DOI: 10.1007/s00382-016-3191-7
Scopus记录号: 2-s2.0-84973125260
论文题名: Southern Hemisphere rainfall variability over the past 200 years
作者: Gergis J. ; Henley B.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-07-08 起始页码: 2087
结束页码: 2105
语种: 英语
英文关键词: Decadal climate variability
; Drought
; El Niño–Southern Oscillation
; Indian Ocean dipole
; Rainfall
; South Africa
; South America
; Southeastern Australia
; Southern Annular Mode
; Southern Hemisphere
英文摘要: This study presents an analysis of three palaeoclimate rainfall reconstructions from the Southern Hemisphere regions of south-eastern Australia (SEA), southern South Africa (SAF) and southern South America (SSA). We provide a first comparison of rainfall variations in these three regions over the past two centuries, with a focus on identifying synchronous wet and dry periods. Despite the uncertainties associated with the spatial and temporal limitations of the rainfall reconstructions, we find evidence of dynamically-forced climate influences. An investigation of the twentieth century relationship between regional rainfall and the large-scale climate circulation features of the Pacific, Indian and Southern Ocean regions revealed that Indo-Pacific variations of the El Niño–Southern Oscillation (ENSO) and the Indian Ocean dipole dominate rainfall variability in SEA and SAF, while the higher latitude Southern Annular Mode (SAM) exerts a greater influence in SSA. An assessment of the stability of the regional rainfall–climate circulation modes over the past two centuries revealed a number of non-stationarities, the most notable of which occurs during the early nineteenth century around 1820. This corresponds to a time when the influence of ENSO on SEA, SAF and SSA rainfall weakens and there is a strengthening of the influence of SAM. We conclude by advocating the use of long-term palaeoclimate data to estimate decadal rainfall variability for future water resource management. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: ARC, Australian Research Council
; ARC, Australian Research Council
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53277
Appears in Collections: 过去全球变化的重建
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作者单位: School of Earth Sciences, University of Melbourne, Parkville, VIC, Australia; ARC Centre of Excellence for Climate System Science, University of Melbourne, Parkville, VIC, Australia
Recommended Citation:
Gergis J.,Henley B.J.. Southern Hemisphere rainfall variability over the past 200 years[J]. Climate Dynamics,2017-01-01,48(2017-07-08)