Mechanisms for millennial-scale global synchronization during the last glacial period

Global climate during the last glacial period was punctuated by abrupt warmings and occasional pulses of freshwater into the North Atlantic that disrupted deepwater production. These massive freshwater pulses known as Heinrich events arose, in part, from instabilities within the Laurentide ice sheet...

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Published in:Paleoceanography
Main Authors: Timmermann, A., Krebs, U, Justino, F, Goosse, Hugues, Ivanochko, T
Other Authors: UCL, UCL - SST/ELI/ELIC - Earth & Climate
Format: Article in Journal/Newspaper
Language:English
Published: Amer Geophysical Union 2005
Subjects:
Online Access:http://hdl.handle.net/2078.1/38996
https://doi.org/10.1029/2004PA001090
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spelling ftunistlouisbrus:oai:dial.uclouvain.be:boreal:38996 2024-05-12T08:05:21+00:00 Mechanisms for millennial-scale global synchronization during the last glacial period Timmermann, A. Krebs, U Justino, F Goosse, Hugues Ivanochko, T UCL UCL - SST/ELI/ELIC - Earth & Climate 2005 http://hdl.handle.net/2078.1/38996 https://doi.org/10.1029/2004PA001090 eng eng Amer Geophysical Union boreal:38996 http://hdl.handle.net/2078.1/38996 doi:10.1029/2004PA001090 urn:ISSN:0883-8305 urn:EISSN:1944-9186 Paleoceanography, Vol. 20, no. 4 (2005) info:eu-repo/semantics/article 2005 ftunistlouisbrus https://doi.org/10.1029/2004PA001090 2024-04-18T18:15:11Z Global climate during the last glacial period was punctuated by abrupt warmings and occasional pulses of freshwater into the North Atlantic that disrupted deepwater production. These massive freshwater pulses known as Heinrich events arose, in part, from instabilities within the Laurentide ice sheet. Paleoevidence from the North Atlantic suggests that these events altered the production of deep water and changed downstream climate throughout the Northern Hemisphere. In the tropical western Pacific sea, surface temperatures and salinity varied together with ocean and climate changes at high latitudes. Here we present results from coupled modeling experiments that shed light on a possible dynamical link between the North Atlantic Ocean and the western tropical Pacific. This link involves a global oceanic standing wave pattern brought about by millennial-scale glacial density variations in the North Atlantic, atmospheric teleconnections triggered by meridional sea surface temperature gradients, and local air-sea interactions. Furthermore, our modeling results are compared with hydrological records from the Cariaco basin, the Indian Ocean, the Sulu Sea, and northern Australia. Article in Journal/Newspaper Ice Sheet North Atlantic DIAL@USL-B (Université Saint-Louis, Bruxelles) Pacific Indian Paleoceanography 20 4 n/a n/a
institution Open Polar
collection DIAL@USL-B (Université Saint-Louis, Bruxelles)
op_collection_id ftunistlouisbrus
language English
description Global climate during the last glacial period was punctuated by abrupt warmings and occasional pulses of freshwater into the North Atlantic that disrupted deepwater production. These massive freshwater pulses known as Heinrich events arose, in part, from instabilities within the Laurentide ice sheet. Paleoevidence from the North Atlantic suggests that these events altered the production of deep water and changed downstream climate throughout the Northern Hemisphere. In the tropical western Pacific sea, surface temperatures and salinity varied together with ocean and climate changes at high latitudes. Here we present results from coupled modeling experiments that shed light on a possible dynamical link between the North Atlantic Ocean and the western tropical Pacific. This link involves a global oceanic standing wave pattern brought about by millennial-scale glacial density variations in the North Atlantic, atmospheric teleconnections triggered by meridional sea surface temperature gradients, and local air-sea interactions. Furthermore, our modeling results are compared with hydrological records from the Cariaco basin, the Indian Ocean, the Sulu Sea, and northern Australia.
author2 UCL
UCL - SST/ELI/ELIC - Earth & Climate
format Article in Journal/Newspaper
author Timmermann, A.
Krebs, U
Justino, F
Goosse, Hugues
Ivanochko, T
spellingShingle Timmermann, A.
Krebs, U
Justino, F
Goosse, Hugues
Ivanochko, T
Mechanisms for millennial-scale global synchronization during the last glacial period
author_facet Timmermann, A.
Krebs, U
Justino, F
Goosse, Hugues
Ivanochko, T
author_sort Timmermann, A.
title Mechanisms for millennial-scale global synchronization during the last glacial period
title_short Mechanisms for millennial-scale global synchronization during the last glacial period
title_full Mechanisms for millennial-scale global synchronization during the last glacial period
title_fullStr Mechanisms for millennial-scale global synchronization during the last glacial period
title_full_unstemmed Mechanisms for millennial-scale global synchronization during the last glacial period
title_sort mechanisms for millennial-scale global synchronization during the last glacial period
publisher Amer Geophysical Union
publishDate 2005
url http://hdl.handle.net/2078.1/38996
https://doi.org/10.1029/2004PA001090
geographic Pacific
Indian
geographic_facet Pacific
Indian
genre Ice Sheet
North Atlantic
genre_facet Ice Sheet
North Atlantic
op_source Paleoceanography, Vol. 20, no. 4 (2005)
op_relation boreal:38996
http://hdl.handle.net/2078.1/38996
doi:10.1029/2004PA001090
urn:ISSN:0883-8305
urn:EISSN:1944-9186
op_doi https://doi.org/10.1029/2004PA001090
container_title Paleoceanography
container_volume 20
container_issue 4
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