Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models.
Geomorphological descriptions of changes in the extent of the Greenland Ice Sheet (GIS) have been combined with glacial-isostatic-adjustment models to reproduce the sea-level history of Greenland since the Last Glacial Maximum (LGM). The contribution to past sea-level change around Greenland due to...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/88610 2024-01-14T10:06:32+01:00 Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models. Fleming, Kevin Lambeck, Kurt http://hdl.handle.net/1885/88610 https://doi.org/10.1016/j.quascirev.2003.11.001 https://openresearch-repository.anu.edu.au/bitstream/1885/88610/5/MigratedxPub18361_Lambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/88610/7/01_Fleming_Constraints_on_the_Greenland_2004.pdf.jpg unknown Pergamon-Elsevier Ltd 0277-3791 http://hdl.handle.net/1885/88610 doi:10.1016/j.quascirev.2003.11.001 https://openresearch-repository.anu.edu.au/bitstream/1885/88610/5/MigratedxPub18361_Lambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/88610/7/01_Fleming_Constraints_on_the_Greenland_2004.pdf.jpg Quaternary Science Reviews Keywords: Climate change Coastal zones Constraint theory Ice Mathematical models Regression analysis Sea level Greenland ice sheet Last glacial maximum (LGL) Glacial geology glacial rebound glacioisostasy Last Glacial Maximum sea level change Younger Journal article ftanucanberra https://doi.org/10.1016/j.quascirev.2003.11.001 2023-12-15T09:36:52Z Geomorphological descriptions of changes in the extent of the Greenland Ice Sheet (GIS) have been combined with glacial-isostatic-adjustment models to reproduce the sea-level history of Greenland since the Last Glacial Maximum (LGM). The contribution to past sea-level change around Greenland due to ice-load changes outside of that region has been considerable (± 10's of meters), while still contributing a rise of several mm yr-1 today. The isostatic contribution to relative sea level around Greenland from changes in the GIS is found by iteratively perturbing preliminary ice models with different LGM extents and deglaciation starting times. The resulting first-order model that provides the best agreement between observed and predicted sea level contributes 3.1 and 1.9 m water-equivalent of additional ice relative to present-day ice volumes at the LGM and Younger Dryas, respectively. The GIS in most areas does not appear to have extended far onto the continental shelf, the exceptions being southern-most Southwest Greenland and northern East Greenland, as well as at the coalescence of the Northwest Greenland and Innuitian Ice Sheets. Changes in ice thickness since the LGM were >500 m along the present-day outer coast and >1500 m along some parts of the present-day ice margin. The observed mid- to late-Holocene fall in sea level to below the present-day level and the subsequent transgression seen in some areas implies that the GIS retreated behind the present-day margin by distances of the order of 40 km before readvancing. Article in Journal/Newspaper East Greenland Greenland Ice Sheet Australian National University: ANU Digital Collections Greenland Quaternary Science Reviews 23 9-10 1053 1077 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Climate change Coastal zones Constraint theory Ice Mathematical models Regression analysis Sea level Greenland ice sheet Last glacial maximum (LGL) Glacial geology glacial rebound glacioisostasy Last Glacial Maximum sea level change Younger |
spellingShingle |
Keywords: Climate change Coastal zones Constraint theory Ice Mathematical models Regression analysis Sea level Greenland ice sheet Last glacial maximum (LGL) Glacial geology glacial rebound glacioisostasy Last Glacial Maximum sea level change Younger Fleming, Kevin Lambeck, Kurt Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models. |
topic_facet |
Keywords: Climate change Coastal zones Constraint theory Ice Mathematical models Regression analysis Sea level Greenland ice sheet Last glacial maximum (LGL) Glacial geology glacial rebound glacioisostasy Last Glacial Maximum sea level change Younger |
description |
Geomorphological descriptions of changes in the extent of the Greenland Ice Sheet (GIS) have been combined with glacial-isostatic-adjustment models to reproduce the sea-level history of Greenland since the Last Glacial Maximum (LGM). The contribution to past sea-level change around Greenland due to ice-load changes outside of that region has been considerable (± 10's of meters), while still contributing a rise of several mm yr-1 today. The isostatic contribution to relative sea level around Greenland from changes in the GIS is found by iteratively perturbing preliminary ice models with different LGM extents and deglaciation starting times. The resulting first-order model that provides the best agreement between observed and predicted sea level contributes 3.1 and 1.9 m water-equivalent of additional ice relative to present-day ice volumes at the LGM and Younger Dryas, respectively. The GIS in most areas does not appear to have extended far onto the continental shelf, the exceptions being southern-most Southwest Greenland and northern East Greenland, as well as at the coalescence of the Northwest Greenland and Innuitian Ice Sheets. Changes in ice thickness since the LGM were >500 m along the present-day outer coast and >1500 m along some parts of the present-day ice margin. The observed mid- to late-Holocene fall in sea level to below the present-day level and the subsequent transgression seen in some areas implies that the GIS retreated behind the present-day margin by distances of the order of 40 km before readvancing. |
format |
Article in Journal/Newspaper |
author |
Fleming, Kevin Lambeck, Kurt |
author_facet |
Fleming, Kevin Lambeck, Kurt |
author_sort |
Fleming, Kevin |
title |
Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models. |
title_short |
Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models. |
title_full |
Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models. |
title_fullStr |
Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models. |
title_full_unstemmed |
Constraints on the Greenland ice sheet since the Last Glacial Maximum from sea-level observations and glacial-rebound models. |
title_sort |
constraints on the greenland ice sheet since the last glacial maximum from sea-level observations and glacial-rebound models. |
publisher |
Pergamon-Elsevier Ltd |
url |
http://hdl.handle.net/1885/88610 https://doi.org/10.1016/j.quascirev.2003.11.001 https://openresearch-repository.anu.edu.au/bitstream/1885/88610/5/MigratedxPub18361_Lambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/88610/7/01_Fleming_Constraints_on_the_Greenland_2004.pdf.jpg |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland Greenland Ice Sheet |
genre_facet |
East Greenland Greenland Ice Sheet |
op_source |
Quaternary Science Reviews |
op_relation |
0277-3791 http://hdl.handle.net/1885/88610 doi:10.1016/j.quascirev.2003.11.001 https://openresearch-repository.anu.edu.au/bitstream/1885/88610/5/MigratedxPub18361_Lambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/88610/7/01_Fleming_Constraints_on_the_Greenland_2004.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.quascirev.2003.11.001 |
container_title |
Quaternary Science Reviews |
container_volume |
23 |
container_issue |
9-10 |
container_start_page |
1053 |
op_container_end_page |
1077 |
_version_ |
1788060996946886656 |