Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia
Sub-Antarctic South Georgia is a key region for studying climate variability in the Southern Hemisphere, because of its position at the core of the Southern Hemisphere Westerly Wind belt and between the Antarctic Circumpolar Current and the Polar Frontal Zone. Here, we present a 5.8-m long high-reso...
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ftunivgent:oai:archive.ugent.be:5904628 2023-06-11T04:03:55+02:00 Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia Strother, Stephanie L Salzmann, Ulrich Roberts, Stephen J Hodgson, Dominic A Woodward, John Van Nieuwenhuyze, Wim Verleyen, Elie Vyverman, Wim Moreton, Steven G 2015 application/pdf https://biblio.ugent.be/publication/5904628 http://hdl.handle.net/1854/LU-5904628 https://doi.org/10.1177/0959683614557576 https://biblio.ugent.be/publication/5904628/file/5904705 eng eng https://biblio.ugent.be/publication/5904628 http://hdl.handle.net/1854/LU-5904628 http://dx.doi.org/10.1177/0959683614557576 https://biblio.ugent.be/publication/5904628/file/5904705 No license (in copyright) info:eu-repo/semantics/restrictedAccess HOLOCENE ISSN: 0959-6836 Earth and Environmental Sciences palynology Holocene South Georgia Southern Hemisphere Westerly Winds sub-Antarctica vegetation TIERRA-DEL-FUEGO ATMOSPHERIC CO2 ENVIRONMENTAL-CHANGES ORGANIC-MATTER LAKE-SEDIMENTS SW PATAGONIA LOS ESTADOS ISLAND OCEAN VARIABILITY journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftunivgent https://doi.org/10.1177/0959683614557576 2023-05-10T22:28:40Z Sub-Antarctic South Georgia is a key region for studying climate variability in the Southern Hemisphere, because of its position at the core of the Southern Hemisphere Westerly Wind belt and between the Antarctic Circumpolar Current and the Polar Frontal Zone. Here, we present a 5.8-m long high-resolution pollen record from Fan Lake on Annenkov Island dominated by local sub-polar vegetation, with Acaena and Poaceae being present throughout the last 7000years. Palynological and sedimentological analyses revealed a warm late Holocene climate optimum' between 3790 and 2750 cal. yr BP, which was followed by a gradual transition to cool and wet conditions. This cooling was interrupted by slightly warmer environmental conditions between 1670 and 710 cal. yr BP that partly overlap with the Northern Hemisphere Medieval Climate Anomaly'. Increases in non-native and long-distance pollen grains transported from South America (e.g. Nothofagus, Podocarpus) indicate that stronger Southern Hemisphere Westerly Winds over South Georgia possibly occurred during some colder' phases of the late Holocene, most notably between c. 2210 and 1670 cal. yr BP and after 710 cal. yr BP. Article in Journal/Newspaper Annenkov Island Antarc* Antarctic Antarctica Tierra del Fuego Ghent University Academic Bibliography Antarctic The Antarctic Patagonia Annenkov Island ENVELOPE(-37.079,-37.079,-54.490,-54.490) Fan Lake ENVELOPE(-37.050,-37.050,-54.500,-54.500) The Holocene 25 2 263 279 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences palynology Holocene South Georgia Southern Hemisphere Westerly Winds sub-Antarctica vegetation TIERRA-DEL-FUEGO ATMOSPHERIC CO2 ENVIRONMENTAL-CHANGES ORGANIC-MATTER LAKE-SEDIMENTS SW PATAGONIA LOS ESTADOS ISLAND OCEAN VARIABILITY |
spellingShingle |
Earth and Environmental Sciences palynology Holocene South Georgia Southern Hemisphere Westerly Winds sub-Antarctica vegetation TIERRA-DEL-FUEGO ATMOSPHERIC CO2 ENVIRONMENTAL-CHANGES ORGANIC-MATTER LAKE-SEDIMENTS SW PATAGONIA LOS ESTADOS ISLAND OCEAN VARIABILITY Strother, Stephanie L Salzmann, Ulrich Roberts, Stephen J Hodgson, Dominic A Woodward, John Van Nieuwenhuyze, Wim Verleyen, Elie Vyverman, Wim Moreton, Steven G Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia |
