Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula
The timing of the most recent Neoglacial advance in the Antarctic Peninsula is important for establishing global climate teleconnections and providing important post-glacial rebound corrections to gravity-based satellite measurements of ice loss. However, obtaining accurate ages from terrestrial geo...
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Format: | Dataset |
Language: | English |
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PANGAEA
2012
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.818401 https://doi.org/10.1594/PANGAEA.818401 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.818401 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age dated error Calculated Dose rate sediment ELEVATION Equivalent dose relative LATITUDE LONGITUDE NBP07-03_Land NBP07-03_PT OUTCROP Outcrop sample Potter Cove King George Island Antarctic Peninsula Sample ID |
spellingShingle |
Age dated error Calculated Dose rate sediment ELEVATION Equivalent dose relative LATITUDE LONGITUDE NBP07-03_Land NBP07-03_PT OUTCROP Outcrop sample Potter Cove King George Island Antarctic Peninsula Sample ID Simms, Alexander R Ivins, Erik DeWitt, Regina Kouremenos, Peter Simkins, Lauren M Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula |
topic_facet |
Age dated error Calculated Dose rate sediment ELEVATION Equivalent dose relative LATITUDE LONGITUDE NBP07-03_Land NBP07-03_PT OUTCROP Outcrop sample Potter Cove King George Island Antarctic Peninsula Sample ID |
description |
The timing of the most recent Neoglacial advance in the Antarctic Peninsula is important for establishing global climate teleconnections and providing important post-glacial rebound corrections to gravity-based satellite measurements of ice loss. However, obtaining accurate ages from terrestrial geomorphic and sedimentary indicators of the most recent Neoglacial advance in Antarctica has been hampered by the lack of historical records and the difficulty of dating materials in Antarctica. Here we use a new approach to dating flights of raised beaches in the South Shetland Islands of the northern Antarctic Peninsula to bracket the age of a Neoglacial advance that occurred between 1500 and 1700 AD, broadly synchronous with compilations for the timing of the Little Ice Age in the northern hemisphere. Our approach is based on optically stimulated luminescence of the underside of buried cobbles to obtain the age of beaches previously shown to have been deposited immediately inside and outside the moraines of the most recent Neoglacial advance. In addition, these beaches mark the timing of an apparent change in the rate of isostatic rebound thought to be in response to the same glacial advance within the South Shetland Islands. We use a Maxwell viscoelastic model of glacial-isostatic adjustment (GIA) to determine whether the rates of uplift calculated from the raised beaches are realistic given the limited constraints on the ice advance during this most recent Neoglacial advance. Our rebound model suggests that the subsequent melting of an additional 16-22% increase in the volume of ice within the South Shetland Islands would result in a subsequent uplift rate of 12.5 mm/yr that lasted until 1840 AD resulting in a cumulative uplift of 2.5 m. This uplift rate and magnitude are in close agreement with observed rates and magnitudes calculated from the raised beaches since the most recent Neoglacial advance along the South Shetland Islands and falls within the range of uplift rates from similar settings such as Alaska. |
format |
Dataset |
author |
Simms, Alexander R Ivins, Erik DeWitt, Regina Kouremenos, Peter Simkins, Lauren M |
author_facet |
Simms, Alexander R Ivins, Erik DeWitt, Regina Kouremenos, Peter Simkins, Lauren M |
author_sort |
Simms, Alexander R |
title |
Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula |
title_short |
Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula |
title_full |
Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula |
title_fullStr |
Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula |
title_full_unstemmed |
Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula |
title_sort |
timing of the most recent neoglacial advance and retreat in potter cove, antarctic peninsula |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.818401 https://doi.org/10.1594/PANGAEA.818401 |
op_coverage |
MEDIAN LATITUDE: -62.237472 * MEDIAN LONGITUDE: -58.720062 * SOUTH-BOUND LATITUDE: -62.237619 * WEST-BOUND LONGITUDE: -58.720069 * NORTH-BOUND LATITUDE: -62.237178 * EAST-BOUND LONGITUDE: -58.720058 * MINIMUM ELEVATION: 2 m a.s.l. * MAXIMUM ELEVATION: 17 m a.s.l. |
long_lat |
ENVELOPE(-58.720069,-58.720058,-62.237178,-62.237619) |
geographic |
Antarctic The Antarctic Antarctic Peninsula King George Island South Shetland Islands Potter Cove |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula King George Island South Shetland Islands Potter Cove |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica King George Island South Shetland Islands Alaska |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica King George Island South Shetland Islands Alaska |
