Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula
The Gerlache Strait plays an important role for the transports of heat, nutrients, and primary producers between the northern West Antarctic Peninsula (WAP) and the continental shelf in the southern WAP. The means, seasonal variations, and long-term trends of currents in the Gerlache Strait are anal...
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Online Access: | http://dx.doi.org/10.3389/fmars.2022.877043 https://www.frontiersin.org/articles/10.3389/fmars.2022.877043/full |
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crfrontiers:10.3389/fmars.2022.877043 2024-02-11T09:57:53+01:00 Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula Su, Zhiqiang Zhang, Zhaoru Zhu, Yiwu Zhou, Meng National Natural Science Foundation of China Ministry of Natural Resources of the People’s Republic of China National Science Foundation 2022 http://dx.doi.org/10.3389/fmars.2022.877043 https://www.frontiersin.org/articles/10.3389/fmars.2022.877043/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 9 ISSN 2296-7745 Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography journal-article 2022 crfrontiers https://doi.org/10.3389/fmars.2022.877043 2024-01-26T10:06:59Z The Gerlache Strait plays an important role for the transports of heat, nutrients, and primary producers between the northern West Antarctic Peninsula (WAP) and the continental shelf in the southern WAP. The means, seasonal variations, and long-term trends of currents in the Gerlache Strait are analyzed based on Acoustic Doppler Current Profiler (ADCP) data between 1999 and 2016 available from the Joint Archive for Shipboard ADCP (JASADCP) dataset. The results revealed that the mean currents between the sea surface and 300 m in the Gerlache Strait (known as the Gerlache Strait Current) were predominantly northeastward, associated with the northeastward intrusion of Modified Circumpolar Deep Water (MCDW). The variance ellipses of currents were in parallel to the principal axis of the strait. The currents reached the maximum during austral spring and summer and were minimum during austral winter. The long-term trends revealed that the mean currents were southwestward during austral fall or winter before 2005, and the northeastward currents increased between 1999 and 2011, weakened, and reversed between 2011 and 2016. The long-term shifts between warm and cold phases in the Gerlache Strait were associated with shifts between the dominance of northeastward and southwestward currents in the strait, which are respectively associated with the intrusion of warm MCDW in the south and the transport of cold water from the Bransfield Strait in the north. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Frontiers (Publisher) Antarctic Antarctic Peninsula Austral Bransfield Strait Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) Frontiers in Marine Science 9 |
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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 Su, Zhiqiang Zhang, Zhaoru Zhu, Yiwu Zhou, Meng Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula |
topic_facet |
Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography |
description |
The Gerlache Strait plays an important role for the transports of heat, nutrients, and primary producers between the northern West Antarctic Peninsula (WAP) and the continental shelf in the southern WAP. The means, seasonal variations, and long-term trends of currents in the Gerlache Strait are analyzed based on Acoustic Doppler Current Profiler (ADCP) data between 1999 and 2016 available from the Joint Archive for Shipboard ADCP (JASADCP) dataset. The results revealed that the mean currents between the sea surface and 300 m in the Gerlache Strait (known as the Gerlache Strait Current) were predominantly northeastward, associated with the northeastward intrusion of Modified Circumpolar Deep Water (MCDW). The variance ellipses of currents were in parallel to the principal axis of the strait. The currents reached the maximum during austral spring and summer and were minimum during austral winter. The long-term trends revealed that the mean currents were southwestward during austral fall or winter before 2005, and the northeastward currents increased between 1999 and 2011, weakened, and reversed between 2011 and 2016. The long-term shifts between warm and cold phases in the Gerlache Strait were associated with shifts between the dominance of northeastward and southwestward currents in the strait, which are respectively associated with the intrusion of warm MCDW in the south and the transport of cold water from the Bransfield Strait in the north. |
author2 |
National Natural Science Foundation of China Ministry of Natural Resources of the People’s Republic of China National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Su, Zhiqiang Zhang, Zhaoru Zhu, Yiwu Zhou, Meng |
author_facet |
Su, Zhiqiang Zhang, Zhaoru Zhu, Yiwu Zhou, Meng |
author_sort |
Su, Zhiqiang |
title |
Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula |
title_short |
Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula |
title_full |
Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula |
title_fullStr |
Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula |
title_full_unstemmed |
Long-Term Warm–Cold Phase Shifts in the Gerlache Strait, Western Antarctic Peninsula |
title_sort |
long-term warm–cold phase shifts in the gerlache strait, western antarctic peninsula |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fmars.2022.877043 https://www.frontiersin.org/articles/10.3389/fmars.2022.877043/full |
long_lat |
ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) |
geographic |
Antarctic Antarctic Peninsula Austral Bransfield Strait Gerlache Gerlache Strait |
geographic_facet |
Antarctic Antarctic Peninsula Austral Bransfield Strait Gerlache Gerlache Strait |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait |
op_source |
Frontiers in Marine Science volume 9 ISSN 2296-7745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2022.877043 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1790593431263772672 |