topic_facet |
Earth and Environmental Sciences palynology Holocene South Georgia Southern Hemisphere Westerly Winds sub-Antarctica vegetation TIERRA-DEL-FUEGO ATMOSPHERIC CO2 ENVIRONMENTAL-CHANGES ORGANIC-MATTER LAKE-SEDIMENTS SW PATAGONIA LOS ESTADOS ISLAND OCEAN VARIABILITY |
description |
Sub-Antarctic South Georgia is a key region for studying climate variability in the Southern Hemisphere, because of its position at the core of the Southern Hemisphere Westerly Wind belt and between the Antarctic Circumpolar Current and the Polar Frontal Zone. Here, we present a 5.8-m long high-resolution pollen record from Fan Lake on Annenkov Island dominated by local sub-polar vegetation, with Acaena and Poaceae being present throughout the last 7000years. Palynological and sedimentological analyses revealed a warm late Holocene climate optimum' between 3790 and 2750 cal. yr BP, which was followed by a gradual transition to cool and wet conditions. This cooling was interrupted by slightly warmer environmental conditions between 1670 and 710 cal. yr BP that partly overlap with the Northern Hemisphere Medieval Climate Anomaly'. Increases in non-native and long-distance pollen grains transported from South America (e.g. Nothofagus, Podocarpus) indicate that stronger Southern Hemisphere Westerly Winds over South Georgia possibly occurred during some colder' phases of the late Holocene, most notably between c. 2210 and 1670 cal. yr BP and after 710 cal. yr BP. |
format |
Article in Journal/Newspaper |
author |
Strother, Stephanie L Salzmann, Ulrich Roberts, Stephen J Hodgson, Dominic A Woodward, John Van Nieuwenhuyze, Wim Verleyen, Elie Vyverman, Wim Moreton, Steven G |
author_facet |
Strother, Stephanie L Salzmann, Ulrich Roberts, Stephen J Hodgson, Dominic A Woodward, John Van Nieuwenhuyze, Wim Verleyen, Elie Vyverman, Wim Moreton, Steven G |
author_sort |
Strother, Stephanie L |
title |
Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia |
title_short |
Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia |
title_full |
Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia |
title_fullStr |
Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia |
title_full_unstemmed |
Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia |
title_sort |
changes in holocene climate and the intensity of southern hemisphere westerly winds based on a high-resolution palynological record from sub-antarctic south georgia |
publishDate |
2015 |
url |
https://biblio.ugent.be/publication/5904628 http://hdl.handle.net/1854/LU-5904628 https://doi.org/10.1177/0959683614557576 https://biblio.ugent.be/publication/5904628/file/5904705 |
long_lat |
ENVELOPE(-37.079,-37.079,-54.490,-54.490) ENVELOPE(-37.050,-37.050,-54.500,-54.500) |
geographic |
Antarctic The Antarctic Patagonia Annenkov Island Fan Lake |
geographic_facet |
Antarctic The Antarctic Patagonia Annenkov Island Fan Lake |
genre |
Annenkov Island Antarc* Antarctic Antarctica Tierra del Fuego |
genre_facet |
Annenkov Island Antarc* Antarctic Antarctica Tierra del Fuego |
op_source |
HOLOCENE ISSN: 0959-6836 |
op_relation |
https://biblio.ugent.be/publication/5904628 http://hdl.handle.net/1854/LU-5904628 http://dx.doi.org/10.1177/0959683614557576 https://biblio.ugent.be/publication/5904628/file/5904705 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1177/0959683614557576 |
container_title |
The Holocene |
container_volume |
25 |
container_issue |
2 |
container_start_page |
263 |
op_container_end_page |
279 |
_version_ |
1768384464729145344 |