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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Format: | Article in Journal/Newspaper |
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Elsevier
2009
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Online Access: | http://nora.nerc.ac.uk/id/eprint/11204/ http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6VBC-4X962YX-2-T&_cdi=5923&_user=1773399&_pii=S0277379109002753&_orig=browse&_coverDate=12%2F31%2F2009&_sk=999719972&view=c&wchp=dGLbVlb-zSkWA&md5=f8de9ca60bc174842253f8fe4fc0b59c&ie=/sdarticle.pdf |
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ftnerc:oai:nora.nerc.ac.uk:11204 2023-05-15T16:30:15+02:00 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 E.N. Knutz, Paul C. Zahn, Rainer 2009 http://nora.nerc.ac.uk/id/eprint/11204/ http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6VBC-4X962YX-2-T&_cdi=5923&_user=1773399&_pii=S0277379109002753&_orig=browse&_coverDate=12%2F31%2F2009&_sk=999719972&view=c&wchp=dGLbVlb-zSkWA&md5=f8de9ca60bc174842253f8fe4fc0b59c&ie=/sdarticle.pdf unknown Elsevier Scourse, James D.; Haapaniemi, Anna I.; Colmenero-Hidalgo, Elena; Peck, Victoria L. orcid:0000-0002-7948-6853 Hall, Ian R.; Austin, William E.N.; Knutz, Paul C.; Zahn, Rainer. 2009 Growth, dynamics and deglaciation of the last British-Irish ice sheet: the deep-sea ice-rafted detritus record. Quaternary Science Reviews, 28 (27-28). 3066-3084. https://doi.org/10.1016/j.quascirev.2009.08.009 <https://doi.org/10.1016/j.quascirev.2009.08.009> Glaciology Earth Sciences Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1016/j.quascirev.2009.08.009 2023-02-04T19:27:12Z 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 Natural Environment Research Council: NERC Open Research Archive Greenland Quaternary Science Reviews 28 27-28 3066 3084 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Glaciology Earth Sciences |
spellingShingle |
Glaciology Earth Sciences Scourse, James D. Haapaniemi, Anna I. Colmenero-Hidalgo, Elena Peck, Victoria L. Hall, Ian R. Austin, William E.N. 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 |
Glaciology Earth Sciences |
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 E.N. Knutz, Paul C. Zahn, Rainer |
author_facet |
Scourse, James D. Haapaniemi, Anna I. Colmenero-Hidalgo, Elena Peck, Victoria L. Hall, Ian R. Austin, William E.N. 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 |
publisher |
Elsevier |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/11204/ http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6VBC-4X962YX-2-T&_cdi=5923&_user=1773399&_pii=S0277379109002753&_orig=browse&_coverDate=12%2F31%2F2009&_sk=999719972&view=c&wchp=dGLbVlb-zSkWA&md5=f8de9ca60bc174842253f8fe4fc0b59c&ie=/sdarticle.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
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_relation |
Scourse, James D.; Haapaniemi, Anna I.; Colmenero-Hidalgo, Elena; Peck, Victoria L. orcid:0000-0002-7948-6853 Hall, Ian R.; Austin, William E.N.; Knutz, Paul C.; Zahn, Rainer. 2009 Growth, dynamics and deglaciation of the last British-Irish ice sheet: the deep-sea ice-rafted detritus record. Quaternary Science Reviews, 28 (27-28). 3066-3084. https://doi.org/10.1016/j.quascirev.2009.08.009 <https://doi.org/10.1016/j.quascirev.2009.08.009> |
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 |
_version_ |
1766019964546842624 |