Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings
Numerical simulations of the Greenland Ice Sheet (GrIS) over geologic timescales can greatly improve our knowledge of the critical factors driving GrIS demise during climatically warm periods, which has clear relevance for better predicting GrIS behavior over the upcoming centuries. To assess the fi...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-16-2355-2022 https://noa.gwlb.de/receive/cop_mods_00061562 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061006/tc-16-2355-2022.pdf https://tc.copernicus.org/articles/16/2355/2022/tc-16-2355-2022.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00061562 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00061562 2023-05-15T16:21:24+02:00 Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings Cuzzone, Joshua K. Young, Nicolás E. Morlighem, Mathieu Briner, Jason P. Schlegel, Nicole-Jeanne 2022-06 electronic https://doi.org/10.5194/tc-16-2355-2022 https://noa.gwlb.de/receive/cop_mods_00061562 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061006/tc-16-2355-2022.pdf https://tc.copernicus.org/articles/16/2355/2022/tc-16-2355-2022.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-2355-2022 https://noa.gwlb.de/receive/cop_mods_00061562 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061006/tc-16-2355-2022.pdf https://tc.copernicus.org/articles/16/2355/2022/tc-16-2355-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-2355-2022 2022-06-19T23:11:41Z Numerical simulations of the Greenland Ice Sheet (GrIS) over geologic timescales can greatly improve our knowledge of the critical factors driving GrIS demise during climatically warm periods, which has clear relevance for better predicting GrIS behavior over the upcoming centuries. To assess the fidelity of these modeling efforts, however, observational constraints of past ice sheet change are needed. Across southwestern Greenland, geologic records detail Holocene ice retreat across both terrestrial-based and marine-terminating environments, providing an ideal opportunity to rigorously benchmark model simulations against geologic reconstructions of ice sheet change. Here, we present regional ice sheet modeling results using the Ice-sheet and Sea-level System Model (ISSM) of Holocene ice sheet history across an extensive fjord region in southwestern Greenland covering the landscape around the Kangiata Nunaata Sermia (KNS) glacier and extending outward along the 200 km Nuup Kangerula (Godthåbsfjord). Our simulations, forced by reconstructions of Holocene climate and recently implemented calving laws, assess the sensitivity of ice retreat across the KNS region to atmospheric and oceanic forcing. Our simulations reveal that the geologically reconstructed ice retreat across the terrestrial landscape in the study area was likely driven by fluctuations in surface mass balance in response to Early Holocene warming – and was likely not influenced significantly by the response of adjacent outlet glaciers to calving and ocean-induced melting. The impact of ice calving within fjords, however, plays a significant role by enhancing ice discharge at the terminus, leading to interior thinning up to the ice divide that is consistent with reconstructed magnitudes of Early Holocene ice thinning. Our results, benchmarked against geologic constraints of past ice-margin change, suggest that while calving did not strongly influence Holocene ice-margin migration across terrestrial portions of the KNS forefield, it strongly impacted ... Article in Journal/Newspaper glacier Godthåbsfjord Greenland Ice Sheet The Cryosphere Niedersächsisches Online-Archiv NOA Greenland The Cryosphere 16 6 2355 2372 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Cuzzone, Joshua K. Young, Nicolás E. Morlighem, Mathieu Briner, Jason P. Schlegel, Nicole-Jeanne Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings |
topic_facet |
article Verlagsveröffentlichung |
description |
Numerical simulations of the Greenland Ice Sheet (GrIS) over geologic timescales can greatly improve our knowledge of the critical factors driving GrIS demise during climatically warm periods, which has clear relevance for better predicting GrIS behavior over the upcoming centuries. To assess the fidelity of these modeling efforts, however, observational constraints of past ice sheet change are needed. Across southwestern Greenland, geologic records detail Holocene ice retreat across both terrestrial-based and marine-terminating environments, providing an ideal opportunity to rigorously benchmark model simulations against geologic reconstructions of ice sheet change. Here, we present regional ice sheet modeling results using the Ice-sheet and Sea-level System Model (ISSM) of Holocene ice sheet history across an extensive fjord region in southwestern Greenland covering the landscape around the Kangiata Nunaata Sermia (KNS) glacier and extending outward along the 200 km Nuup Kangerula (Godthåbsfjord). Our simulations, forced by reconstructions of Holocene climate and recently implemented calving laws, assess the sensitivity of ice retreat across the KNS region to atmospheric and oceanic forcing. Our simulations reveal that the geologically reconstructed ice retreat across the terrestrial landscape in the study area was likely driven by fluctuations in surface mass balance in response to Early Holocene warming – and was likely not influenced significantly by the response of adjacent outlet glaciers to calving and ocean-induced melting. The impact of ice calving within fjords, however, plays a significant role by enhancing ice discharge at the terminus, leading to interior thinning up to the ice divide that is consistent with reconstructed magnitudes of Early Holocene ice thinning. Our results, benchmarked against geologic constraints of past ice-margin change, suggest that while calving did not strongly influence Holocene ice-margin migration across terrestrial portions of the KNS forefield, it strongly impacted ... |
format |
Article in Journal/Newspaper |
author |
Cuzzone, Joshua K. Young, Nicolás E. Morlighem, Mathieu Briner, Jason P. Schlegel, Nicole-Jeanne |
author_facet |
Cuzzone, Joshua K. Young, Nicolás E. Morlighem, Mathieu Briner, Jason P. Schlegel, Nicole-Jeanne |
author_sort |
Cuzzone, Joshua K. |
title |
Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings |
title_short |
Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings |
title_full |
Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings |
title_fullStr |
Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings |
title_full_unstemmed |
Simulating the Holocene deglaciation across a marine-terminating portion of southwestern Greenland in response to marine and atmospheric forcings |
title_sort |
simulating the holocene deglaciation across a marine-terminating portion of southwestern greenland in response to marine and atmospheric forcings |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-2355-2022 https://noa.gwlb.de/receive/cop_mods_00061562 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061006/tc-16-2355-2022.pdf https://tc.copernicus.org/articles/16/2355/2022/tc-16-2355-2022.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Godthåbsfjord Greenland Ice Sheet The Cryosphere |
genre_facet |
glacier Godthåbsfjord Greenland Ice Sheet The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-2355-2022 https://noa.gwlb.de/receive/cop_mods_00061562 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061006/tc-16-2355-2022.pdf https://tc.copernicus.org/articles/16/2355/2022/tc-16-2355-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-2355-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
6 |
container_start_page |
2355 |
op_container_end_page |
2372 |
_version_ |
1766009399023763456 |