DOI: 10.1016/j.quascirev.2018.07.018
Scopus记录号: 2-s2.0-85050388672
论文题名: Coherent patterns of environmental change at multiple organic spring sites in northwest Australia: Evidence of Indonesian-Australian summer monsoon variability over the last 14,500 years
作者: Field E. ; Tyler J. ; Gadd P.S. ; Moss P. ; McGowan H. ; Marx S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 196 起始页码: 193
结束页码: 216
语种: 英语
英文关键词: Kimberley
; Monsoon
; Monte Carlo empirical orthogonal functions
; Multi-proxy
; Multi-site
; Non-pollen palynomorphs
; Organic spring
; Pollen
; μXRF
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Monte Carlo methods
; Orthogonal functions
; Sea level
; Silicon compounds
; Surface waters
; Titanium compounds
; Tropics
; Empirical Orthogonal Function
; Kimberley
; Monsoon
; Multi proxies
; Multi-site
; Palynomorphs
; Pollen
; Principal component analysis
; climate variation
; deglaciation
; El Nino-Southern Oscillation
; environmental change
; historical record
; intertropical convergence zone
; monsoon
; Monte Carlo analysis
; palynomorph
; pollen
; principal component analysis
; proxy climate record
; Quaternary
; sea level change
; tropical environment
; X-ray fluorescence
; Younger Dryas
; Australia
; Indonesia
; Kimberley [Western Australia]
; Western Australia
英文摘要: At present, knowledge of late Quaternary variability of the Indonesian-Australian summer monsoon in the Australian tropics is limited. Organic spring deposits, which occur throughout the Kimberley region of northwest Australia, are valuable archives that contain records spanning the past ∼14,500 years. In this study we compare multiple proxies from three organic springs. Principal Components Analyses demonstrates similar patterns of change in the elemental and non-pollen palynomorph (NPP) datasets between the springs, implying regional drivers are responsible for changes in these proxies. By comparison, the pollen records differ between each of the springs, with the assemblage at each thought to be influenced by spring recharge and evolution rather than climate variability. In order to empirically and objectively assess the synchronicity of changes, we applied Monte Carlo empirical orthogonal function (MCEOF) analysis to one variable in each μXRF and NPP dataset (Si/Ti ratios and Pseudoschizaea accumulation rates, as these proxies are expected to reflect hydrological conditions in springs) to assess regional patterns of change in site moisture. This analysis revealed periods of increased monsoonal precipitation from ∼14,500–7500 cal. yr BP corresponding with deglacial sea level rise, high orbital tilt coupled with warmer sea surface temperatures, and with possible links to a southward migration of the Inter Tropical Convergence Zone (ITCZ) during the Younger Dryas. Monsoonal precipitation was reduced from 7500 cal. yr BP coinciding with the culmination of deglacial sea level rise and a possible northward shift in the mean position of the ITCZ, in addition to between 2600 and 1000 cal. yr BP corresponding with increased moderate-to-strong ENSO events. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112082
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: School of Earth and Environmental Sciences, University of Queensland, Australia; Department of Earth Sciences and Sprigg Geobiology Centre, Department of Earth Sciences, University of Adelaide, Australia; Australian Nuclear Science and Technology Organisation, Lucas Heights, Australia; GeoQuEST Research Centre, School of Earth and Environmental Sciences, University of Wollongong, Australia
Recommended Citation:
Field E.,Tyler J.,Gadd P.S.,et al. Coherent patterns of environmental change at multiple organic spring sites in northwest Australia: Evidence of Indonesian-Australian summer monsoon variability over the last 14,500 years[J]. Quaternary Science Reviews,2018-01-01,196