Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation

A multiproxy paleoceanographic record from the Atlantic margin off the British Isles reveals in unprecedented detail discharges of icebergs and meltwater in response to sea surface temperature increases across the last deglaciation. We observe the earliest signal of deglaciation as a moderate elevat...

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Authors: Knutz, Paul C., Hall, Ian R., Zahn, Rainer, Rasmussen, Tine L., Kuijpers, Antoon, Moros, Matthias, Shackleton, Nick J.
Format: article
Publication Date:2002
Country:España
Institution:Universitat Autònoma de Barcelona
Repository:Dipòsit Digital de Documents de la UAB
Language:English
OAI Identifier:oai:ddd.uab.cat:181778
Online Access:https://ddd.uab.cat/record/181778
https://dx.doi.org/urn:doi:10.1029/2002GC000351
Access Level:Open access
Keyword:Last deglaciation
Ice rafted debris
Stable isotopes
Meltwater
North East Atlantic
Thermohaline circulation
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spelling Multidecadal ocean variability and NW European ice sheet surges during the last deglaciationKnutz, Paul C.Hall, Ian R.Zahn, RainerRasmussen, Tine L.Kuijpers, AntoonMoros, MatthiasShackleton, Nick J.Last deglaciationIce rafted debrisStable isotopesMeltwaterNorth East AtlanticThermohaline circulationA multiproxy paleoceanographic record from the Atlantic margin off the British Isles reveals in unprecedented detail discharges of icebergs and meltwater in response to sea surface temperature increases across the last deglaciation. We observe the earliest signal of deglaciation as a moderate elevation of sea surface temperatures that commenced with a weakly developed thermocline and the presence of highly ventilated intermediate waters in the Rockall Trough. This warming pulse triggered a series of multidecadal ice-rafted debris peaks that culminated with a major meltwater discharge at 17,500 years before present related to ice sheet disintegration across the NW European region. The impact of meltwater caused a progressive reduction in deep water ventilation and a sea surface cooling phase that preceded the collapse of the Laurentide Ice Sheet during Heinrich event 1 by 500-1000 years. A similar sequence of rapid ocean-ice sheet interaction across the European continental margin is identified during the Bølling-Allerød to Younger Dryas transition. The strategic location of our sediment core suggests a sensitive and rapid response of ice sheets in NW Europe to transient increases in thermohaline heat transport. 22002-01-0120022002-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/181778https://dx.doi.org/urn:doi:10.1029/2002GC000351reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:1817782026-06-06T12:50:31Z
dc.title.none.fl_str_mv Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
title Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
spellingShingle Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
Knutz, Paul C.
Last deglaciation
Ice rafted debris
Stable isotopes
Meltwater
North East Atlantic
Thermohaline circulation
title_short Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
title_full Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
title_fullStr Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
title_full_unstemmed Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
title_sort Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation
dc.creator.none.fl_str_mv Knutz, Paul C.
Hall, Ian R.
Zahn, Rainer
Rasmussen, Tine L.
Kuijpers, Antoon
Moros, Matthias
Shackleton, Nick J.
author Knutz, Paul C.
author_facet Knutz, Paul C.
Hall, Ian R.
Zahn, Rainer
Rasmussen, Tine L.
Kuijpers, Antoon
Moros, Matthias
Shackleton, Nick J.
author_role author
author2 Hall, Ian R.
Zahn, Rainer
Rasmussen, Tine L.
Kuijpers, Antoon
Moros, Matthias
Shackleton, Nick J.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Last deglaciation
Ice rafted debris
Stable isotopes
Meltwater
North East Atlantic
Thermohaline circulation
topic Last deglaciation
Ice rafted debris
Stable isotopes
Meltwater
North East Atlantic
Thermohaline circulation
description A multiproxy paleoceanographic record from the Atlantic margin off the British Isles reveals in unprecedented detail discharges of icebergs and meltwater in response to sea surface temperature increases across the last deglaciation. We observe the earliest signal of deglaciation as a moderate elevation of sea surface temperatures that commenced with a weakly developed thermocline and the presence of highly ventilated intermediate waters in the Rockall Trough. This warming pulse triggered a series of multidecadal ice-rafted debris peaks that culminated with a major meltwater discharge at 17,500 years before present related to ice sheet disintegration across the NW European region. The impact of meltwater caused a progressive reduction in deep water ventilation and a sea surface cooling phase that preceded the collapse of the Laurentide Ice Sheet during Heinrich event 1 by 500-1000 years. A similar sequence of rapid ocean-ice sheet interaction across the European continental margin is identified during the Bølling-Allerød to Younger Dryas transition. The strategic location of our sediment core suggests a sensitive and rapid response of ice sheets in NW Europe to transient increases in thermohaline heat transport.
publishDate 2002
dc.date.none.fl_str_mv 2
2002-01-01
2002
2002-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/181778
https://dx.doi.org/urn:doi:10.1029/2002GC000351
url https://ddd.uab.cat/record/181778
https://dx.doi.org/urn:doi:10.1029/2002GC000351
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
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