Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record
The evolution and dynamics of the last British-Irish Ice Sheet (BIIS) have hitherto largely been reconstructed from onshore and shallow marine glacial geological and geomorphological data. This reconstruction has been problematic because these sequences and data are spatially and temporally incomple...
Published in: | Quaternary Science Reviews |
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2009
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/growth-dynamics-and-deglaciation-of-the-last-britishirish-ice-sheet(b7e915f0-1237-426a-a487-228a7f0f6f60).html https://doi.org/10.1016/j.quascirev.2009.08.009 http://www.scopus.com/inward/record.url?scp=70450269230&partnerID=8YFLogxK |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/b7e915f0-1237-426a-a487-228a7f0f6f60 2024-09-15T18:10:10+00:00 Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record Scourse, James D. Haapaniemi, Anna I. Colmenero-Hidalgo, Elena Peck, Victoria L. Hall, Ian R. Austin, William Knutz, Paul C. Zahn, Rainer 2009-12 https://research-portal.st-andrews.ac.uk/en/researchoutput/growth-dynamics-and-deglaciation-of-the-last-britishirish-ice-sheet(b7e915f0-1237-426a-a487-228a7f0f6f60).html https://doi.org/10.1016/j.quascirev.2009.08.009 http://www.scopus.com/inward/record.url?scp=70450269230&partnerID=8YFLogxK eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/growth-dynamics-and-deglaciation-of-the-last-britishirish-ice-sheet(b7e915f0-1237-426a-a487-228a7f0f6f60).html info:eu-repo/semantics/restrictedAccess Scourse , J D , Haapaniemi , A I , Colmenero-Hidalgo , E , Peck , V L , Hall , I R , Austin , W , Knutz , P C & Zahn , R 2009 , ' Growth, dynamics and deglaciation of the last British-Irish ice sheet : the deep-sea ice-rafted detritus record ' , Quaternary Science Reviews , vol. 28 , no. 27-28 , pp. 3066-3084 . https://doi.org/10.1016/j.quascirev.2009.08.009 NORTH-ATLANTIC OCEAN EUROPEAN CONTINENTAL-MARGIN BOTTOM-CURRENT PATHWAYS ABRUPT CLIMATIC-CHANGE HEINRICH EVENTS GLACIAL MAXIMUM NORTHEASTERN ATLANTIC BARRA-FAN RADIOCARBON CONSTRAINTS QUATERNARY GLACIATIONS article 2009 ftunstandrewcris https://doi.org/10.1016/j.quascirev.2009.08.009 2024-07-03T23:33:43Z The evolution and dynamics of the last British-Irish Ice Sheet (BIIS) have hitherto largely been reconstructed from onshore and shallow marine glacial geological and geomorphological data. This reconstruction has been problematic because these sequences and data are spatially and temporally incomplete and fragmentary. In order to enhance BIIS reconstruction, we present a compilation of new and previously published ice-rafted detritus (IRD) flux and concentration data from high-resolution sediment cores recovered from the NE Atlantic deep-sea continental slope adjacent to the last BIIS. These cores are situated adjacent to the full latitudinal extent of the last BIIS and cover Marine Isotope Stages (MIS) 2 and 3. Age models are based on radiocarbon dating and graphical tuning of abundances of the polar planktonic foraminifera Neogloboquadrina pachyderma sinistral (% Nps) to the Greenland GISP2 ice core record. Multiple IRD fingerprinting techniques indicate that, at the selected locations, most IRD are sourced from adjacent MIS ice streams except in the centre of Heinrich (H) layers in which IRD shows a prominent Laurentide Ice Sheet provenance. IRD flux data are interpreted with reference to a conceptual model explaining the relations between flux, North Atlantic hydrography and ice dynamics. Both positive and rapid negative mass balance can cause increases, and prominent peaks, in IRD flux. First-order interpretation of the IRD record indicates the timing of the presence of the MIS with an actively calving marine margin. The records show a coherent latitudinal, but partly phased, signal during MIS 3 and 2. Published data indicate that the last MIS initiated during the MIS 514 cooling transition; renewed growth just before H5 (46 ka) was succeeded by very strong millennial-scale variability apparently corresponding with Dansgaard-Oeschger (DO) cycles closely coupled to millennial-scale climate variability in the North Atlantic region involving latitudinal migration of the North Atlantic Polar Front. This ... Article in Journal/Newspaper Greenland ice core Ice Sheet Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice University of St Andrews: Research Portal Quaternary Science Reviews 28 27-28 3066 3084 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
NORTH-ATLANTIC OCEAN EUROPEAN CONTINENTAL-MARGIN BOTTOM-CURRENT PATHWAYS ABRUPT CLIMATIC-CHANGE HEINRICH EVENTS GLACIAL MAXIMUM NORTHEASTERN ATLANTIC BARRA-FAN RADIOCARBON CONSTRAINTS QUATERNARY GLACIATIONS |
spellingShingle |
