A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0

The Greenland Ice Sheet is a large contributor to global sea level rise, and current mass losses are projected to accelerate. However, model projections of future ice sheet evolution are limited by the fact that the ice sheet is not in equilibrium with present-day climate but is still adjusting to p...

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Published in:Climate of the Past
Main Authors: Leger, Tancrède P.M., Clark, Christopher D., Huynh, Carla, Jones, Sharman, Ely, Jeremy C., Bradley, Sarah L., Diemont, Christiaan, Hughes, Anna L.C.
Format: Article in Journal/Newspaper
Language:English
Published: 2024
Subjects:
Online Access:https://research.manchester.ac.uk/en/publications/4ec3ebb3-ce7a-470b-aaaa-c14b3d82c6a6
https://doi.org/10.5194/cp-20-701-2024
http://www.scopus.com/inward/record.url?scp=85188902849&partnerID=8YFLogxK
https://cp.copernicus.org/preprints/cp-2023-60/cp-2023-60.pdf
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spelling ftumanchesterpub:oai:pure.atira.dk:publications/4ec3ebb3-ce7a-470b-aaaa-c14b3d82c6a6 2024-05-12T08:04:18+00:00 A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0 Leger, Tancrède P.M. Clark, Christopher D. Huynh, Carla Jones, Sharman Ely, Jeremy C. Bradley, Sarah L. Diemont, Christiaan Hughes, Anna L.C. 2024-03-28 https://research.manchester.ac.uk/en/publications/4ec3ebb3-ce7a-470b-aaaa-c14b3d82c6a6 https://doi.org/10.5194/cp-20-701-2024 http://www.scopus.com/inward/record.url?scp=85188902849&partnerID=8YFLogxK https://cp.copernicus.org/preprints/cp-2023-60/cp-2023-60.pdf eng eng https://research.manchester.ac.uk/en/publications/4ec3ebb3-ce7a-470b-aaaa-c14b3d82c6a6 info:eu-repo/semantics/openAccess Leger , T P M , Clark , C D , Huynh , C , Jones , S , Ely , J C , Bradley , S L , Diemont , C & Hughes , A L C 2024 , ' A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers : PaleoGrIS version 1.0 ' , Climate of the Past , vol. 20 , no. 3 , pp. 701-755 . https://doi.org/10.5194/cp-20-701-2024 article 2024 ftumanchesterpub https://doi.org/10.5194/cp-20-701-2024 2024-04-15T00:00:24Z The Greenland Ice Sheet is a large contributor to global sea level rise, and current mass losses are projected to accelerate. However, model projections of future ice sheet evolution are limited by the fact that the ice sheet is not in equilibrium with present-day climate but is still adjusting to past changes that occurred over thousands of years. While the influence of such committed adjustments on future ice sheet evolution remains unquantified, it could be addressed by calibrating numerical ice sheet models over larger timescales and, importantly, against empirical data on ice margin positions. To enable such paleo data-model interactions, we need Greenland-wide empirical reconstructions of past ice sheet extent that combine geomorphological and geochronological evidence. Despite an increasing number of field studies producing new chronologies, such a reconstruction is currently lacking in Greenland. Furthermore, a time slice reconstruction can help to (i) answer open questions regarding the rate and pattern of ice margin evolution in Greenland since the glacial maximum, (ii) develop a standardised record of empirical data, and (iii) identify new sites for future field campaigns. Based on these motivations, we here present PaleoGrIS 1.0, a new Greenland-wide isochrone reconstruction of ice sheet extent evolution through the Late Glacial and early-To mid-Holocene informed by both geomorphological and geochronological markers. Our isochrones have a temporal resolution of 500 years and span 1/4 7.5 kyr from approximately 14 to 6.5 kyr BP. We describe the resulting reconstruction of the shrinking ice sheet and conduct a series of ice-sheet-wide and regional analyses to quantify retreat rates, areal extent change, and their variability across space and time. During the Late Glacial and early-To mid-Holocene, we find the Greenland Ice Sheet has lost about one-Third of its areal extent (0.89 million km 2). Between 1/4 14 and 1/4 8.5 kyr BP, it experienced a near-constant rate of areal extent loss of 170 ± 27 km 2 ... Article in Journal/Newspaper Greenland Ice Sheet The University of Manchester: Research Explorer Greenland Climate of the Past 20 3 701 755