op_source |
Supplement to: Simms, Alexander R; Ivins, Erik; DeWitt, Regina; Kouremenos, Peter; Simkins, Lauren M (2012): Timing of the most recent Neoglacial advance and retreat in the South Shetland Islands, Antarctic Peninsula: insights from raised beaches and Holocene uplift rates. Quaternary Science Reviews, 47, 41-55, https://doi.org/10.1016/j.quascirev.2012.05.013 |
op_relation |
Galbraith, R F; Roberts, R G; Laslett, M; Yoshida, H; Olley, J M (1999): Optical dating of single and multiple grains of quartz from Jinmium Rock Shelter, northern Australia: Part I, Experimental design and statistcal models. Archaeometry, 41(2), 339-364, https://doi.org/10.1111/j.1475-4754.1999.tb00987.x https://doi.pangaea.de/10.1594/PANGAEA.818401 https://doi.org/10.1594/PANGAEA.818401 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.818401 https://doi.org/10.1016/j.quascirev.2012.05.013 https://doi.org/10.1111/j.1475-4754.1999.tb00987.x |
_version_ |
1766252412278931456 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.818401 2023-05-15T13:49:51+02:00 Timing of the most recent Neoglacial advance and retreat in Potter Cove, Antarctic Peninsula Simms, Alexander R Ivins, Erik DeWitt, Regina Kouremenos, Peter Simkins, Lauren M MEDIAN LATITUDE: -62.237472 * MEDIAN LONGITUDE: -58.720062 * SOUTH-BOUND LATITUDE: -62.237619 * WEST-BOUND LONGITUDE: -58.720069 * NORTH-BOUND LATITUDE: -62.237178 * EAST-BOUND LONGITUDE: -58.720058 * MINIMUM ELEVATION: 2 m a.s.l. * MAXIMUM ELEVATION: 17 m a.s.l. 2012-08-26 text/tab-separated-values, 22 data points https://doi.pangaea.de/10.1594/PANGAEA.818401 https://doi.org/10.1594/PANGAEA.818401 en eng PANGAEA Galbraith, R F; Roberts, R G; Laslett, M; Yoshida, H; Olley, J M (1999): Optical dating of single and multiple grains of quartz from Jinmium Rock Shelter, northern Australia: Part I, Experimental design and statistcal models. Archaeometry, 41(2), 339-364, https://doi.org/10.1111/j.1475-4754.1999.tb00987.x https://doi.pangaea.de/10.1594/PANGAEA.818401 https://doi.org/10.1594/PANGAEA.818401 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Simms, Alexander R; Ivins, Erik; DeWitt, Regina; Kouremenos, Peter; Simkins, Lauren M (2012): Timing of the most recent Neoglacial advance and retreat in the South Shetland Islands, Antarctic Peninsula: insights from raised beaches and Holocene uplift rates. Quaternary Science Reviews, 47, 41-55, https://doi.org/10.1016/j.quascirev.2012.05.013 Age dated error Calculated Dose rate sediment ELEVATION Equivalent dose relative LATITUDE LONGITUDE NBP07-03_Land NBP07-03_PT OUTCROP Outcrop sample Potter Cove King George Island Antarctic Peninsula Sample ID Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.818401 https://doi.org/10.1016/j.quascirev.2012.05.013 https://doi.org/10.1111/j.1475-4754.1999.tb00987.x 2023-01-20T09:01:31Z The timing of the most recent Neoglacial advance in the Antarctic Peninsula is important for establishing global climate teleconnections and providing important post-glacial rebound corrections to gravity-based satellite measurements of ice loss. However, obtaining accurate ages from terrestrial geomorphic and sedimentary indicators of the most recent Neoglacial advance in Antarctica has been hampered by the lack of historical records and the difficulty of dating materials in Antarctica. Here we use a new approach to dating flights of raised beaches in the South Shetland Islands of the northern Antarctic Peninsula to bracket the age of a Neoglacial advance that occurred between 1500 and 1700 AD, broadly synchronous with compilations for the timing of the Little Ice Age in the northern hemisphere. Our approach is based on optically stimulated luminescence of the underside of buried cobbles to obtain the age of beaches previously shown to have been deposited immediately inside and outside the moraines of the most recent Neoglacial advance. In addition, these beaches mark the timing of an apparent change in the rate of isostatic rebound thought to be in response to the same glacial advance within the South Shetland Islands. We use a Maxwell viscoelastic model of glacial-isostatic adjustment (GIA) to determine whether the rates of uplift calculated from the raised beaches are realistic given the limited constraints on the ice advance during this most recent Neoglacial advance. Our rebound model suggests that the subsequent melting of an additional 16-22% increase in the volume of ice within the South Shetland Islands would result in a subsequent uplift rate of 12.5 mm/yr that lasted until 1840 AD resulting in a cumulative uplift of 2.5 m. This uplift rate and magnitude are in close agreement with observed rates and magnitudes calculated from the raised beaches since the most recent Neoglacial advance along the South Shetland Islands and falls within the range of uplift rates from similar settings such as Alaska. Dataset Antarc* Antarctic Antarctic Peninsula Antarctica King George Island South Shetland Islands Alaska PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic Antarctic Peninsula King George Island South Shetland Islands Potter Cove ENVELOPE(-58.720069,-58.720058,-62.237178,-62.237619) |