Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing
Millennial-scale variability associated with Dansgaard–Oeschger events is arguably one of the most puzzling climate phenomena ever discovered in paleoclimate archives. Here, we set out to elucidate the underlying dynamics by conducting a transient global hindcast simulation with a 3-D intermediate c...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00020726 2023-05-15T16:00:01+02:00 Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing Menviel, L. Timmermann, A. Friedrich, T. England, M. H. 2014-01 electronic https://doi.org/10.5194/cp-10-63-2014 https://noa.gwlb.de/receive/cop_mods_00020726 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020681/cp-10-63-2014.pdf https://cp.copernicus.org/articles/10/63/2014/cp-10-63-2014.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-10-63-2014 https://noa.gwlb.de/receive/cop_mods_00020726 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020681/cp-10-63-2014.pdf https://cp.copernicus.org/articles/10/63/2014/cp-10-63-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/cp-10-63-2014 2022-02-08T22:52:00Z Millennial-scale variability associated with Dansgaard–Oeschger events is arguably one of the most puzzling climate phenomena ever discovered in paleoclimate archives. Here, we set out to elucidate the underlying dynamics by conducting a transient global hindcast simulation with a 3-D intermediate complexity earth system model covering the period 50 to 30 ka BP. The model is forced by time-varying external boundary conditions (greenhouse gases, orbital forcing, and ice-sheet orography and albedo) and anomalous North Atlantic freshwater fluxes, which mimic the effects of changing northern hemispheric ice volume on millennial timescales. Together these forcings generate a realistic global climate trajectory, as demonstrated by an extensive model/paleo data comparison. Our results are consistent with the idea that variations in ice-sheet calving and subsequent changes of the Atlantic Meridional Overturning Circulation were the main drivers for the continuum of glacial millennial-scale variability seen in paleorecords across the globe. Article in Journal/Newspaper Dansgaard-Oeschger events Ice Sheet North Atlantic Niedersächsisches Online-Archiv NOA Climate of the Past 10 1 63 77 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Menviel, L. Timmermann, A. Friedrich, T. England, M. H. Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing |
topic_facet |
article Verlagsveröffentlichung |
description |
Millennial-scale variability associated with Dansgaard–Oeschger events is arguably one of the most puzzling climate phenomena ever discovered in paleoclimate archives. Here, we set out to elucidate the underlying dynamics by conducting a transient global hindcast simulation with a 3-D intermediate complexity earth system model covering the period 50 to 30 ka BP. The model is forced by time-varying external boundary conditions (greenhouse gases, orbital forcing, and ice-sheet orography and albedo) and anomalous North Atlantic freshwater fluxes, which mimic the effects of changing northern hemispheric ice volume on millennial timescales. Together these forcings generate a realistic global climate trajectory, as demonstrated by an extensive model/paleo data comparison. Our results are consistent with the idea that variations in ice-sheet calving and subsequent changes of the Atlantic Meridional Overturning Circulation were the main drivers for the continuum of glacial millennial-scale variability seen in paleorecords across the globe. |
format |
Article in Journal/Newspaper |
author |
Menviel, L. Timmermann, A. Friedrich, T. England, M. H. |
author_facet |
Menviel, L. Timmermann, A. Friedrich, T. England, M. H. |
author_sort |
Menviel, L. |
title |
Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing |
title_short |
Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing |
title_full |
Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing |
title_fullStr |
Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing |
title_full_unstemmed |
Hindcasting the continuum of Dansgaard–Oeschger variability: mechanisms, patterns and timing |
title_sort |
hindcasting the continuum of dansgaard–oeschger variability: mechanisms, patterns and timing |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/cp-10-63-2014 https://noa.gwlb.de/receive/cop_mods_00020726 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020681/cp-10-63-2014.pdf https://cp.copernicus.org/articles/10/63/2014/cp-10-63-2014.pdf |
genre |
Dansgaard-Oeschger events Ice Sheet North Atlantic |
genre_facet |
Dansgaard-Oeschger events Ice Sheet North Atlantic |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-10-63-2014 https://noa.gwlb.de/receive/cop_mods_00020726 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020681/cp-10-63-2014.pdf https://cp.copernicus.org/articles/10/63/2014/cp-10-63-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-10-63-2014 |
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Climate of the Past |
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