DOI: 10.1175/JCLI-D-12-00003.1
Scopus记录号: 2-s2.0-84874883648
论文题名: A millennial proxy record of ENSO and eastern Australian rainfall from the law dome ice core, east Antarctica
作者: Vance T.R. ; Van Ommen T.D. ; Curran M.A.J. ; Plummer C.T. ; Moy A.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 3 起始页码: 710
结束页码: 725
语种: 英语
Scopus关键词: Antarctica
; Atmospheric anomaly
; Australian rainfall
; Equatorial Pacific
; Inter-decadal pacific oscillations
; South-eastern Australia
; Southern latitudes
; Teleconnections
; Deposition
; Domes
; Spectrum analysis
; Rain
; circumpolar current
; climate change
; climate variation
; decadal variation
; El Nino-Southern Oscillation
; ice core
; paleoclimate
; proxy climate record
; rainfall
; salt dome
; sea salt
; teleconnection
; wind velocity
; zonal wind
; Antarctica
; Australia
; Pacific Ocean
; Pacific Ocean (South)
; West Antarctica
英文摘要: ENSO causes climate extremes across and beyond the Pacific basin; however, evidence of ENSO at high southern latitudes is generally restricted to the South Pacific and West Antarctica. Here, the authors report a statistically significant link betweenENSOand sea salt deposition during summer from the Law Dome (LD) ice core in East Antarctica. ENSO-related atmospheric anomalies from the central-western equatorial Pacific (CWEP) propagate to the South Pacific and the circumpolar high latitudes. These anomalies modulate highlatitude zonal winds, with El Niño (La Niña) conditions causing reduced (enhanced) zonal wind speeds and subsequent reduced (enhanced) summer sea salt deposition at LD. Over the last 1010 yr, the LD summer sea salt (LDSSS) record has exhibited two below-average (El Niño-like) epochs, 1000-1260AD and 1920-2009AD, and a longer above-average (La Niña-like) epoch from 1260 to 1860 AD. Spectral analysis shows the belowaverage epochs are associated with enhanced ENSO-like variability around 2-5 yr, while the above-average epoch is associated more with variability around 6-7 yr. The LDSSS record is also significantly correlated with annual rainfall in eastern mainland Australia. While the correlation displays decadal-scale variability similar to changes in the interdecadal Pacific oscillation (IPO), the LDSSS record suggests rainfall in the modern instrumental era (1910-2009 AD) is below the long-term average. In addition, recent rainfall declines in some regions of eastern and southeastern Australia appear to be mirrored by a downward trend in the LDSSS record, suggesting current rainfall regimes are unusual though not unknown over the last millennium. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52025
Appears in Collections: 气候变化事实与影响
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作者单位: Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia; Australian Antarctic Division, Kingston, Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia
Recommended Citation:
Vance T.R.,Van Ommen T.D.,Curran M.A.J.,et al. A millennial proxy record of ENSO and eastern Australian rainfall from the law dome ice core, east Antarctica[J]. Journal of Climate,2013-01-01,26(3)