NORTH-ATLANTIC OCEAN EUROPEAN CONTINENTAL-MARGIN BOTTOM-CURRENT PATHWAYS ABRUPT CLIMATIC-CHANGE HEINRICH EVENTS GLACIAL MAXIMUM NORTHEASTERN ATLANTIC BARRA-FAN RADIOCARBON CONSTRAINTS QUATERNARY GLACIATIONS Scourse, James D. Haapaniemi, Anna I. Colmenero-Hidalgo, Elena Peck, Victoria L. Hall, Ian R. Austin, William Knutz, Paul C. Zahn, Rainer Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record |
topic_facet |
NORTH-ATLANTIC OCEAN EUROPEAN CONTINENTAL-MARGIN BOTTOM-CURRENT PATHWAYS ABRUPT CLIMATIC-CHANGE HEINRICH EVENTS GLACIAL MAXIMUM NORTHEASTERN ATLANTIC BARRA-FAN RADIOCARBON CONSTRAINTS QUATERNARY GLACIATIONS |
description |
The evolution and dynamics of the last British-Irish Ice Sheet (BIIS) have hitherto largely been reconstructed from onshore and shallow marine glacial geological and geomorphological data. This reconstruction has been problematic because these sequences and data are spatially and temporally incomplete and fragmentary. In order to enhance BIIS reconstruction, we present a compilation of new and previously published ice-rafted detritus (IRD) flux and concentration data from high-resolution sediment cores recovered from the NE Atlantic deep-sea continental slope adjacent to the last BIIS. These cores are situated adjacent to the full latitudinal extent of the last BIIS and cover Marine Isotope Stages (MIS) 2 and 3. Age models are based on radiocarbon dating and graphical tuning of abundances of the polar planktonic foraminifera Neogloboquadrina pachyderma sinistral (% Nps) to the Greenland GISP2 ice core record. Multiple IRD fingerprinting techniques indicate that, at the selected locations, most IRD are sourced from adjacent MIS ice streams except in the centre of Heinrich (H) layers in which IRD shows a prominent Laurentide Ice Sheet provenance. IRD flux data are interpreted with reference to a conceptual model explaining the relations between flux, North Atlantic hydrography and ice dynamics. Both positive and rapid negative mass balance can cause increases, and prominent peaks, in IRD flux. First-order interpretation of the IRD record indicates the timing of the presence of the MIS with an actively calving marine margin. The records show a coherent latitudinal, but partly phased, signal during MIS 3 and 2. Published data indicate that the last MIS initiated during the MIS 514 cooling transition; renewed growth just before H5 (46 ka) was succeeded by very strong millennial-scale variability apparently corresponding with Dansgaard-Oeschger (DO) cycles closely coupled to millennial-scale climate variability in the North Atlantic region involving latitudinal migration of the North Atlantic Polar Front. This ... |
format |
Article in Journal/Newspaper |
author |
Scourse, James D. Haapaniemi, Anna I. Colmenero-Hidalgo, Elena Peck, Victoria L. Hall, Ian R. Austin, William Knutz, Paul C. Zahn, Rainer |
author_facet |
Scourse, James D. Haapaniemi, Anna I. Colmenero-Hidalgo, Elena Peck, Victoria L. Hall, Ian R. Austin, William Knutz, Paul C. Zahn, Rainer |
author_sort |
Scourse, James D. |
title |
Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record |
title_short |
Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record |
title_full |
Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record |
title_fullStr |
Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record |
title_full_unstemmed |
Growth, dynamics and deglaciation of the last British-Irish ice sheet:the deep-sea ice-rafted detritus record |
title_sort |
growth, dynamics and deglaciation of the last british-irish ice sheet:the deep-sea ice-rafted detritus record |
publishDate |
2009 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/growth-dynamics-and-deglaciation-of-the-last-britishirish-ice-sheet(b7e915f0-1237-426a-a487-228a7f0f6f60).html https://doi.org/10.1016/j.quascirev.2009.08.009 http://www.scopus.com/inward/record.url?scp=70450269230&partnerID=8YFLogxK |
genre |
Greenland ice core Ice Sheet Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice |
genre_facet |
Greenland ice core Ice Sheet Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice |
op_source |
Scourse , J D , Haapaniemi , A I , Colmenero-Hidalgo , E , Peck , V L , Hall , I R , Austin , W , Knutz , P C & Zahn , R 2009 , ' Growth, dynamics and deglaciation of the last British-Irish ice sheet : the deep-sea ice-rafted detritus record ' , Quaternary Science Reviews , vol. 28 , no. 27-28 , pp. 3066-3084 . https://doi.org/10.1016/j.quascirev.2009.08.009 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/growth-dynamics-and-deglaciation-of-the-last-britishirish-ice-sheet(b7e915f0-1237-426a-a487-228a7f0f6f60).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.08.009 |
container_title |
Quaternary Science Reviews |
container_volume |
28 |
container_issue |
27-28 |
container_start_page |
3066 |
op_container_end_page |
3084 |
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