Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010)
Winds in the Southern Ocean drive exchanges of heat and carbon dioxide between the ocean and atmosphere. Wind dynamics also explain the dominant patterns of both basal and surface melting of glaciers and ice shelves in the Amundsen and Bellingshausen Seas. Long records of past wind strength and atmo...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/527092/ https://nora.nerc.ac.uk/id/eprint/527092/1/geosciences-10-00087.pdf https://www.mdpi.com/2076-3263/10/3/87 |
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ftnerc:oai:nora.nerc.ac.uk:527092 2023-05-15T13:41:45+02:00 Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010) Allen, Claire Thomas, Elizabeth R. Blagbrough, Hilary Tetzner, Dieter Warren, Richard A. Ludlow, Emily C. Bracegirdle, Thomas J. 2020-02-26 text http://nora.nerc.ac.uk/id/eprint/527092/ https://nora.nerc.ac.uk/id/eprint/527092/1/geosciences-10-00087.pdf https://www.mdpi.com/2076-3263/10/3/87 en eng MDPI https://nora.nerc.ac.uk/id/eprint/527092/1/geosciences-10-00087.pdf Allen, Claire orcid:0000-0002-0938-0551 Thomas, Elizabeth R. orcid:0000-0002-3010-6493 Blagbrough, Hilary orcid:0000-0001-6904-777X Tetzner, Dieter orcid:0000-0001-7659-8799 Warren, Richard A.; Ludlow, Emily C.; Bracegirdle, Thomas J. orcid:0000-0002-8868-4739 . 2020 Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010). Geosciences, 10 (3), 87. https://doi.org/10.3390/geosciences10030087 <https://doi.org/10.3390/geosciences10030087> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.3390/geosciences10030087 2023-02-04T19:50:20Z Winds in the Southern Ocean drive exchanges of heat and carbon dioxide between the ocean and atmosphere. Wind dynamics also explain the dominant patterns of both basal and surface melting of glaciers and ice shelves in the Amundsen and Bellingshausen Seas. Long records of past wind strength and atmospheric circulation are needed to assess the significance of these recent changes. Here we present evidence for a novel proxy of past south westerly wind (SWW) strength over the Amundsen and Bellingshausen Seas, based on diatoms preserved in an Antarctic Peninsula ice core. Ecological affinities of the identified diatom taxa indicate an almost exclusively marine assemblage, dominated by open ocean taxa from the Northern Antarctic Zone (NAZ). Backtrajectory analysis shows the routes of air masses reaching the ice core site and reveals that many trajectories involve contact with surface waters in the NAZ of the Amundsen and Bellingshausen Seas. Correlation analyses between ice core diatom abundance and various wind vectors yield positive and robust coefficients for the 1980–2010 period, with average annual SWW speeds exhibiting the strongest match. Collectively, the data presented here provide new evidence that diatoms preserved in an Antarctic Peninsula ice core offer genuine potential as a new proxy for SWW strength. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula ice core Ice Shelves Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean Antarctic Peninsula Geosciences 10 3 87 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Winds in the Southern Ocean drive exchanges of heat and carbon dioxide between the ocean and atmosphere. Wind dynamics also explain the dominant patterns of both basal and surface melting of glaciers and ice shelves in the Amundsen and Bellingshausen Seas. Long records of past wind strength and atmospheric circulation are needed to assess the significance of these recent changes. Here we present evidence for a novel proxy of past south westerly wind (SWW) strength over the Amundsen and Bellingshausen Seas, based on diatoms preserved in an Antarctic Peninsula ice core. Ecological affinities of the identified diatom taxa indicate an almost exclusively marine assemblage, dominated by open ocean taxa from the Northern Antarctic Zone (NAZ). Backtrajectory analysis shows the routes of air masses reaching the ice core site and reveals that many trajectories involve contact with surface waters in the NAZ of the Amundsen and Bellingshausen Seas. Correlation analyses between ice core diatom abundance and various wind vectors yield positive and robust coefficients for the 1980–2010 period, with average annual SWW speeds exhibiting the strongest match. Collectively, the data presented here provide new evidence that diatoms preserved in an Antarctic Peninsula ice core offer genuine potential as a new proxy for SWW strength. |
format |
Article in Journal/Newspaper |
author |
Allen, Claire Thomas, Elizabeth R. Blagbrough, Hilary Tetzner, Dieter Warren, Richard A. Ludlow, Emily C. Bracegirdle, Thomas J. |
spellingShingle |
Allen, Claire Thomas, Elizabeth R. Blagbrough, Hilary Tetzner, Dieter Warren, Richard A. Ludlow, Emily C. Bracegirdle, Thomas J. Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010) |
author_facet |
Allen, Claire Thomas, Elizabeth R. Blagbrough, Hilary Tetzner, Dieter Warren, Richard A. Ludlow, Emily C. Bracegirdle, Thomas J. |
author_sort |
Allen, Claire |
title |
Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010) |
title_short |
Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010) |
title_full |
Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010) |
title_fullStr |
Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010) |
title_full_unstemmed |
Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010) |
title_sort |
preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an antarctic peninsula ice core (1980–2010) |
publisher |
MDPI |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/527092/ https://nora.nerc.ac.uk/id/eprint/527092/1/geosciences-10-00087.pdf https://www.mdpi.com/2076-3263/10/3/87 |
geographic |
Antarctic Southern Ocean Antarctic Peninsula |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula ice core Ice Shelves Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula ice core Ice Shelves Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/527092/1/geosciences-10-00087.pdf Allen, Claire orcid:0000-0002-0938-0551 Thomas, Elizabeth R. orcid:0000-0002-3010-6493 Blagbrough, Hilary orcid:0000-0001-6904-777X Tetzner, Dieter orcid:0000-0001-7659-8799 Warren, Richard A.; Ludlow, Emily C.; Bracegirdle, Thomas J. orcid:0000-0002-8868-4739 . 2020 Preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an Antarctic Peninsula ice core (1980–2010). Geosciences, 10 (3), 87. https://doi.org/10.3390/geosciences10030087 <https://doi.org/10.3390/geosciences10030087> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/geosciences10030087 |
container_title |
Geosciences |
container_volume |
10 |
container_issue |
3 |
container_start_page |
87 |
_version_ |
1766156741565743104 |