Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S)
The Southern Ocean plays a significant role in driving global climate-ocean-carbon dynamics. Unfortunately, a relative dearth of datasets across the region limits our ability to understand past and future mechanisms of change. Here we report a new dataset from the south-west Pacific: radiocarbon-dat...
Published in: | Journal of Quaternary Science |
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Language: | English |
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ftsouthampton:oai:eprints.soton.ac.uk:479325 2023-07-30T04:02:27+02:00 Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S) Turney, Chris S.M. McGlone, Matt Palmer, Jonathan Fogwill, Christopher Hogg, Alan Thomas, Zoë A. Lipson, Mathew Wilmshurst, Janet M. Fenwick, Pavla Jones, Richard T. Hines, Ben Clark, Graeme F. 2016-01-08 https://eprints.soton.ac.uk/479325/ English eng Turney, Chris S.M., McGlone, Matt, Palmer, Jonathan, Fogwill, Christopher, Hogg, Alan, Thomas, Zoë A., Lipson, Mathew, Wilmshurst, Janet M., Fenwick, Pavla, Jones, Richard T., Hines, Ben and Clark, Graeme F. (2016) Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S). Journal of Quaternary Science, 31 (1), 12-19. (doi:10.1002/jqs.2828 <http://dx.doi.org/10.1002/jqs.2828>). Article PeerReviewed 2016 ftsouthampton https://doi.org/10.1002/jqs.2828 2023-07-20T22:19:29Z The Southern Ocean plays a significant role in driving global climate-ocean-carbon dynamics. Unfortunately, a relative dearth of datasets across the region limits our ability to understand past and future mechanisms of change. Here we report a new dataset from the south-west Pacific: radiocarbon-dated subfossil tree stumps (Dracophyllum) eroding out from peat exposures on Campbell and Auckland Islands (52-50°S). Dracophyllum are the southernmost growing trees in the south-west Pacific and their growth on exposed sites and at altitude is strongly controlled by the prevailing westerly airflow, providing a unique measure of past changes in zonal wind strength. Here we demonstrate a significant collapse in the altitudinal limit of growth between approximately 2000 and 1000 years ago (hereafter 2-1ka), consistent with other records across the Southern Hemisphere that indicate westerly airflow was significantly enhanced. Importantly, this period in the late Holocene was one of marked change across the broader region, suggesting westerly airflow played a key role in driving Southern Ocean variability at this time. Article in Journal/Newspaper Auckland Islands Southern Ocean University of Southampton: e-Prints Soton Southern Ocean Pacific Journal of Quaternary Science 31 1 12 19 |
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Open Polar |
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University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The Southern Ocean plays a significant role in driving global climate-ocean-carbon dynamics. Unfortunately, a relative dearth of datasets across the region limits our ability to understand past and future mechanisms of change. Here we report a new dataset from the south-west Pacific: radiocarbon-dated subfossil tree stumps (Dracophyllum) eroding out from peat exposures on Campbell and Auckland Islands (52-50°S). Dracophyllum are the southernmost growing trees in the south-west Pacific and their growth on exposed sites and at altitude is strongly controlled by the prevailing westerly airflow, providing a unique measure of past changes in zonal wind strength. Here we demonstrate a significant collapse in the altitudinal limit of growth between approximately 2000 and 1000 years ago (hereafter 2-1ka), consistent with other records across the Southern Hemisphere that indicate westerly airflow was significantly enhanced. Importantly, this period in the late Holocene was one of marked change across the broader region, suggesting westerly airflow played a key role in driving Southern Ocean variability at this time. |
format |
Article in Journal/Newspaper |
author |
Turney, Chris S.M. McGlone, Matt Palmer, Jonathan Fogwill, Christopher Hogg, Alan Thomas, Zoë A. Lipson, Mathew Wilmshurst, Janet M. Fenwick, Pavla Jones, Richard T. Hines, Ben Clark, Graeme F. |
spellingShingle |
Turney, Chris S.M. McGlone, Matt Palmer, Jonathan Fogwill, Christopher Hogg, Alan Thomas, Zoë A. Lipson, Mathew Wilmshurst, Janet M. Fenwick, Pavla Jones, Richard T. Hines, Ben Clark, Graeme F. Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S) |
author_facet |
Turney, Chris S.M. McGlone, Matt Palmer, Jonathan Fogwill, Christopher Hogg, Alan Thomas, Zoë A. Lipson, Mathew Wilmshurst, Janet M. Fenwick, Pavla Jones, Richard T. Hines, Ben Clark, Graeme F. |
author_sort |
Turney, Chris S.M. |
title |
Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S) |
title_short |
Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S) |
title_full |
Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S) |
title_fullStr |
Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S) |
title_full_unstemmed |
Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S) |
title_sort |
intensification of southern hemisphere westerly winds 2000-1000 years ago: evidence from the subantarctic campbell and auckland islands (52-50°s) |
publishDate |
2016 |
url |
https://eprints.soton.ac.uk/479325/ |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
Auckland Islands Southern Ocean |
genre_facet |
Auckland Islands Southern Ocean |
op_relation |
Turney, Chris S.M., McGlone, Matt, Palmer, Jonathan, Fogwill, Christopher, Hogg, Alan, Thomas, Zoë A., Lipson, Mathew, Wilmshurst, Janet M., Fenwick, Pavla, Jones, Richard T., Hines, Ben and Clark, Graeme F. (2016) Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: Evidence from the subantarctic Campbell and Auckland Islands (52-50°S). Journal of Quaternary Science, 31 (1), 12-19. (doi:10.1002/jqs.2828 <http://dx.doi.org/10.1002/jqs.2828>). |
op_doi |
https://doi.org/10.1002/jqs.2828 |
container_title |
Journal of Quaternary Science |
container_volume |
31 |
container_issue |
1 |
container_start_page |
12 |
op_container_end_page |
19 |
_version_ |
1772813267049119744 |