Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation
The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and termination on sub-Antarctic South Georgia in particular. Here, using sea-floor geophysical data and marine sediment cores, we resolve the record of...
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-2541 2023-07-30T03:58:37+02:00 Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation Graham, Alastair G. C. Kuhn, Gerhard Meisel, Ove Hillenbrand, Claus-Dieter Hodgson, Dominic A. Ehrmann, Werner Wacker, Lukas Wintersteller, Paul dos Santos Ferreira, Santos Ferreira, Römer, Miriam White, Duanne Bohrmann, Gerhard 2017-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/1579 https://doi.org/10.1038/ncomms14798 https://digitalcommons.usf.edu/context/msc_facpub/article/2541/viewcontent/ncomms14798.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1579 doi:10.1038/ncomms14798 https://digitalcommons.usf.edu/context/msc_facpub/article/2541/viewcontent/ncomms14798.pdf http://creativecommons.org/licenses/by/4.0/ Marine Science Faculty Publications Cryospheric science Palaeoclimate Life Sciences article 2017 ftusouthflorida https://doi.org/10.1038/ncomms14798 2023-07-13T21:02:06Z The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and termination on sub-Antarctic South Georgia in particular. Here, using sea-floor geophysical data and marine sediment cores, we resolve the record of glaciation offshore of South Georgia through the transition from the Last Glacial Maximum to Holocene. We show a sea-bed landform imprint of a shelf-wide last glacial advance and progressive deglaciation. Renewed glacier resurgence in the fjords between c. 15,170 and 13,340 yr ago coincided with a period of cooler, wetter climate known as the Antarctic Cold Reversal, revealing a cryospheric response to an Antarctic climate pattern extending into the Atlantic sector of the Southern Ocean. We conclude that the last glaciation of South Georgia was extensive, and the sensitivity of its glaciers to climate variability during the last termination more significant than implied by previous studies. The glaciated history of South Georgia is debated, with many suggesting a coastal limit to the island’s ice cap during the last glaciation. Here, the authors show extensive ice-cap cover of the continental block during this time and a readvance of glaciers to fjord mouths during the Antarctic Cold Reversal. Article in Journal/Newspaper Antarc* Antarctic Ice cap Southern Ocean University of South Florida St. Petersburg: Digital USFSP Antarctic Southern Ocean The Antarctic Nature Communications 8 1 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Cryospheric science Palaeoclimate Life Sciences |
spellingShingle |
Cryospheric science Palaeoclimate Life Sciences Graham, Alastair G. C. Kuhn, Gerhard Meisel, Ove Hillenbrand, Claus-Dieter Hodgson, Dominic A. Ehrmann, Werner Wacker, Lukas Wintersteller, Paul dos Santos Ferreira, Santos Ferreira, Römer, Miriam White, Duanne Bohrmann, Gerhard Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation |
topic_facet |
Cryospheric science Palaeoclimate Life Sciences |
description |
The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and termination on sub-Antarctic South Georgia in particular. Here, using sea-floor geophysical data and marine sediment cores, we resolve the record of glaciation offshore of South Georgia through the transition from the Last Glacial Maximum to Holocene. We show a sea-bed landform imprint of a shelf-wide last glacial advance and progressive deglaciation. Renewed glacier resurgence in the fjords between c. 15,170 and 13,340 yr ago coincided with a period of cooler, wetter climate known as the Antarctic Cold Reversal, revealing a cryospheric response to an Antarctic climate pattern extending into the Atlantic sector of the Southern Ocean. We conclude that the last glaciation of South Georgia was extensive, and the sensitivity of its glaciers to climate variability during the last termination more significant than implied by previous studies. The glaciated history of South Georgia is debated, with many suggesting a coastal limit to the island’s ice cap during the last glaciation. Here, the authors show extensive ice-cap cover of the continental block during this time and a readvance of glaciers to fjord mouths during the Antarctic Cold Reversal. |
format |
Article in Journal/Newspaper |
author |
Graham, Alastair G. C. Kuhn, Gerhard Meisel, Ove Hillenbrand, Claus-Dieter Hodgson, Dominic A. Ehrmann, Werner Wacker, Lukas Wintersteller, Paul dos Santos Ferreira, Santos Ferreira, Römer, Miriam White, Duanne Bohrmann, Gerhard |
author_facet |
Graham, Alastair G. C. Kuhn, Gerhard Meisel, Ove Hillenbrand, Claus-Dieter Hodgson, Dominic A. Ehrmann, Werner Wacker, Lukas Wintersteller, Paul dos Santos Ferreira, Santos Ferreira, Römer, Miriam White, Duanne Bohrmann, Gerhard |
author_sort |
Graham, Alastair G. C. |
title |
Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation |
title_short |
Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation |
title_full |
Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation |
title_fullStr |
Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation |
title_full_unstemmed |
Major Advance of South Georgia Glaciers during the Antarctic Cold Reversal Following Extensive Sub-Antarctic Glaciation |
title_sort |
major advance of south georgia glaciers during the antarctic cold reversal following extensive sub-antarctic glaciation |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2017 |
url |
https://digitalcommons.usf.edu/msc_facpub/1579 https://doi.org/10.1038/ncomms14798 https://digitalcommons.usf.edu/context/msc_facpub/article/2541/viewcontent/ncomms14798.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ice cap Southern Ocean |
genre_facet |
Antarc* Antarctic Ice cap Southern Ocean |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1579 doi:10.1038/ncomms14798 https://digitalcommons.usf.edu/context/msc_facpub/article/2541/viewcontent/ncomms14798.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/ncomms14798 |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
_version_ |
1772821382317473792 |