Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks
We present transient simulations of the last glacial inception using the Earth system model CLIMBER-X with dynamic vegetation, interactive ice sheets and visco-elastic solid-Earth response. The simulations are initialized at the middle of the Eemian interglacial (125 kiloyears before present, ka) an...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00067558 2023-07-30T04:04:10+02:00 Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks Willeit, Matteo Calov, Reinhard Talento, Stefanie Greve, Ralf Bernales, Jorjo Klemann, Volker Bagge, Meike Ganopolski, Andrey 2023-07 electronic https://doi.org/10.5194/egusphere-2023-1462 https://noa.gwlb.de/receive/cop_mods_00067558 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066011/egusphere-2023-1462.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1462/egusphere-2023-1462.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-1462 https://noa.gwlb.de/receive/cop_mods_00067558 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066011/egusphere-2023-1462.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1462/egusphere-2023-1462.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-1462 2023-07-09T23:19:02Z We present transient simulations of the last glacial inception using the Earth system model CLIMBER-X with dynamic vegetation, interactive ice sheets and visco-elastic solid-Earth response. The simulations are initialized at the middle of the Eemian interglacial (125 kiloyears before present, ka) and run until 100 ka, driven by prescribed changes in Earth’s orbital parameters and greenhouse gas concentrations from ice core data. CLIMBER-X simulates a rapid increase in Northern Hemisphere ice sheet area through MIS5d, with ice sheets expanding over northern North America and Scandinavia, in broad agreement with proxy reconstructions. While most of the increase in ice sheet area occurs over a relatively short period between 119 ka and 117 ka, the larger part of the increase in ice volume occurs afterwards with an almost constant ice sheet extent. We show that the vegetation feedback plays a fundamental role in controlling the ice sheet expansion during the last glacial inception. In particular, with prescribed present-day vegetation the model simulates a global sea level drop of only ∼20 m, compared with the ∼35 m decrease in sea level with dynamic vegetation response. The ice sheet and carbon-cycle feedbacks play only a minor role during the ice sheet expansion phase prior to ∼115 ka, but are important in limiting the deglaciation during the following phase characterized by increasing summer insolation. The model results are sensitive to climate model biases and to the parameterisation of snow albedo, while they show only a weak dependence on changes in the ice sheet model resolution and the acceleration factor used to speed up the climate component. Overall, our simulations confirm and refine previous results showing that climate-vegetation-cryosphere-carbon cycle feedbacks play a fundamental role in the transition from interglacial to glacial states characterising Quaternary glacial cycles. Article in Journal/Newspaper ice core Ice Sheet Niedersächsisches Online-Archiv NOA |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Willeit, Matteo Calov, Reinhard Talento, Stefanie Greve, Ralf Bernales, Jorjo Klemann, Volker Bagge, Meike Ganopolski, Andrey Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks |
topic_facet |
article Verlagsveröffentlichung |
description |
We present transient simulations of the last glacial inception using the Earth system model CLIMBER-X with dynamic vegetation, interactive ice sheets and visco-elastic solid-Earth response. The simulations are initialized at the middle of the Eemian interglacial (125 kiloyears before present, ka) and run until 100 ka, driven by prescribed changes in Earth’s orbital parameters and greenhouse gas concentrations from ice core data. CLIMBER-X simulates a rapid increase in Northern Hemisphere ice sheet area through MIS5d, with ice sheets expanding over northern North America and Scandinavia, in broad agreement with proxy reconstructions. While most of the increase in ice sheet area occurs over a relatively short period between 119 ka and 117 ka, the larger part of the increase in ice volume occurs afterwards with an almost constant ice sheet extent. We show that the vegetation feedback plays a fundamental role in controlling the ice sheet expansion during the last glacial inception. In particular, with prescribed present-day vegetation the model simulates a global sea level drop of only ∼20 m, compared with the ∼35 m decrease in sea level with dynamic vegetation response. The ice sheet and carbon-cycle feedbacks play only a minor role during the ice sheet expansion phase prior to ∼115 ka, but are important in limiting the deglaciation during the following phase characterized by increasing summer insolation. The model results are sensitive to climate model biases and to the parameterisation of snow albedo, while they show only a weak dependence on changes in the ice sheet model resolution and the acceleration factor used to speed up the climate component. Overall, our simulations confirm and refine previous results showing that climate-vegetation-cryosphere-carbon cycle feedbacks play a fundamental role in the transition from interglacial to glacial states characterising Quaternary glacial cycles. |
format |
Article in Journal/Newspaper |
author |
Willeit, Matteo Calov, Reinhard Talento, Stefanie Greve, Ralf Bernales, Jorjo Klemann, Volker Bagge, Meike Ganopolski, Andrey |
author_facet |
Willeit, Matteo Calov, Reinhard Talento, Stefanie Greve, Ralf Bernales, Jorjo Klemann, Volker Bagge, Meike Ganopolski, Andrey |
author_sort |
Willeit, Matteo |
title |
Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks |
title_short |
Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks |
title_full |
Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks |
title_fullStr |
Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks |
title_full_unstemmed |
Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks |
title_sort |
glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-1462 https://noa.gwlb.de/receive/cop_mods_00067558 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066011/egusphere-2023-1462.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1462/egusphere-2023-1462.pdf |
genre |
ice core Ice Sheet |
genre_facet |
ice core Ice Sheet |
op_relation |
https://doi.org/10.5194/egusphere-2023-1462 https://noa.gwlb.de/receive/cop_mods_00067558 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066011/egusphere-2023-1462.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1462/egusphere-2023-1462.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-1462 |
_version_ |
1772815379105579008 |