A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction
Controversy exists over the extent of glaciation in Eastern Asia at the Last Glacial Maximum: complete ice sheet cover vs. restricted mountain icefields (an area discrepancy equivalent to 3.7 Greenland Ice Sheets). Current arguments favour the latter. However, significant last glacial ice-rafted deb...
Published in: | Earth and Planetary Science Letters |
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Language: | English |
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Online Access: | https://eprints.whiterose.ac.uk/3715/ https://eprints.whiterose.ac.uk/3715/1/wr_kamchatka.pdf https://doi.org/10.1016/j.epsl.2007.10.052 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:3715 2024-06-02T08:07:31+00:00 A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction Bigg, G.R. Clark, C.D. Hughes, A.L.C. 2008-01-30 text https://eprints.whiterose.ac.uk/3715/ https://eprints.whiterose.ac.uk/3715/1/wr_kamchatka.pdf https://doi.org/10.1016/j.epsl.2007.10.052 en eng Elsevier https://eprints.whiterose.ac.uk/3715/1/wr_kamchatka.pdf Bigg, G.R., Clark, C.D. and Hughes, A.L.C. (2008) A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction. Earth and Planetary Science Letters, 265 (3-4). pp. 559-570. ISSN 0012-821X Article PeerReviewed 2008 ftleedsuniv https://doi.org/10.1016/j.epsl.2007.10.052 2024-05-06T12:29:06Z Controversy exists over the extent of glaciation in Eastern Asia at the Last Glacial Maximum: complete ice sheet cover vs. restricted mountain icefields (an area discrepancy equivalent to 3.7 Greenland Ice Sheets). Current arguments favour the latter. However, significant last glacial ice-rafted debris (IRD) exists in NW Pacific ocean cores, which must have been sourced from a major ice sheet somewhere bordering the North Pacific. The origin of this IRD is addressed through a combination of marine core analysis, iceberg trajectory modelling and remote sensing of glacial geomorphology. We find compelling evidence for two stages of glaciation centred on the Kamchatka area of maritime southeast Russia during the last glacial, with ice extent intermediate in size between previous maximum and minimum reconstructions. Furthermore, a significant increase in iceberg flux precedes, and accompanies, a substantial marine core ash deposit at around 40ka BP. We speculate that rapid decay of the first stage of the ice sheet may have triggered substantial volcanic activity. Article in Journal/Newspaper Greenland Ice Sheet Kamchatka White Rose Research Online (Universities of Leeds, Sheffield & York) Greenland Pacific Earth and Planetary Science Letters 265 3-4 559 570 |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
Controversy exists over the extent of glaciation in Eastern Asia at the Last Glacial Maximum: complete ice sheet cover vs. restricted mountain icefields (an area discrepancy equivalent to 3.7 Greenland Ice Sheets). Current arguments favour the latter. However, significant last glacial ice-rafted debris (IRD) exists in NW Pacific ocean cores, which must have been sourced from a major ice sheet somewhere bordering the North Pacific. The origin of this IRD is addressed through a combination of marine core analysis, iceberg trajectory modelling and remote sensing of glacial geomorphology. We find compelling evidence for two stages of glaciation centred on the Kamchatka area of maritime southeast Russia during the last glacial, with ice extent intermediate in size between previous maximum and minimum reconstructions. Furthermore, a significant increase in iceberg flux precedes, and accompanies, a substantial marine core ash deposit at around 40ka BP. We speculate that rapid decay of the first stage of the ice sheet may have triggered substantial volcanic activity. |
format |
Article in Journal/Newspaper |
author |
Bigg, G.R. Clark, C.D. Hughes, A.L.C. |
spellingShingle |
Bigg, G.R. Clark, C.D. Hughes, A.L.C. A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction |
author_facet |
Bigg, G.R. Clark, C.D. Hughes, A.L.C. |
author_sort |
Bigg, G.R. |
title |
A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction |
title_short |
A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction |
title_full |
A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction |
title_fullStr |
A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction |
title_full_unstemmed |
A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction |
title_sort |
last glacial ice sheet on the pacific russian coast and catastrophic change arising from coupled ice–volcanic interaction |
publisher |
Elsevier |
publishDate |
2008 |
url |
https://eprints.whiterose.ac.uk/3715/ https://eprints.whiterose.ac.uk/3715/1/wr_kamchatka.pdf https://doi.org/10.1016/j.epsl.2007.10.052 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Greenland Ice Sheet Kamchatka |
genre_facet |
Greenland Ice Sheet Kamchatka |
op_relation |
https://eprints.whiterose.ac.uk/3715/1/wr_kamchatka.pdf Bigg, G.R., Clark, C.D. and Hughes, A.L.C. (2008) A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction. Earth and Planetary Science Letters, 265 (3-4). pp. 559-570. ISSN 0012-821X |
op_doi |
https://doi.org/10.1016/j.epsl.2007.10.052 |
container_title |
Earth and Planetary Science Letters |
container_volume |
265 |
container_issue |
3-4 |
container_start_page |
559 |
op_container_end_page |
570 |
_version_ |
1800752606254989312 |