Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period
Dust in the atmosphere plays a role in the transparency of the atmosphere1, the mineral nourishment of the oceans and can be used to constrain global circulation models today and in the past. Antarctic ice cores provide an 800,000 year record of changes in dust flux thought to reflect changes in the...
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ftunivstirling:oai:dspace.stir.ac.uk:1893/3661 2023-05-15T13:49:59+02:00 Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period Sugden, David E McCulloch, Robert Bory, Aloys J M Hein, Andrew S University of Edinburgh Biological and Environmental Sciences British Antarctic Survey orcid:0000-0001-5542-3703 2009-04 application/pdf http://hdl.handle.net/1893/3661 https://doi.org/10.1038/ngeo474 http://www.nature.com/ngeo/journal/v2/n4/full/ngeo474.html http://dspace.stir.ac.uk/bitstream/1893/3661/1/SugdenetalNatureGeoscienceSTORREver.pdf en eng Nature Publishing Group / Macmillan Publishers Limited Sugden DE, McCulloch R, Bory AJM & Hein AS (2009) Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period. Nature Geoscience, 2 (4), pp. 281-285. http://www.nature.com/ngeo/journal/v2/n4/full/ngeo474.html; https://doi.org/10.1038/ngeo474 http://hdl.handle.net/1893/3661 doi:10.1038/ngeo474 http://www.nature.com/ngeo/journal/v2/n4/full/ngeo474.html WOS:000265240100019 2-s2.0-67649529400 833899 http://dspace.stir.ac.uk/bitstream/1893/3661/1/SugdenetalNatureGeoscienceSTORREver.pdf Published in Nature Geoscience by Nature Publishing Group / Macmillan Publishers Limited. doi:10.1038/ngeo474. Antarctic dust Patagonia Last glaciation Climate changing Paleoclimatology Geology Stratigraphic Journal Article AM - Accepted Manuscript 2009 ftunivstirling https://doi.org/10.1038/ngeo474 2022-06-13T18:45:42Z Dust in the atmosphere plays a role in the transparency of the atmosphere1, the mineral nourishment of the oceans and can be used to constrain global circulation models today and in the past. Antarctic ice cores provide an 800,000 year record of changes in dust flux thought to reflect changes in the vigour of global atmospheric circulation and environmental conditions in source areas. Here for the first time we link the source of Last Glacial dust peaks in Antarctica to the gravel outwash plains of Patagonian glaciers in the Magellan area of southernmost South America. We find that there is an on-off switch in that the peaks coincide with episodes when glaciers discharge sediment directly onto outwash plains but not when they terminate in lakes. This finding helps solve several long-standing puzzles, namely: why both dust and fresh water diatom concentrations during glacial maxima are so much higher (x ~20) than at the present day; why dust peaks occur only below a certain temperature threshold; and why the decline in dust concentrations at the end of glacial cycles precedes the main phase of warming, the rise in sea level, and the reduction in southern hemisphere sea ice extent. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice University of Stirling: Stirling Digital Research Repository Antarctic Patagonia Nature Geoscience 2 4 281 285 |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
topic |
Antarctic dust Patagonia Last glaciation Climate changing Paleoclimatology Geology Stratigraphic |
spellingShingle |
Antarctic dust Patagonia Last glaciation Climate changing Paleoclimatology Geology Stratigraphic Sugden, David E McCulloch, Robert Bory, Aloys J M Hein, Andrew S Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period |
topic_facet |
Antarctic dust Patagonia Last glaciation Climate changing Paleoclimatology Geology Stratigraphic |
description |
Dust in the atmosphere plays a role in the transparency of the atmosphere1, the mineral nourishment of the oceans and can be used to constrain global circulation models today and in the past. Antarctic ice cores provide an 800,000 year record of changes in dust flux thought to reflect changes in the vigour of global atmospheric circulation and environmental conditions in source areas. Here for the first time we link the source of Last Glacial dust peaks in Antarctica to the gravel outwash plains of Patagonian glaciers in the Magellan area of southernmost South America. We find that there is an on-off switch in that the peaks coincide with episodes when glaciers discharge sediment directly onto outwash plains but not when they terminate in lakes. This finding helps solve several long-standing puzzles, namely: why both dust and fresh water diatom concentrations during glacial maxima are so much higher (x ~20) than at the present day; why dust peaks occur only below a certain temperature threshold; and why the decline in dust concentrations at the end of glacial cycles precedes the main phase of warming, the rise in sea level, and the reduction in southern hemisphere sea ice extent. |
author2 |
University of Edinburgh Biological and Environmental Sciences British Antarctic Survey orcid:0000-0001-5542-3703 |
format |
Article in Journal/Newspaper |
author |
Sugden, David E McCulloch, Robert Bory, Aloys J M Hein, Andrew S |
author_facet |
Sugden, David E McCulloch, Robert Bory, Aloys J M Hein, Andrew S |
author_sort |
Sugden, David E |
title |
Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period |
title_short |
Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period |
title_full |
Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period |
title_fullStr |
Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period |
title_full_unstemmed |
Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period |
title_sort |
influence of patagonian glaciers on antarctic dust deposition during the last glacial period |
publisher |
Nature Publishing Group / Macmillan Publishers Limited |
publishDate |
2009 |
url |
http://hdl.handle.net/1893/3661 https://doi.org/10.1038/ngeo474 http://www.nature.com/ngeo/journal/v2/n4/full/ngeo474.html http://dspace.stir.ac.uk/bitstream/1893/3661/1/SugdenetalNatureGeoscienceSTORREver.pdf |
geographic |
Antarctic Patagonia |
geographic_facet |
Antarctic Patagonia |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
Sugden DE, McCulloch R, Bory AJM & Hein AS (2009) Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period. Nature Geoscience, 2 (4), pp. 281-285. http://www.nature.com/ngeo/journal/v2/n4/full/ngeo474.html; https://doi.org/10.1038/ngeo474 http://hdl.handle.net/1893/3661 doi:10.1038/ngeo474 http://www.nature.com/ngeo/journal/v2/n4/full/ngeo474.html WOS:000265240100019 2-s2.0-67649529400 833899 http://dspace.stir.ac.uk/bitstream/1893/3661/1/SugdenetalNatureGeoscienceSTORREver.pdf |
op_rights |
Published in Nature Geoscience by Nature Publishing Group / Macmillan Publishers Limited. doi:10.1038/ngeo474. |
op_doi |
https://doi.org/10.1038/ngeo474 |
container_title |
Nature Geoscience |
container_volume |
2 |
container_issue |
4 |
container_start_page |
281 |
op_container_end_page |
285 |
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1766252687909715968 |