Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica)
We examine the hydrographic variability induced by tides, winds, and the advance of the austral summer, in Maxwell Bay and tributary fjords, based on two recent oceanographic campaigns. We provide the first description in this area of the intrusion of relatively warm subsurface waters, which have le...
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ftpubmed:oai:pubmedcentral.nih.gov:6901452 2023-05-15T13:52:14+02:00 Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica) Llanillo, P. J. Aiken, C. M. Cordero, R. R. Damiani, A. Sepúlveda, E. Fernández-Gómez, B. 2019-12-09 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6901452/ http://www.ncbi.nlm.nih.gov/pubmed/31819101 https://doi.org/10.1038/s41598-019-54875-8 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6901452/ http://www.ncbi.nlm.nih.gov/pubmed/31819101 http://dx.doi.org/10.1038/s41598-019-54875-8 © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2019 ftpubmed https://doi.org/10.1038/s41598-019-54875-8 2019-12-15T01:46:11Z We examine the hydrographic variability induced by tides, winds, and the advance of the austral summer, in Maxwell Bay and tributary fjords, based on two recent oceanographic campaigns. We provide the first description in this area of the intrusion of relatively warm subsurface waters, which have led elsewhere in Antarctica to ice-shelf disintegration and tidewater glacier retreat. During flood tide, meltwater was found to accumulate toward the head of Maxwell Bay, freshening and warming the upper 70 m. Below 70 m, the flood tide enhances the intrusion and mixing of relatively warm modified Upper Circumpolar Deep Water (m-UCDW). Tidal stirring progressively erodes the remnants of Winter Waters found at the bottom of Marian Cove. There is a buoyancy gain through warming and freshening as the summer advances. In Maxwell Bay, the upper 105 m were 0.79 °C warmer and 0.039 PSU fresher in February than in December, changes that cannot be explained by tidal or wind-driven processes. The episodic intrusion of m-UCDW into Maxwell Bay leads to interleaving and eventually to warming, salinification and deoxygenation between 80 and 200 m, with important implications for biological productivity and for the mass balance of tidewater glaciers in the area. Text Antarc* Antarctica Ice Shelf King George Island Maxwell Bay Tidewater West Antarctica PubMed Central (PMC) Austral King George Island Marian ENVELOPE(-58.750,-58.750,-62.217,-62.217) Marian Cove ENVELOPE(-58.800,-58.800,-62.217,-62.217) Maxwell Bay ENVELOPE(-58.859,-58.859,-62.223,-62.223) West Antarctica Scientific Reports 9 1 |
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Article Llanillo, P. J. Aiken, C. M. Cordero, R. R. Damiani, A. Sepúlveda, E. Fernández-Gómez, B. Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica) |
topic_facet |
Article |
description |
We examine the hydrographic variability induced by tides, winds, and the advance of the austral summer, in Maxwell Bay and tributary fjords, based on two recent oceanographic campaigns. We provide the first description in this area of the intrusion of relatively warm subsurface waters, which have led elsewhere in Antarctica to ice-shelf disintegration and tidewater glacier retreat. During flood tide, meltwater was found to accumulate toward the head of Maxwell Bay, freshening and warming the upper 70 m. Below 70 m, the flood tide enhances the intrusion and mixing of relatively warm modified Upper Circumpolar Deep Water (m-UCDW). Tidal stirring progressively erodes the remnants of Winter Waters found at the bottom of Marian Cove. There is a buoyancy gain through warming and freshening as the summer advances. In Maxwell Bay, the upper 105 m were 0.79 °C warmer and 0.039 PSU fresher in February than in December, changes that cannot be explained by tidal or wind-driven processes. The episodic intrusion of m-UCDW into Maxwell Bay leads to interleaving and eventually to warming, salinification and deoxygenation between 80 and 200 m, with important implications for biological productivity and for the mass balance of tidewater glaciers in the area. |
format |
Text |
author |
Llanillo, P. J. Aiken, C. M. Cordero, R. R. Damiani, A. Sepúlveda, E. Fernández-Gómez, B. |
author_facet |
Llanillo, P. J. Aiken, C. M. Cordero, R. R. Damiani, A. Sepúlveda, E. Fernández-Gómez, B. |
author_sort |
Llanillo, P. J. |
title |
Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica) |
title_short |
Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica) |
title_full |
Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica) |
title_fullStr |
Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica) |
title_full_unstemmed |
Oceanographic Variability induced by Tides, the Intraseasonal Cycle and Warm Subsurface Water intrusions in Maxwell Bay, King George Island (West-Antarctica) |
title_sort |
oceanographic variability induced by tides, the intraseasonal cycle and warm subsurface water intrusions in maxwell bay, king george island (west-antarctica) |
publisher |
Nature Publishing Group UK |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6901452/ http://www.ncbi.nlm.nih.gov/pubmed/31819101 https://doi.org/10.1038/s41598-019-54875-8 |
long_lat |
ENVELOPE(-58.750,-58.750,-62.217,-62.217) ENVELOPE(-58.800,-58.800,-62.217,-62.217) ENVELOPE(-58.859,-58.859,-62.223,-62.223) |
geographic |
Austral King George Island Marian Marian Cove Maxwell Bay West Antarctica |
geographic_facet |
Austral King George Island Marian Marian Cove Maxwell Bay West Antarctica |
genre |
Antarc* Antarctica Ice Shelf King George Island Maxwell Bay Tidewater West Antarctica |
genre_facet |
Antarc* Antarctica Ice Shelf King George Island Maxwell Bay Tidewater West Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6901452/ http://www.ncbi.nlm.nih.gov/pubmed/31819101 http://dx.doi.org/10.1038/s41598-019-54875-8 |
op_rights |
© The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-019-54875-8 |
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Scientific Reports |
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