Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica
Limited information on the East Antarctic Ice Sheet (EAIS) geometry during Marine Isotope Stage 3 (MIS 3; 60-25 ka) restricts our understanding of its behaviour during periods of climate and sea level change. Ice sheet models forced by global parameters suggest an expanded EAIS compared to the Holoc...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.866393 2024-10-13T14:03:25+00:00 Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica Berg, Sonja LATITUDE: -68.811900 * LONGITUDE: 77.869550 * DATE/TIME START: 2007-03-07T00:00:00 * DATE/TIME END: 2007-03-07T00:00:00 2016 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.866393 https://doi.org/10.1594/PANGAEA.866393 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.866393 https://doi.org/10.1594/PANGAEA.866393 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Berg, Sonja; White, Duanne A; Bennike, Ole; Fülop, Réka-H; Fink, David; Wagner, Bernd; Melles, Martin (2016): Unglaciated areas in East Antarctica during the Last Glacial (Marine Isotope Stage 3) – New evidence from Rauer Group. Quaternary Science Reviews, 153, 1-10, https://doi.org/10.1016/j.quascirev.2016.08.021 ANT-XXIII/9 Co1008 Core Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS69 Skua Lake Filla SPP1158 dataset publication series 2016 ftpangaea https://doi.org/10.1594/PANGAEA.86639310.1016/j.quascirev.2016.08.021 2024-10-02T00:42:45Z Limited information on the East Antarctic Ice Sheet (EAIS) geometry during Marine Isotope Stage 3 (MIS 3; 60-25 ka) restricts our understanding of its behaviour during periods of climate and sea level change. Ice sheet models forced by global parameters suggest an expanded EAIS compared to the Holocene during MIS 3, but field evidence from East Antarctic coastal areas contradicts such modelling, and suggests that the ice sheet margins were no more advanced than at present. Here we present a new lake sediment record, and cosmogenic exposure results from bedrock, which confirm that Rauer Group (eastern Prydz Bay) was ice-free for much of MIS 3. We also refine the likely duration of the Last Glacial Maximum (LGM) glaciation in the region. Lacustrine and marine sediments from Rauer Group indicate the penultimate period of ice retreat predates 50 ka. The lacustrine record indicates a change from warmer/wetter conditions to cooler/drier conditions after ca. 35 ka. Substantive ice sheet re-advance, however, may not have occurred until much closer to 20 ka. Contemporary coastal areas were still connected to the sea during MIS 3, restricting the possible extent of grounded ice in Prydz Bay on the continental shelf. In contrast, relative sea levels (RSL) deduced from field evidence indicate an extra ice load averaging several hundred metres thicker ice across the Bay between 45 and 32 ka. Thus, ice must either have been thicker immediately inland (with a steeper ice profile), or there were additional ice domes on the shallow banks of the outer continental shelf. Further work is required to reconcile the differences between empirical evidence of past ice sheet histories, and the history predicted by ice sheet models from far-field temperature and sea level records. Other/Unknown Material Antarc* Antarctic Antarctica Arctic East Antarctica Ice Sheet Prydz Bay Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Rauer Group ENVELOPE(77.833,77.833,-68.850,-68.850) New Lake ENVELOPE(-109.468,-109.468,62.684,62.684) Skua Lake ENVELOPE(166.417,166.417,-77.633,-77.633) ENVELOPE(77.869550,77.869550,-68.811900,-68.811900) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XXIII/9 Co1008 Core Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS69 Skua Lake Filla SPP1158 |
spellingShingle |
ANT-XXIII/9 Co1008 Core Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS69 Skua Lake Filla SPP1158 Berg, Sonja Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica |
topic_facet |
ANT-XXIII/9 Co1008 Core Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS69 Skua Lake Filla SPP1158 |
description |
Limited information on the East Antarctic Ice Sheet (EAIS) geometry during Marine Isotope Stage 3 (MIS 3; 60-25 ka) restricts our understanding of its behaviour during periods of climate and sea level change. Ice sheet models forced by global parameters suggest an expanded EAIS compared to the Holocene during MIS 3, but field evidence from East Antarctic coastal areas contradicts such modelling, and suggests that the ice sheet margins were no more advanced than at present. Here we present a new lake sediment record, and cosmogenic exposure results from bedrock, which confirm that Rauer Group (eastern Prydz Bay) was ice-free for much of MIS 3. We also refine the likely duration of the Last Glacial Maximum (LGM) glaciation in the region. Lacustrine and marine sediments from Rauer Group indicate the penultimate period of ice retreat predates 50 ka. The lacustrine record indicates a change from warmer/wetter conditions to cooler/drier conditions after ca. 35 ka. Substantive ice sheet re-advance, however, may not have occurred until much closer to 20 ka. Contemporary coastal areas were still connected to the sea during MIS 3, restricting the possible extent of grounded ice in Prydz Bay on the continental shelf. In contrast, relative sea levels (RSL) deduced from field evidence indicate an extra ice load averaging several hundred metres thicker ice across the Bay between 45 and 32 ka. Thus, ice must either have been thicker immediately inland (with a steeper ice profile), or there were additional ice domes on the shallow banks of the outer continental shelf. Further work is required to reconcile the differences between empirical evidence of past ice sheet histories, and the history predicted by ice sheet models from far-field temperature and sea level records. |
format |
Other/Unknown Material |
author |
Berg, Sonja |
author_facet |
Berg, Sonja |
author_sort |
Berg, Sonja |
title |
Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica |
title_short |
Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica |
title_full |
Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica |
title_fullStr |
Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica |
title_full_unstemmed |
Contents of water, sulphur, total organic and inorganic carbon, XRF counts of Ti, S and Ca and radiocarbon ages of sediment core Co1008 from Skua Lake, Rauer Group, East Antarctica |
title_sort |
contents of water, sulphur, total organic and inorganic carbon, xrf counts of ti, s and ca and radiocarbon ages of sediment core co1008 from skua lake, rauer group, east antarctica |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.866393 https://doi.org/10.1594/PANGAEA.866393 |
op_coverage |
LATITUDE: -68.811900 * LONGITUDE: 77.869550 * DATE/TIME START: 2007-03-07T00:00:00 * DATE/TIME END: 2007-03-07T00:00:00 |
long_lat |
ENVELOPE(77.833,77.833,-68.850,-68.850) ENVELOPE(-109.468,-109.468,62.684,62.684) ENVELOPE(166.417,166.417,-77.633,-77.633) ENVELOPE(77.869550,77.869550,-68.811900,-68.811900) |
geographic |
Arctic Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Rauer Group New Lake Skua Lake |
geographic_facet |
Arctic Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Rauer Group New Lake Skua Lake |
genre |
Antarc* Antarctic Antarctica Arctic East Antarctica Ice Sheet Prydz Bay Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Arctic East Antarctica Ice Sheet Prydz Bay Sea ice |
op_source |
Supplement to: Berg, Sonja; White, Duanne A; Bennike, Ole; Fülop, Réka-H; Fink, David; Wagner, Bernd; Melles, Martin (2016): Unglaciated areas in East Antarctica during the Last Glacial (Marine Isotope Stage 3) – New evidence from Rauer Group. Quaternary Science Reviews, 153, 1-10, https://doi.org/10.1016/j.quascirev.2016.08.021 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.866393 https://doi.org/10.1594/PANGAEA.866393 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.86639310.1016/j.quascirev.2016.08.021 |
_version_ |
1812808397970472960 |