Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula
We use lake sediment records from an epishelf lake on Alexander Island to provide a detailed picture of the Holocene history of George VI Ice Shelf (GVI-IS). Core analyses included; micropaleontology (diatoms/foraminifera), stable isotope (δ18O, δ13C), geochemistry (total organic carbon (TOC), total...
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ftnerc:oai:nora.nerc.ac.uk:1235 2024-06-09T07:38:08+00:00 Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula Smith, James A. Bentley, Michael J. Hodgson, Dominic A. Roberts, Stephen J. Leng, Melanie J. Lloyd, Jeremy M. Barrett, Melissa S. Bryant, Charlotte Sugden, David E. 2007 http://nora.nerc.ac.uk/id/eprint/1235/ https://doi.org/10.1016/j.quascirev.2006.05.006 unknown Elsevier Smith, James A. orcid:0000-0002-1333-2544 Bentley, Michael J.; Hodgson, Dominic A. orcid:0000-0002-3841-3746 Roberts, Stephen J. orcid:0000-0003-3407-9127 Leng, Melanie J. orcid:0000-0003-1115-5166 Lloyd, Jeremy M.; Barrett, Melissa S.; Bryant, Charlotte; Sugden, David E. 2007 Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula. Quaternary Science Reviews, 26 (3-4). 500-516. https://doi.org/10.1016/j.quascirev.2006.05.006 <https://doi.org/10.1016/j.quascirev.2006.05.006> Glaciology Earth Sciences Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1016/j.quascirev.2006.05.006 2024-05-15T08:39:04Z We use lake sediment records from an epishelf lake on Alexander Island to provide a detailed picture of the Holocene history of George VI Ice Shelf (GVI-IS). Core analyses included; micropaleontology (diatoms/foraminifera), stable isotope (δ18O, δ13C), geochemistry (total organic carbon (TOC), total nitrogen (TN), C/N ratios) and grain-size analyses. These data provide robust evidence for one period of past ice shelf absence during the early Holocene. The timing of this period has been constrained by 10 AMS 14C dates performed on mono-specific foraminifera samples. These dates suggest that GVI-IS was absent between c 9600 cal yr BP and c 7730 cal yr BP. This early Holocene collapse immediately followed a period of maximum Holocene warmth that is recorded in some Antarctic ice cores and coincides with an influx of warmer ocean water onto the western Antarctic Peninsula (AP) shelf at c 9000 cal yr BP. The absence of a currently extant ice shelf during this time interval suggests that early Holocene ocean-atmosphere variability in the AP was greater than that measured in recent decades. Article in Journal/Newspaper Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica George VI Ice Shelf Ice Shelf Natural Environment Research Council: NERC Open Research Archive Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) Antarctic Antarctic Peninsula George VI Ice Shelf ENVELOPE(-67.840,-67.840,-71.692,-71.692) Quaternary Science Reviews 26 3-4 500 516 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Glaciology Earth Sciences |
spellingShingle |
Glaciology Earth Sciences Smith, James A. Bentley, Michael J. Hodgson, Dominic A. Roberts, Stephen J. Leng, Melanie J. Lloyd, Jeremy M. Barrett, Melissa S. Bryant, Charlotte Sugden, David E. Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula |
topic_facet |
Glaciology Earth Sciences |
description |
We use lake sediment records from an epishelf lake on Alexander Island to provide a detailed picture of the Holocene history of George VI Ice Shelf (GVI-IS). Core analyses included; micropaleontology (diatoms/foraminifera), stable isotope (δ18O, δ13C), geochemistry (total organic carbon (TOC), total nitrogen (TN), C/N ratios) and grain-size analyses. These data provide robust evidence for one period of past ice shelf absence during the early Holocene. The timing of this period has been constrained by 10 AMS 14C dates performed on mono-specific foraminifera samples. These dates suggest that GVI-IS was absent between c 9600 cal yr BP and c 7730 cal yr BP. This early Holocene collapse immediately followed a period of maximum Holocene warmth that is recorded in some Antarctic ice cores and coincides with an influx of warmer ocean water onto the western Antarctic Peninsula (AP) shelf at c 9000 cal yr BP. The absence of a currently extant ice shelf during this time interval suggests that early Holocene ocean-atmosphere variability in the AP was greater than that measured in recent decades. |
format |
Article in Journal/Newspaper |
author |
Smith, James A. Bentley, Michael J. Hodgson, Dominic A. Roberts, Stephen J. Leng, Melanie J. Lloyd, Jeremy M. Barrett, Melissa S. Bryant, Charlotte Sugden, David E. |
author_facet |
Smith, James A. Bentley, Michael J. Hodgson, Dominic A. Roberts, Stephen J. Leng, Melanie J. Lloyd, Jeremy M. Barrett, Melissa S. Bryant, Charlotte Sugden, David E. |
author_sort |
Smith, James A. |
title |
Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula |
title_short |
Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula |
title_full |
Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula |
title_fullStr |
Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula |
title_full_unstemmed |
Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula |
title_sort |
oceanic and atmospheric forcing of early holocene ice shelf retreat, george vi ice shelf, antarctica peninsula |
publisher |
Elsevier |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/1235/ https://doi.org/10.1016/j.quascirev.2006.05.006 |
long_lat |
ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-67.840,-67.840,-71.692,-71.692) |
geographic |
Alexander Island Antarctic Antarctic Peninsula George VI Ice Shelf |
geographic_facet |
Alexander Island Antarctic Antarctic Peninsula George VI Ice Shelf |
genre |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica George VI Ice Shelf Ice Shelf |
genre_facet |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica George VI Ice Shelf Ice Shelf |
op_relation |
Smith, James A. orcid:0000-0002-1333-2544 Bentley, Michael J.; Hodgson, Dominic A. orcid:0000-0002-3841-3746 Roberts, Stephen J. orcid:0000-0003-3407-9127 Leng, Melanie J. orcid:0000-0003-1115-5166 Lloyd, Jeremy M.; Barrett, Melissa S.; Bryant, Charlotte; Sugden, David E. 2007 Oceanic and atmospheric forcing of early Holocene ice shelf retreat, George VI Ice Shelf, Antarctica Peninsula. Quaternary Science Reviews, 26 (3-4). 500-516. https://doi.org/10.1016/j.quascirev.2006.05.006 <https://doi.org/10.1016/j.quascirev.2006.05.006> |
op_doi |
https://doi.org/10.1016/j.quascirev.2006.05.006 |
container_title |
Quaternary Science Reviews |
container_volume |
26 |
container_issue |
3-4 |
container_start_page |
500 |
op_container_end_page |
516 |
_version_ |
1801370595499180032 |