Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean
The Southern Hemisphere westerly wind belt (SHWW) is a major feature of Southern Hemisphere, midlatitude climate that is closely linked with the sequestration and release of CO2 in the Southern Ocean. Past changes in the strength and position of this wind belt are poorly resolved, particularly acros...
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Online Access: | https://eprints.soton.ac.uk/468894/ https://eprints.soton.ac.uk/468894/1/g49805.1.pdf |
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ftsouthampton:oai:eprints.soton.ac.uk:468894 2023-12-03T10:11:22+01:00 Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean Monteath, Alistair Hughes, Paul Cooper, Matthew Groff, Dulcinea Scaife, Rob Hodgson, Dominic 2022-08-01 text https://eprints.soton.ac.uk/468894/ https://eprints.soton.ac.uk/468894/1/g49805.1.pdf en English eng https://eprints.soton.ac.uk/468894/1/g49805.1.pdf Monteath, Alistair, Hughes, Paul, Cooper, Matthew, Groff, Dulcinea, Scaife, Rob and Hodgson, Dominic (2022) Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean. Geology, 50 (8), 880-885. (doi:10.1130/g49805.1 <http://dx.doi.org/10.1130/g49805.1>). Article PeerReviewed 2022 ftsouthampton https://doi.org/10.1130/g49805.1 2023-11-03T00:05:25Z The Southern Hemisphere westerly wind belt (SHWW) is a major feature of Southern Hemisphere, midlatitude climate that is closely linked with the sequestration and release of CO2 in the Southern Ocean. Past changes in the strength and position of this wind belt are poorly resolved, particularly across the Pleistocene-Holocene transition, a time period associated with fluctuations in atmospheric temperatures and CO2 levels. We used dust geochemistry, particle size measurements, and paleoecological analyses from a peat sequence in the Falkland Islands, South Atlantic Ocean, to describe changes in the SHWW between 16.0 and 6.5 ka (thousands of years before CE 1950). Wind strength was low at ~51°S before and during the Antarctic Cold Reversal (ACR, 14.9–13.0 ka), intensified between 13.1 and 12.1 ka as atmospheric temperatures increased, and then weakened, reaching a minimum between 12.1 and 10.9 ka during the Early Holocene thermal maximum. Northwesterly air masses became more dominant from 12.0 to 10.2 ka, and wind strength remained low until our record was affected by a storm surge or tsunami ca. 7.8 ka. These data indicate a southward shift in the latitude of the SHWW, from north of 51°S prior to and during the ACR, at ~51°S before the onset of the Holocene, and south of 51°S during the early Holocene thermal maximum. This pattern suggests that the latitude of the SHWW was coupled with atmospheric temperatures through the Pleistocene-Holocene transition. Article in Journal/Newspaper Antarc* Antarctic South Atlantic Ocean Southern Ocean University of Southampton: e-Prints Soton Antarctic Southern Ocean The Antarctic Geology 50 8 880 885 |
institution |
Open Polar |
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University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The Southern Hemisphere westerly wind belt (SHWW) is a major feature of Southern Hemisphere, midlatitude climate that is closely linked with the sequestration and release of CO2 in the Southern Ocean. Past changes in the strength and position of this wind belt are poorly resolved, particularly across the Pleistocene-Holocene transition, a time period associated with fluctuations in atmospheric temperatures and CO2 levels. We used dust geochemistry, particle size measurements, and paleoecological analyses from a peat sequence in the Falkland Islands, South Atlantic Ocean, to describe changes in the SHWW between 16.0 and 6.5 ka (thousands of years before CE 1950). Wind strength was low at ~51°S before and during the Antarctic Cold Reversal (ACR, 14.9–13.0 ka), intensified between 13.1 and 12.1 ka as atmospheric temperatures increased, and then weakened, reaching a minimum between 12.1 and 10.9 ka during the Early Holocene thermal maximum. Northwesterly air masses became more dominant from 12.0 to 10.2 ka, and wind strength remained low until our record was affected by a storm surge or tsunami ca. 7.8 ka. These data indicate a southward shift in the latitude of the SHWW, from north of 51°S prior to and during the ACR, at ~51°S before the onset of the Holocene, and south of 51°S during the early Holocene thermal maximum. This pattern suggests that the latitude of the SHWW was coupled with atmospheric temperatures through the Pleistocene-Holocene transition. |
format |
Article in Journal/Newspaper |
author |
Monteath, Alistair Hughes, Paul Cooper, Matthew Groff, Dulcinea Scaife, Rob Hodgson, Dominic |
spellingShingle |
Monteath, Alistair Hughes, Paul Cooper, Matthew Groff, Dulcinea Scaife, Rob Hodgson, Dominic Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean |
author_facet |
Monteath, Alistair Hughes, Paul Cooper, Matthew Groff, Dulcinea Scaife, Rob Hodgson, Dominic |
author_sort |
Monteath, Alistair |
title |
Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean |
title_short |
Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean |
title_full |
Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean |
title_fullStr |
Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean |
title_full_unstemmed |
Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean |
title_sort |
late glacial–holocene record of southern hemisphere westerly wind dynamics from the falkland islands, south atlantic ocean |
publishDate |
2022 |
url |
https://eprints.soton.ac.uk/468894/ https://eprints.soton.ac.uk/468894/1/g49805.1.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic South Atlantic Ocean Southern Ocean |
op_relation |
https://eprints.soton.ac.uk/468894/1/g49805.1.pdf Monteath, Alistair, Hughes, Paul, Cooper, Matthew, Groff, Dulcinea, Scaife, Rob and Hodgson, Dominic (2022) Late glacial–holocene record of Southern Hemisphere westerly wind dynamics from the Falkland Islands, South Atlantic Ocean. Geology, 50 (8), 880-885. (doi:10.1130/g49805.1 <http://dx.doi.org/10.1130/g49805.1>). |
op_doi |
https://doi.org/10.1130/g49805.1 |
container_title |
Geology |
container_volume |
50 |
container_issue |
8 |
container_start_page |
880 |
op_container_end_page |
885 |
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1784277657082396672 |