DOI: 10.1016/j.quascirev.2016.09.010
Scopus记录号: 2-s2.0-84988487460
论文题名: Stable isotopic signature of Australian monsoon controlled by regional convection
作者: Zwart C. ; Munksgaard N.C. ; Kurita N. ; Bird M.I.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 151 起始页码: 228
结束页码: 235
语种: 英语
英文关键词: Climate proxy records Australia
; Convection
; MJO
; Monsoon variability
; Palaeoclimatology
; Precipitation
; Stable isotopes
; Tropics
Scopus关键词: Atmospheric thermodynamics
; Climatology
; Heat convection
; Precipitation (chemical)
; Rain
; Tropics
; Australia
; Intra-seasonal variabilities
; Meteorological parameters
; Monsoon variability
; Outgoing longwave radiation
; Palaeoclimatology
; Precipitation systems
; Stable isotopes
; Isotopes
; atmospheric convection
; climate variation
; isotopic analysis
; Madden-Julian oscillation
; monsoon
; paleoclimate
; precipitation (climatology)
; proxy climate record
; regional climate
; stable isotope
; tropical region
; Australia
英文摘要: The aim of this study was to identify the main meteorological drivers of rainfall isotopic variation in north Australia in order to improve the interpretation of isotopic proxy records in this region. An intense monitoring program was conducted during two monsoonal events that showed significant and systematic isotopic change over time. The results showed a close link between isotopic variation in precipitation and variability in monsoon conditions, associated with the presence of large convective envelopes propagating through the study site. The largest negative amplitudes in the isotopic signal were observed when eastward and westward moving precipitation systems within the convective envelope merged over the measurement site. This suggests that the amplitude of the isotopic signal is related to the size and activity of the convective envelope. The strong correlation between rainfall isotopic variation, regional outgoing longwave radiation and regional rainfall amount supports this conclusion. This is further strengthened by the strong relationship between isotopic variation and the integrated rainfall history of air masses prior to arriving at the measurement locations. A local amount effect was not significant and these findings support the interpretation of δ18O as proxy for regional climatic conditions rather than local rainfall amount. Meteorological parameters that characterize intra-seasonal variability of monsoon conditions were also found to be strongly linked to inter-seasonal variability of the monthly based δ18O values in the Global Network of Isotopes in Precipitation (GNIP) database. This leads to the conclusion that information about the Australian monsoon variability can likely be inferred from the isotopic proxy record in North Australia on short (intra seasonal) and long (inter seasonal or longer) timescales. © 2016 Elsevier Ltd 资助项目: The authors gratefully acknowledge the sampling volunteers: A. Campbell, D. Buckle, D. Lambrinidis, A. Padovan, F. Foti, H. Stone, N. Shoobridge, E. Garcia, W. Smith, M. Lauva, M. Sandery, H. Seneviratne, K. O'Donnell, B. Royal, F. Downing, S. Carthew, J& D. Prescott. Funding - Research supported by the Australian Research Council (FL140100044 to MIB) and an Australian Postgraduate Award (APA) to CZ.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59427
Appears in Collections: 过去全球变化的重建
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作者单位: Centre for Tropical Environmental and Sustainability Science, College of Science, Technology and Engineering, James Cook University, P.O. Box 6811, Cairns, Australia; Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, Australia; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
Recommended Citation:
Zwart C.,Munksgaard N.C.,Kurita N.,et al. Stable isotopic signature of Australian monsoon controlled by regional convection[J]. Quaternary Science Reviews,2016-01-01,151