Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica
We surveyed and dated the former shorelines of one lake in the Shackleton Range and two lakes in the Pensacola Mountains, situated inland of the Weddell Sea embayment Antarctica between 80° and 85°S. These are amongst the highest latitude lakes in the Antarctic and are located in areas where there i...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/501697/ https://doi.org/10.1177/0959683612460790 |
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ftnerc:oai:nora.nerc.ac.uk:501697 2023-05-15T13:48:07+02:00 Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica Hodgson, D.A. Bentley, M.J. 2013-03 http://nora.nerc.ac.uk/id/eprint/501697/ https://doi.org/10.1177/0959683612460790 unknown SAGE Publications Hodgson, D.A. orcid:0000-0002-3841-3746 Bentley, M.J. 2013 Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica. The Holocene, 23 (3). 388-397. https://doi.org/10.1177/0959683612460790 <https://doi.org/10.1177/0959683612460790> Hydrology Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.1177/0959683612460790 2023-02-04T19:36:52Z We surveyed and dated the former shorelines of one lake in the Shackleton Range and two lakes in the Pensacola Mountains, situated inland of the Weddell Sea embayment Antarctica between 80° and 85°S. These are amongst the highest latitude lakes in the Antarctic and are located in areas where there is little or no Holocene climate and hydrological information. Surveys of the lake shorelines show that past water levels have been up to 15.7, 17.7 and 69.5 m higher than present in the three study lakes. AMS radiocarbon dating of lake-derived macrofossils showed that there was a sustained period of higher water levels from approximately 4300 and until sometime after 2250 cal. yr BP. This is interpreted as being the result of an increased number of meltwater events and/or degree-days above freezing, relative to the present. The closest comparable ice cores from the Dominion Range in the Transantarctic Mountains (85°S, 166°E) and the Plateau Remote ice core on the continental East Antarctic Ice Sheet (84°S, 43°E) also provide some evidence of a warmer period beginning at c. 4000–3500 yr BP and ending after 2000–1500 yr BP, as does a synthesis of oxygen isotope data from five Antarctic ice cores. This suggests that the well-documented mid- to late-Holocene warm period, measured in many lake and marine sediments around the coast of Antarctica, extended into these regions of the continental interior. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Sheet Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Weddell Sea East Antarctic Ice Sheet Shackleton Transantarctic Mountains Weddell Shackleton Range ENVELOPE(-26.000,-26.000,-80.833,-80.833) Pensacola Mountains ENVELOPE(-58.000,-58.000,-83.500,-83.500) Dominion Range ENVELOPE(166.500,166.500,-85.333,-85.333) The Holocene 23 3 388 397 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Hydrology |
spellingShingle |
Hydrology Hodgson, D.A. Bentley, M.J. Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica |
topic_facet |
Hydrology |
description |
We surveyed and dated the former shorelines of one lake in the Shackleton Range and two lakes in the Pensacola Mountains, situated inland of the Weddell Sea embayment Antarctica between 80° and 85°S. These are amongst the highest latitude lakes in the Antarctic and are located in areas where there is little or no Holocene climate and hydrological information. Surveys of the lake shorelines show that past water levels have been up to 15.7, 17.7 and 69.5 m higher than present in the three study lakes. AMS radiocarbon dating of lake-derived macrofossils showed that there was a sustained period of higher water levels from approximately 4300 and until sometime after 2250 cal. yr BP. This is interpreted as being the result of an increased number of meltwater events and/or degree-days above freezing, relative to the present. The closest comparable ice cores from the Dominion Range in the Transantarctic Mountains (85°S, 166°E) and the Plateau Remote ice core on the continental East Antarctic Ice Sheet (84°S, 43°E) also provide some evidence of a warmer period beginning at c. 4000–3500 yr BP and ending after 2000–1500 yr BP, as does a synthesis of oxygen isotope data from five Antarctic ice cores. This suggests that the well-documented mid- to late-Holocene warm period, measured in many lake and marine sediments around the coast of Antarctica, extended into these regions of the continental interior. |
format |
Article in Journal/Newspaper |
author |
Hodgson, D.A. Bentley, M.J. |
author_facet |
Hodgson, D.A. Bentley, M.J. |
author_sort |
Hodgson, D.A. |
title |
Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica |
title_short |
Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica |
title_full |
Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica |
title_fullStr |
Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica |
title_full_unstemmed |
Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica |
title_sort |
lake highstands in the pensacola mountains and shackleton range 4300-2250 cal. yr bp: evidence of a warm climate anomaly in the interior of antarctica |
publisher |
SAGE Publications |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/501697/ https://doi.org/10.1177/0959683612460790 |
long_lat |
ENVELOPE(-26.000,-26.000,-80.833,-80.833) ENVELOPE(-58.000,-58.000,-83.500,-83.500) ENVELOPE(166.500,166.500,-85.333,-85.333) |
geographic |
Antarctic The Antarctic Weddell Sea East Antarctic Ice Sheet Shackleton Transantarctic Mountains Weddell Shackleton Range Pensacola Mountains Dominion Range |
geographic_facet |
Antarctic The Antarctic Weddell Sea East Antarctic Ice Sheet Shackleton Transantarctic Mountains Weddell Shackleton Range Pensacola Mountains Dominion Range |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet Weddell Sea |
op_relation |
Hodgson, D.A. orcid:0000-0002-3841-3746 Bentley, M.J. 2013 Lake highstands in the Pensacola Mountains and Shackleton Range 4300-2250 cal. yr BP: Evidence of a warm climate anomaly in the interior of Antarctica. The Holocene, 23 (3). 388-397. https://doi.org/10.1177/0959683612460790 <https://doi.org/10.1177/0959683612460790> |
op_doi |
https://doi.org/10.1177/0959683612460790 |
container_title |
The Holocene |
container_volume |
23 |
container_issue |
3 |
container_start_page |
388 |
op_container_end_page |
397 |
_version_ |
1766248639072567296 |