institution Open Polar
collection The University of Manchester: Research Explorer
op_collection_id ftumanchesterpub
language English
description The Greenland Ice Sheet is a large contributor to global sea level rise, and current mass losses are projected to accelerate. However, model projections of future ice sheet evolution are limited by the fact that the ice sheet is not in equilibrium with present-day climate but is still adjusting to past changes that occurred over thousands of years. While the influence of such committed adjustments on future ice sheet evolution remains unquantified, it could be addressed by calibrating numerical ice sheet models over larger timescales and, importantly, against empirical data on ice margin positions. To enable such paleo data-model interactions, we need Greenland-wide empirical reconstructions of past ice sheet extent that combine geomorphological and geochronological evidence. Despite an increasing number of field studies producing new chronologies, such a reconstruction is currently lacking in Greenland. Furthermore, a time slice reconstruction can help to (i) answer open questions regarding the rate and pattern of ice margin evolution in Greenland since the glacial maximum, (ii) develop a standardised record of empirical data, and (iii) identify new sites for future field campaigns. Based on these motivations, we here present PaleoGrIS 1.0, a new Greenland-wide isochrone reconstruction of ice sheet extent evolution through the Late Glacial and early-To mid-Holocene informed by both geomorphological and geochronological markers. Our isochrones have a temporal resolution of 500 years and span 1/4 7.5 kyr from approximately 14 to 6.5 kyr BP. We describe the resulting reconstruction of the shrinking ice sheet and conduct a series of ice-sheet-wide and regional analyses to quantify retreat rates, areal extent change, and their variability across space and time. During the Late Glacial and early-To mid-Holocene, we find the Greenland Ice Sheet has lost about one-Third of its areal extent (0.89 million km 2). Between 1/4 14 and 1/4 8.5 kyr BP, it experienced a near-constant rate of areal extent loss of 170 ± 27 km 2 ...
format Article in Journal/Newspaper
author Leger, Tancrède P.M.
Clark, Christopher D.
Huynh, Carla
Jones, Sharman
Ely, Jeremy C.
Bradley, Sarah L.
Diemont, Christiaan
Hughes, Anna L.C.
spellingShingle Leger, Tancrède P.M.
Clark, Christopher D.
Huynh, Carla
Jones, Sharman
Ely, Jeremy C.
Bradley, Sarah L.
Diemont, Christiaan
Hughes, Anna L.C.
A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0
author_facet Leger, Tancrède P.M.
Clark, Christopher D.
Huynh, Carla
Jones, Sharman
Ely, Jeremy C.
Bradley, Sarah L.
Diemont, Christiaan
Hughes, Anna L.C.
author_sort Leger, Tancrède P.M.
title A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0
title_short A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0
title_full A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0
title_fullStr A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0
title_full_unstemmed A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:PaleoGrIS version 1.0
title_sort greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers:paleogris version 1.0
publishDate 2024
url https://research.manchester.ac.uk/en/publications/4ec3ebb3-ce7a-470b-aaaa-c14b3d82c6a6
https://doi.org/10.5194/cp-20-701-2024
http://www.scopus.com/inward/record.url?scp=85188902849&partnerID=8YFLogxK
https://cp.copernicus.org/preprints/cp-2023-60/cp-2023-60.pdf
geographic Greenland
geographic_facet Greenland
genre Greenland
Ice Sheet
genre_facet Greenland
Ice Sheet
op_source Leger , T P M , Clark , C D , Huynh , C , Jones , S , Ely , J C , Bradley , S L , Diemont , C & Hughes , A L C 2024 , ' A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers : PaleoGrIS version 1.0 ' , Climate of the Past , vol. 20 , no. 3 , pp. 701-755 . https://doi.org/10.5194/cp-20-701-2024
op_relation https://research.manchester.ac.uk/en/publications/4ec3ebb3-ce7a-470b-aaaa-c14b3d82c6a6
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.5194/cp-20-701-2024
container_title Climate of the Past
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container_issue 3
container_start_page 701
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