐2015, is derived using radar altimetry. The RG is characterized by a bounded recirculating component, and a westward ‘throughflow’ to the south. Two modes of variability of the sea‐surface height (SSH) and ocean surface stress cur...
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ftnerc:oai:nora.nerc.ac.uk:520353 2023-05-15T13:24:00+02:00 Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry Dotto, Tiago S. Naveira Garabato, Alberto Bacon, Sheldon Tsamados, Michel Holland, Paul R. Hooley, Jack Frajka-Williams, Eleanor Ridout, Andy Meredith, Michael P. 2018-06 text http://nora.nerc.ac.uk/id/eprint/520353/ https://nora.nerc.ac.uk/id/eprint/520353/1/Dotto_et_al-2018-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL078607 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/520353/1/Dotto_et_al-2018-Geophysical_Research_Letters.pdf Dotto, Tiago S.; Naveira Garabato, Alberto; Bacon, Sheldon orcid:0000-0002-2471-9373 Tsamados, Michel; Holland, Paul R. orcid:0000-0001-8370-289X Hooley, Jack; Frajka-Williams, Eleanor orcid:0000-0001-8773-7838 Ridout, Andy; Meredith, Michael P. orcid:0000-0002-7342-7756 . 2018 Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry. Geophysical Research Letters, 45 (12). 6195-6204. https://doi.org/10.1029/2018GL078607 <https://doi.org/10.1029/2018GL078607> cc_by_4 CC-BY Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1029/2018GL078607 2023-02-04T19:46:43Z Year‐round variability in the Ross Gyre (RG), Antarctica, during 2011‐2015, is derived using radar altimetry. The RG is characterized by a bounded recirculating component, and a westward ‘throughflow’ to the south. Two modes of variability of the sea‐surface height (SSH) and ocean surface stress curl are revealed. The first represents a large‐scale SSH change forced by the Antarctic Oscillation. The second represents semiannual variability in gyre area and strength, driven by fluctuations in sea level pressure associated with the Amundsen Sea Low (ASL). Variability in the throughflow is also linked to the ASL. An adequate description of the oceanic circulation is achieved only when sea ice drag is accounted for in the ocean surface stress. The drivers of RG variability elucidated here have significant implications for our understanding of the oceanic forcing of Antarctic Ice Sheet melting, and for the downstream propagation of its ocean freshening footprint. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Amundsen Sea Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) Geophysical Research Letters |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Year‐round variability in the Ross Gyre (RG), Antarctica, during 2011‐2015, is derived using radar altimetry. The RG is characterized by a bounded recirculating component, and a westward ‘throughflow’ to the south. Two modes of variability of the sea‐surface height (SSH) and ocean surface stress curl are revealed. The first represents a large‐scale SSH change forced by the Antarctic Oscillation. The second represents semiannual variability in gyre area and strength, driven by fluctuations in sea level pressure associated with the Amundsen Sea Low (ASL). Variability in the throughflow is also linked to the ASL. An adequate description of the oceanic circulation is achieved only when sea ice drag is accounted for in the ocean surface stress. The drivers of RG variability elucidated here have significant implications for our understanding of the oceanic forcing of Antarctic Ice Sheet melting, and for the downstream propagation of its ocean freshening footprint. |
format |
Article in Journal/Newspaper |
author |
Dotto, Tiago S. Naveira Garabato, Alberto Bacon, Sheldon Tsamados, Michel Holland, Paul R. Hooley, Jack Frajka-Williams, Eleanor Ridout, Andy Meredith, Michael P. |
spellingShingle |
Dotto, Tiago S. Naveira Garabato, Alberto Bacon, Sheldon Tsamados, Michel Holland, Paul R. Hooley, Jack Frajka-Williams, Eleanor Ridout, Andy Meredith, Michael P. Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry |
author_facet |
Dotto, Tiago S. Naveira Garabato, Alberto Bacon, Sheldon Tsamados, Michel Holland, Paul R. Hooley, Jack Frajka-Williams, Eleanor Ridout, Andy Meredith, Michael P. |
author_sort |
Dotto, Tiago S. |
title |
Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry |
title_short |
Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry |
title_full |
Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry |
title_fullStr |
Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry |
title_full_unstemmed |
Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry |
title_sort |
variability of the ross gyre, southern ocean: drivers and responses revealed by satellite altimetry |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/520353/ https://nora.nerc.ac.uk/id/eprint/520353/1/Dotto_et_al-2018-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL078607 |
long_lat |
ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
geographic |
Antarctic Southern Ocean The Antarctic Amundsen Sea Curl |
geographic_facet |
Antarctic Southern Ocean The Antarctic Amundsen Sea Curl |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520353/1/Dotto_et_al-2018-Geophysical_Research_Letters.pdf Dotto, Tiago S.; Naveira Garabato, Alberto; Bacon, Sheldon orcid:0000-0002-2471-9373 Tsamados, Michel; Holland, Paul R. orcid:0000-0001-8370-289X Hooley, Jack; Frajka-Williams, Eleanor orcid:0000-0001-8773-7838 Ridout, Andy; Meredith, Michael P. orcid:0000-0002-7342-7756 . 2018 Variability of the Ross Gyre, Southern Ocean: drivers and responses revealed by satellite altimetry. Geophysical Research Letters, 45 (12). 6195-6204. https://doi.org/10.1029/2018GL078607 <https://doi.org/10.1029/2018GL078607> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2018GL078607 |
container_title |
Geophysical Research Letters |
_version_ |
1766376894725357568 |