Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet
© 2018 University of Washington. Published by Cambridge University Press. The subantarctic island of South Georgia provides terrestrial and coastal marine records of climate variability, which are crucial for the understanding of the drivers of Holocene climate changes in the subantarctic region. He...
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Online Access: | https://doi.org/10.1017/qua.2018.85 https://nottingham-repository.worktribe.com/file/1350148/1/Holocene%20glacier%20fluctuations https://nottingham-repository.worktribe.com/output/1350148 |
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ftunnottinghamrr:oai:nottingham-repository.worktribe.com:1350148 2023-05-15T13:54:56+02:00 Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet Berg, Sonja White, Duanne A. Jivcov, Sandra Melles, Martin Leng, Melanie J. Rethemeyer, Janet Allen, Claire Perren, Bianca Bennike, Ole Viehberg, Finn 2018-10-30 https://doi.org/10.1017/qua.2018.85 https://nottingham-repository.worktribe.com/file/1350148/1/Holocene%20glacier%20fluctuations https://nottingham-repository.worktribe.com/output/1350148 unknown Cambridge University Press (CUP) https://nottingham-repository.worktribe.com/output/1350148 Quaternary Research (United States) Volume 91 Issue 1 Pagination 132-148 doi:https://doi.org/10.1017/qua.2018.85 https://nottingham-repository.worktribe.com/file/1350148/1/Holocene%20glacier%20fluctuations 0033-5894 doi:10.1017/qua.2018.85 openAccess Earth-Surface Processes Arts and Humanities (miscellaneous) General Earth and Planetary Sciences Journal Article acceptedVersion 2018 ftunnottinghamrr https://doi.org/10.1017/qua.2018.85 2022-10-13T22:12:36Z © 2018 University of Washington. Published by Cambridge University Press. The subantarctic island of South Georgia provides terrestrial and coastal marine records of climate variability, which are crucial for the understanding of the drivers of Holocene climate changes in the subantarctic region. Here we investigate a sediment core (Co1305) from a coastal inlet on South Georgia using elemental, lipid biomarker, diatom, and stable isotope data to infer changes in environmental conditions and to constrain the timing of late-glacial and Holocene glacier fluctuations. Because of the scarcity of terrestrial macrofossils and the presence of redeposited and relict organic matter in the sediments, age control for the record was obtained by compound-specific radiocarbon dating of mostly marine-derived n-C16 fatty acids. A basal till layer recovered in Little Jason Lagoon was likely deposited during an advance of local glaciers during the Antarctic cold reversal. After glacier retreat, an oligotrophic lake occupied the site, which transitioned to a marine inlet around 8.0±0.9 ka because of relative sea-level rise. From 7.0±0.6 to 4.0±0.4 ka, reduced vegetation coverage in the catchment, as well as high siliciclastic input and deposition of ice-rafted debris, indicates glacier advances in the terrestrial catchment and likely in the adjacent fjord. A second, less extensive period of glacier advances occurred in the late Holocene, after 1.8±0.3 ka. Article in Journal/Newspaper Antarc* Antarctic University of Nottingham: Repository@Nottingham Antarctic The Antarctic Little Jason ENVELOPE(-36.600,-36.600,-54.183,-54.183) Little Jason Lagoon ENVELOPE(-36.600,-36.600,-54.183,-54.183) Quaternary Research 91 1 132 148 |
institution |
Open Polar |
collection |
University of Nottingham: Repository@Nottingham |
op_collection_id |
ftunnottinghamrr |
language |
unknown |
topic |
Earth-Surface Processes Arts and Humanities (miscellaneous) General Earth and Planetary Sciences |
spellingShingle |
Earth-Surface Processes Arts and Humanities (miscellaneous) General Earth and Planetary Sciences Berg, Sonja White, Duanne A. Jivcov, Sandra Melles, Martin Leng, Melanie J. Rethemeyer, Janet Allen, Claire Perren, Bianca Bennike, Ole Viehberg, Finn Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet |
topic_facet |
Earth-Surface Processes Arts and Humanities (miscellaneous) General Earth and Planetary Sciences |
description |
© 2018 University of Washington. Published by Cambridge University Press. The subantarctic island of South Georgia provides terrestrial and coastal marine records of climate variability, which are crucial for the understanding of the drivers of Holocene climate changes in the subantarctic region. Here we investigate a sediment core (Co1305) from a coastal inlet on South Georgia using elemental, lipid biomarker, diatom, and stable isotope data to infer changes in environmental conditions and to constrain the timing of late-glacial and Holocene glacier fluctuations. Because of the scarcity of terrestrial macrofossils and the presence of redeposited and relict organic matter in the sediments, age control for the record was obtained by compound-specific radiocarbon dating of mostly marine-derived n-C16 fatty acids. A basal till layer recovered in Little Jason Lagoon was likely deposited during an advance of local glaciers during the Antarctic cold reversal. After glacier retreat, an oligotrophic lake occupied the site, which transitioned to a marine inlet around 8.0±0.9 ka because of relative sea-level rise. From 7.0±0.6 to 4.0±0.4 ka, reduced vegetation coverage in the catchment, as well as high siliciclastic input and deposition of ice-rafted debris, indicates glacier advances in the terrestrial catchment and likely in the adjacent fjord. A second, less extensive period of glacier advances occurred in the late Holocene, after 1.8±0.3 ka. |
format |
Article in Journal/Newspaper |
author |
Berg, Sonja White, Duanne A. Jivcov, Sandra Melles, Martin Leng, Melanie J. Rethemeyer, Janet Allen, Claire Perren, Bianca Bennike, Ole Viehberg, Finn |
author_facet |
Berg, Sonja White, Duanne A. Jivcov, Sandra Melles, Martin Leng, Melanie J. Rethemeyer, Janet Allen, Claire Perren, Bianca Bennike, Ole Viehberg, Finn |
author_sort |
Berg, Sonja |
title |
Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet |
title_short |
Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet |
title_full |
Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet |
title_fullStr |
Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet |
title_full_unstemmed |
Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet |
title_sort |
holocene glacier fluctuations and environmental changes in subantarctic south georgia inferred from a sediment record from a coastal inlet |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
https://doi.org/10.1017/qua.2018.85 https://nottingham-repository.worktribe.com/file/1350148/1/Holocene%20glacier%20fluctuations https://nottingham-repository.worktribe.com/output/1350148 |
long_lat |
ENVELOPE(-36.600,-36.600,-54.183,-54.183) ENVELOPE(-36.600,-36.600,-54.183,-54.183) |
geographic |
Antarctic The Antarctic Little Jason Little Jason Lagoon |
geographic_facet |
Antarctic The Antarctic Little Jason Little Jason Lagoon |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://nottingham-repository.worktribe.com/output/1350148 Quaternary Research (United States) Volume 91 Issue 1 Pagination 132-148 doi:https://doi.org/10.1017/qua.2018.85 https://nottingham-repository.worktribe.com/file/1350148/1/Holocene%20glacier%20fluctuations 0033-5894 doi:10.1017/qua.2018.85 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1017/qua.2018.85 |
container_title |
Quaternary Research |
container_volume |
91 |
container_issue |
1 |
container_start_page |
132 |
op_container_end_page |
148 |
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1766261128681226240 |