Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet
The British and Irish Ice Sheet (BIIS) was highly dynamic during the Late Quaternary, with considerable regional differences in the timing and extent of its change. This was reflected in equally variable offshore ice‐rafted debris (IRD) records. Here we reconcile these two records using the FRUGAL i...
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ftarchimer:oai:archimer.ifremer.fr:79424 2023-05-15T16:40:09+02:00 Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet Wilton, David J. Bigg, Grant R. Scourse, James D. Ely, Jeremy C. Clark, Chris D. 2021-07 application/pdf https://archimer.ifremer.fr/doc/00682/79424/82009.pdf https://archimer.ifremer.fr/doc/00682/79424/82010.pdf https://doi.org/10.1002/jqs.3273 https://archimer.ifremer.fr/doc/00682/79424/ eng eng Wiley https://archimer.ifremer.fr/doc/00682/79424/82009.pdf https://archimer.ifremer.fr/doc/00682/79424/82010.pdf doi:10.1002/jqs.3273 https://archimer.ifremer.fr/doc/00682/79424/ info:eu-repo/semantics/openAccess restricted use Journal Of Quaternary Science (0267-8179) (Wiley), 2021-07 , Vol. 36 , N. 5 , P. 934-945 British and Irish Ice Sheet coupled model deglaciation Heinrich event ice-rafted debris text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.1002/jqs.3273 2021-10-05T22:48:30Z The British and Irish Ice Sheet (BIIS) was highly dynamic during the Late Quaternary, with considerable regional differences in the timing and extent of its change. This was reflected in equally variable offshore ice‐rafted debris (IRD) records. Here we reconcile these two records using the FRUGAL intermediate complexity iceberg–climate model, with varying BIIS catchment‐level iceberg fluxes, to simulate change in IRD origin and magnitude along the western European margin at 1000‐year time steps during the height of the last BIIS glaciation (31–6 ka bp). This modelled IRD variability is compared with existing IRD records from the deep ocean at five cores along this margin. There is general agreement of the temporal and spatial IRD variability between observations and model through this period. The Porcupine Bank off northwestern Ireland was confirmed by the modelling as a major dividing line between sites possessing exclusively northern or southern source regions for offshore IRD. During Heinrich events 1 and 2, the cores show evidence of a proportion of North American IRD, more particularly to the south of the British Isles. Modelling supports this southern bias for likely Heinrich impact, but also suggests North American IRD will only reach the British margin in unusual circumstances. Article in Journal/Newspaper Ice Sheet Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Porcupine Bank ENVELOPE(-13.667,-13.667,53.333,53.333) Journal of Quaternary Science 36 5 934 945 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
British and Irish Ice Sheet coupled model deglaciation Heinrich event ice-rafted debris |
spellingShingle |
British and Irish Ice Sheet coupled model deglaciation Heinrich event ice-rafted debris Wilton, David J. Bigg, Grant R. Scourse, James D. Ely, Jeremy C. Clark, Chris D. Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet |
topic_facet |
British and Irish Ice Sheet coupled model deglaciation Heinrich event ice-rafted debris |
description |
The British and Irish Ice Sheet (BIIS) was highly dynamic during the Late Quaternary, with considerable regional differences in the timing and extent of its change. This was reflected in equally variable offshore ice‐rafted debris (IRD) records. Here we reconcile these two records using the FRUGAL intermediate complexity iceberg–climate model, with varying BIIS catchment‐level iceberg fluxes, to simulate change in IRD origin and magnitude along the western European margin at 1000‐year time steps during the height of the last BIIS glaciation (31–6 ka bp). This modelled IRD variability is compared with existing IRD records from the deep ocean at five cores along this margin. There is general agreement of the temporal and spatial IRD variability between observations and model through this period. The Porcupine Bank off northwestern Ireland was confirmed by the modelling as a major dividing line between sites possessing exclusively northern or southern source regions for offshore IRD. During Heinrich events 1 and 2, the cores show evidence of a proportion of North American IRD, more particularly to the south of the British Isles. Modelling supports this southern bias for likely Heinrich impact, but also suggests North American IRD will only reach the British margin in unusual circumstances. |
format |
Article in Journal/Newspaper |
author |
Wilton, David J. Bigg, Grant R. Scourse, James D. Ely, Jeremy C. Clark, Chris D. |
author_facet |
Wilton, David J. Bigg, Grant R. Scourse, James D. Ely, Jeremy C. Clark, Chris D. |
author_sort |
Wilton, David J. |
title |
Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet |
title_short |
Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet |
title_full |
Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet |
title_fullStr |
Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet |
title_full_unstemmed |
Exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last British–Irish Ice Sheet |
title_sort |
exploring the extent to which fluctuations in ice‐rafted debris reflect mass changes in the source ice sheet: a model–observation comparison using the last british–irish ice sheet |
publisher |
Wiley |
publishDate |
2021 |
url |
https://archimer.ifremer.fr/doc/00682/79424/82009.pdf https://archimer.ifremer.fr/doc/00682/79424/82010.pdf https://doi.org/10.1002/jqs.3273 https://archimer.ifremer.fr/doc/00682/79424/ |
long_lat |
ENVELOPE(-13.667,-13.667,53.333,53.333) |
geographic |
Porcupine Bank |
geographic_facet |
Porcupine Bank |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Journal Of Quaternary Science (0267-8179) (Wiley), 2021-07 , Vol. 36 , N. 5 , P. 934-945 |
op_relation |
https://archimer.ifremer.fr/doc/00682/79424/82009.pdf https://archimer.ifremer.fr/doc/00682/79424/82010.pdf doi:10.1002/jqs.3273 https://archimer.ifremer.fr/doc/00682/79424/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/jqs.3273 |
container_title |
Journal of Quaternary Science |
container_volume |
36 |
container_issue |
5 |
container_start_page |
934 |
op_container_end_page |
945 |
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1766030523268857856 |