DOI: 10.1016/j.quascirev.2015.05.002
Scopus记录号: 2-s2.0-84931274474
论文题名: Changes in biomass burning mark the onset an ENSO-influenced climate regime at 42°S in southwest Tasmania, Australia
作者: Fletcher M.-S. ; Benson A. ; Heijnis H. ; Gadd P.S. ; Cwynar L.C. ; Rees A.B.H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 122 起始页码: 222
结束页码: 232
语种: 英语
英文关键词: Climate
; El Niño-Southern Oscillation (ENSO)
; Fire
; Geochemistry
; Holocene
; Southern Hemisphere
; Southern hemisphere westerly winds (SWW)
; Tasmania
Scopus关键词: Atmospheric pressure
; Charcoal
; Fires
; Geochemistry
; Nickel
; Climate
; Holocenes
; Southern Hemisphere
; Southern oscillation
; Tasmania
; Westerly winds
; Climatology
; biomass burning
; charcoal
; climatology
; El Nino-Southern Oscillation
; fire behavior
; global climate
; Holocene
; lacustrine environment
; sediment chemistry
; Southern Hemisphere
; temporal variation
; Australia
; Pacific Ocean
; Pacific Ocean (Tropical)
; South America
; Tasmania
英文摘要: We use macroscopic charcoal and sediment geochemistry analysis of two proximal upper montane lakes located at 42°S in southwest Tasmania, Australia, to test the role of the southern hemisphere westerly winds (SWW) and the El Niño-Southern Oscillation (ENSO) in governing the climate of this sector of the southern mid-to high-latitudes. Inter-annual climate anomalies in the study area are driven by changes in both ENSO and the Southern Annular Mode (SAM - an index that describes seasonal to decadal shifts in the SWW), making it an ideal location to test assumptions about the varying influence of the SWW and ENSO, two important components of the global climate system, through time. We find multi-millennial scale trends in fire activity that are remarkably consistent with trends in hydroclimate reconstructed at the same latitude in southern South America, providing empirical support for the notion of zonally symmetric changes in the SWW governing the climate at this latitude in the Southern Hemisphere between 12 and 5calka BP. A transition from multi-millennial scale to sub-millennial scale trends in fire activity occurs after ca5calka BP in concert with the onset of high frequency and amplitude ENSO variability in the tropical Pacific Ocean region. We conclude that the onset of sub-millennial scale trends in ENSO drove changes in fire activity in our study region over the last ca5calka. Geochemical data reveals divergent local impacts at the two study sites in response to these major climate transitions that are related to local topography and geography. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59891
Appears in Collections: 过去全球变化的重建
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作者单位: School of Geography, University of Melbourne, Parkville, VIC, Australia; Institute of Ecology and Biodiversity, University of Chile, Santiago, Chile; Institute for Environmental Research, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, Australia; Department of Biology, University of New Brunswick, Fredericton, NB, Canada; School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand
Recommended Citation:
Fletcher M.-S.,Benson A.,Heijnis H.,et al. Changes in biomass burning mark the onset an ENSO-influenced climate regime at 42°S in southwest Tasmania, Australia[J]. Quaternary Science Reviews,2015-01-01,122