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...
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Online Access: | http://hdl.handle.net/1959.4/unsworks_37360 https://doi.org/10.1002/jqs.2828 |
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ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/unsworks_37360 2024-06-02T08:03:45+00:00 Intensification of Southern Hemisphere westerly winds 2000-1000 years ago: evidence from the subantarctic Campbell and Auckland Islands (52-50°S) Turney, Chris SM 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 http://hdl.handle.net/1959.4/unsworks_37360 https://doi.org/10.1002/jqs.2828 unknown Wiley http://purl.org/au-research/grants/arc/DP130104156 http://purl.org/au-research/grants/arc/FT120100004 http://purl.org/au-research/grants/arc/LP120200724 http://doi.wiley.com/10.1002/jqs.2828 http://hdl.handle.net/1959.4/unsworks_37360 https://doi.org/10.1002/jqs.2828 metadata only access http://purl.org/coar/access_right/c_14cb CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ urn:ISSN:0267-8179 urn:ISSN:1099-1417 Journal of Quaternary Science, 31, 1, 12-19 anzsrc-for: 0403 Geology anzsrc-for: 0406 Physical Geography and Environmental Geoscience anzsrc-for: 2101 Archaeology journal article http://purl.org/coar/resource_type/c_6501 2016 ftunswworks https://doi.org/10.1002/jqs.2828 2024-05-07T23:48:05Z 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 UNSW Sydney (The University of New South Wales): UNSWorks Pacific Southern Ocean Journal of Quaternary Science 31 1 12 19 |
institution |
Open Polar |
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UNSW Sydney (The University of New South Wales): UNSWorks |
op_collection_id |
ftunswworks |
language |
unknown |
topic |
anzsrc-for: 0403 Geology anzsrc-for: 0406 Physical Geography and Environmental Geoscience anzsrc-for: 2101 Archaeology |
spellingShingle |
anzsrc-for: 0403 Geology anzsrc-for: 0406 Physical Geography and Environmental Geoscience anzsrc-for: 2101 Archaeology Turney, Chris SM 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) |
topic_facet |
anzsrc-for: 0403 Geology anzsrc-for: 0406 Physical Geography and Environmental Geoscience anzsrc-for: 2101 Archaeology |
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 SM 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_facet |
Turney, Chris SM 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 SM |
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) |
publisher |
Wiley |
publishDate |
2016 |
url |
http://hdl.handle.net/1959.4/unsworks_37360 https://doi.org/10.1002/jqs.2828 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Auckland Islands Southern Ocean |
genre_facet |
Auckland Islands Southern Ocean |
op_source |
urn:ISSN:0267-8179 urn:ISSN:1099-1417 Journal of Quaternary Science, 31, 1, 12-19 |
op_relation |
http://purl.org/au-research/grants/arc/DP130104156 http://purl.org/au-research/grants/arc/FT120100004 http://purl.org/au-research/grants/arc/LP120200724 http://doi.wiley.com/10.1002/jqs.2828 http://hdl.handle.net/1959.4/unsworks_37360 https://doi.org/10.1002/jqs.2828 |
op_rights |
metadata only access http://purl.org/coar/access_right/c_14cb CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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_ |
1800748356692082688 |