Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium
The Interdecadal Pacific Oscillation (IPO) influences multidecadal drought risk across the Pacific, but there are no millennial-length, high-resolution IPO reconstructions for quantifying long-term drought risk. In Australia, drought risk increases in positive phases of the IPO, yet few suitable rai...
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ftunivtasecite:oai:ecite.utas.edu.au:98025 2023-05-15T13:37:24+02:00 Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium Vance, TR Roberts, JL Plummer, CT Kiem, AS van Ommen, TD 2015 application/pdf https://doi.org/10.1002/2014GL062447 http://ecite.utas.edu.au/98025 en eng American Geophysical Union http://ecite.utas.edu.au/98025/2/Vance_et_al-2015-Geophysical_Research_Letters.pdf http://dx.doi.org/10.1002/2014GL062447 Vance, TR and Roberts, JL and Plummer, CT and Kiem, AS and van Ommen, TD, Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium, Geophysical Research Letters, 42, (1) pp. 129-137. ISSN 0094-8276 (2015) [Refereed Article] http://ecite.utas.edu.au/98025 Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology Refereed Article PeerReviewed 2015 ftunivtasecite https://doi.org/10.1002/2014GL062447 2019-12-13T22:00:06Z The Interdecadal Pacific Oscillation (IPO) influences multidecadal drought risk across the Pacific, but there are no millennial-length, high-resolution IPO reconstructions for quantifying long-term drought risk. In Australia, drought risk increases in positive phases of the IPO, yet few suitable rainfall proxies and short (∼100 years) instrumental records mean large uncertainties remain around drought frequency and duration. Likewise, it is unknown whether megadroughts have occurred in Australia's past. In this study, an atmospheric teleconnection in the Indian Ocean midlatitudes linking East Antarctica and Australia is exploited to produce the first accurate, annually dated millennial-length IPO reconstruction from the Law Dome (East Antarctica) ice core. Combined with an eastern Australian rainfall proxy from Law Dome, the first millennial-length Australian megadrought (>5 year duration) reconstruction is presented. Eight megadroughts are identified including one 39 year drought (A.D. 11741212), which occurred during an unprecedented century of aridity (A.D. 11021212). Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core eCite UTAS (University of Tasmania) Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) East Antarctica Indian Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Pacific Geophysical Research Letters 42 1 129 137 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology Vance, TR Roberts, JL Plummer, CT Kiem, AS van Ommen, TD Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology |
description |
The Interdecadal Pacific Oscillation (IPO) influences multidecadal drought risk across the Pacific, but there are no millennial-length, high-resolution IPO reconstructions for quantifying long-term drought risk. In Australia, drought risk increases in positive phases of the IPO, yet few suitable rainfall proxies and short (∼100 years) instrumental records mean large uncertainties remain around drought frequency and duration. Likewise, it is unknown whether megadroughts have occurred in Australia's past. In this study, an atmospheric teleconnection in the Indian Ocean midlatitudes linking East Antarctica and Australia is exploited to produce the first accurate, annually dated millennial-length IPO reconstruction from the Law Dome (East Antarctica) ice core. Combined with an eastern Australian rainfall proxy from Law Dome, the first millennial-length Australian megadrought (>5 year duration) reconstruction is presented. Eight megadroughts are identified including one 39 year drought (A.D. 11741212), which occurred during an unprecedented century of aridity (A.D. 11021212). |
format |
Article in Journal/Newspaper |
author |
Vance, TR Roberts, JL Plummer, CT Kiem, AS van Ommen, TD |
author_facet |
Vance, TR Roberts, JL Plummer, CT Kiem, AS van Ommen, TD |
author_sort |
Vance, TR |
title |
Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium |
title_short |
Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium |
title_full |
Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium |
title_fullStr |
Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium |
title_full_unstemmed |
Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium |
title_sort |
interdecadal pacific variability and eastern australian megadroughts over the last millennium |
publisher |
American Geophysical Union |
publishDate |
2015 |
url |
https://doi.org/10.1002/2014GL062447 http://ecite.utas.edu.au/98025 |
long_lat |
ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Dome The East Antarctica Indian Law Dome Pacific |
geographic_facet |
Dome The East Antarctica Indian Law Dome Pacific |
genre |
Antarc* Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctica East Antarctica ice core |
op_relation |
http://ecite.utas.edu.au/98025/2/Vance_et_al-2015-Geophysical_Research_Letters.pdf http://dx.doi.org/10.1002/2014GL062447 Vance, TR and Roberts, JL and Plummer, CT and Kiem, AS and van Ommen, TD, Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium, Geophysical Research Letters, 42, (1) pp. 129-137. ISSN 0094-8276 (2015) [Refereed Article] http://ecite.utas.edu.au/98025 |
op_doi |
https://doi.org/10.1002/2014GL062447 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
1 |
container_start_page |
129 |
op_container_end_page |
137 |
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1766091492757078016 |