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...
Published in: | Geochemistry, Geophysics, Geosystems |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2002
|
Subjects: | |
Online Access: | https://ddd.uab.cat/record/181778 |
id |
ftuabarcelonapb:oai:ddd.uab.cat:181778 |
---|---|
record_format |
openpolar |
spelling |
ftuabarcelonapb:oai:ddd.uab.cat:181778 2023-05-15T16:40:03+02:00 Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation Knutz, Paul C. Hall, Ian R. Zahn, Rainer Rasmussen, Tine L. Kuijpers, Antoon Moros, Matthias Shackleton, Nick J. 2002 application/pdf https://ddd.uab.cat/record/181778 eng eng Geochemistry, geophysics, geosystems Vol. 3, issue 12 (Dec. 2002), p. 1-9 https://ddd.uab.cat/record/181778 urn:10.1029/2002GC000351 urn:oai:ddd.uab.cat:181778 urn:recercauab:ARE-41957 urn:wos_id:000179897000005 urn:oai:egreta.uab.cat:publications/60847437-3022-486a-b0fe-85924dcd7272 urn:scopus_id:84861880544 open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Last deglaciation Ice rafted debris Stable isotopes Meltwater North East Atlantic Thermohaline circulation Article 2002 ftuabarcelonapb 2023-02-06T21:12:04Z 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. Article in Journal/Newspaper Ice Sheet North East Atlantic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Geochemistry, Geophysics, Geosystems 3 12 1 9 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Last deglaciation Ice rafted debris Stable isotopes Meltwater North East Atlantic Thermohaline circulation |
spellingShingle |
Last deglaciation Ice rafted debris Stable isotopes Meltwater North East Atlantic Thermohaline circulation Knutz, Paul C. Hall, Ian R. Zahn, Rainer Rasmussen, Tine L. Kuijpers, Antoon Moros, Matthias Shackleton, Nick J. Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation |
topic_facet |
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. |
format |
Article in Journal/Newspaper |
author |
Knutz, Paul C. Hall, Ian R. Zahn, Rainer Rasmussen, Tine L. Kuijpers, Antoon Moros, Matthias Shackleton, Nick J. |
author_facet |
Knutz, Paul C. Hall, Ian R. Zahn, Rainer Rasmussen, Tine L. Kuijpers, Antoon Moros, Matthias Shackleton, Nick J. |
author_sort |
Knutz, Paul C. |
title |
Multidecadal ocean variability and NW European ice sheet surges during the last deglaciation |
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 |
publishDate |
2002 |
url |
https://ddd.uab.cat/record/181778 |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Rockall Trough |
geographic_facet |
Rockall Trough |
genre |
Ice Sheet North East Atlantic |
genre_facet |
Ice Sheet North East Atlantic |
op_relation |
Geochemistry, geophysics, geosystems Vol. 3, issue 12 (Dec. 2002), p. 1-9 https://ddd.uab.cat/record/181778 urn:10.1029/2002GC000351 urn:oai:ddd.uab.cat:181778 urn:recercauab:ARE-41957 urn:wos_id:000179897000005 urn:oai:egreta.uab.cat:publications/60847437-3022-486a-b0fe-85924dcd7272 urn:scopus_id:84861880544 |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
3 |
container_issue |
12 |
container_start_page |
1 |
op_container_end_page |
9 |
_version_ |
1766030400941981696 |