Sonja Berg
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
Authors
Duanne A. White
Sandra Jivcov
Martin Melles
PROFESSOR MELANIE LENG Melanie.Leng@nottingham.ac.uk
Professor of Isotope Geosciences
Janet Rethemeyer
Claire Allen
Bianca Perren
Ole Bennike
Finn Viehberg
Abstract
© 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.
Citation
Berg, S., White, D. A., Jivcov, S., Melles, M., Leng, M. J., Rethemeyer, J., …Viehberg, F. (2019). Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet. Quaternary Research, 91(1), 132-148. https://doi.org/10.1017/qua.2018.85
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 10, 2018 |
Online Publication Date | Oct 30, 2018 |
Publication Date | Jan 1, 2019 |
Deposit Date | Nov 30, 2018 |
Publicly Available Date | Nov 30, 2018 |
Journal | Quaternary Research (United States) |
Print ISSN | 0033-5894 |
Electronic ISSN | 1096-0287 |
Publisher | Cambridge University Press |
Peer Reviewed | Peer Reviewed |
Volume | 91 |
Issue | 1 |
Pages | 132-148 |
DOI | https://doi.org/10.1017/qua.2018.85 |
Keywords | Earth-Surface Processes; Arts and Humanities (miscellaneous); General Earth and Planetary Sciences |
Public URL | https://nottingham-repository.worktribe.com/output/1350148 |
Publisher URL | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/296A335B50C08320028BDC159B53692A/S0033589418000856a.pdf/holocene_glacier_fluctuations_and_environmental_changes_in_subantarctic_south_georgia_inferred_from_a_sediment_record_from_a_co |
Contract Date | Nov 30, 2018 |
Files
Holocene glacier fluctuations
(13.7 Mb)
PDF
You might also like
Human impact on the hydroenvironment of Lake Parishan, SW Iran, through the late-Holocene
(2015)
Journal Article
Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey
(2014)
Journal Article
Comparisons of observed and modelled lake δ18O variability
(2015)
Journal Article
Downloadable Citations
About Repository@Nottingham
Administrator e-mail: discovery-access-systems@nottingham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search