DOI: 10.1002/2014GL062447
论文题名: Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium
作者: Vance T.R. ; Roberts J.L. ; Plummer C.T. ; Kiem A.S. ; Van Ommen T.D.
刊名: Geophysical Research Letters
ISSN: 0094-9081
EISSN: 1944-8812
出版年: 2015
卷: 42, 期: 1 起始页码: 129
结束页码: 137
语种: 英语
英文关键词: Australia
; Interdecadal Pacific Oscillation
; megadroughts
; reconstruction
Scopus关键词: Domes
; Image reconstruction
; Rain
; Australia
; Australian rainfall
; East antarctica
; High resolution
; Inter-decadal pacific oscillations
; Last millenniums
; Megadroughts
; Teleconnections
; Drought
; decadal variation
; ice core
; latitude
; Pacific Decadal Oscillation
; proxy climate record
; uncertainty analysis
; Antarctica
; Australia
; East Antarctica
; Law Dome
英文摘要: 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. 1174-1212), which occurred during an unprecedented century of aridity (A.D. 1102-1212). Key Points One kiloyear Interdecadal Pacific Oscillation and Australian drought record Twelfth century was exceptionally arid in eastern Australia Australian water policy needs to account for future megadroughts ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921888689&doi=10.1002%2f2014GL062447&partnerID=40&md5=63488d2925cc76b76f36605a60d2ba38
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8697
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Australia
Recommended Citation:
Vance T.R.,Roberts J.L.,Plummer C.T.,et al. Interdecadal Pacific variability and eastern Australian megadroughts over the last millennium[J]. Geophysical Research Letters,2015-01-01,42(1).