DOI: 10.1007/s00382-014-2159-8
Scopus记录号: 2-s2.0-84939881669
论文题名: The ENSO-Australian rainfall teleconnection in reanalysis and CMIP5
作者: King A.D. ; Donat M.G. ; Alexander L.V. ; Karoly D.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-09-10 起始页码: 2623
结束页码: 2635
语种: 英语
英文关键词: Asymmetry
; Dynamics
; El Niño-southern oscillation
; Precipitation
; Thermodynamics
; Twentieth century reanalysis
英文摘要: Australian rainfall is strongly influenced by El Niño-southern oscillation (ENSO). The relationship between ENSO and rainfall in eastern Australia is non-linear; the magnitude of La Niña events has a greater effect on rainfall than does the magnitude of El Niño events, and the cause of the non-linearity is unclear from previous work. The twentieth century reanalysis succeeds in capturing the asymmetric ENSO-rainfall relationship. In the reanalysis the asymmetry is strongly related to moisture availability in the south-west Pacific whereas wind flow is of less importance. Some global climate models (GCMs) in the coupled model intercomparison project (CMIP5) archive capture the asymmetric nature of the ENSO-rainfall relationship whilst others do not. Differences in thermodynamic processes and their relationships with ENSO are the primary cause of variability in model performance. Analysis of an atmosphere-only run of a GCM which fails to capture the non-linear ENSO-rainfall relationship is also conducted. The atmospheric run forced by observed sea surface temperatures shows no significant improvement in the ENSO-rainfall relationship over the corresponding coupled model run in the CMIP5 archive. This result suggests that some models are failing to capture the atmospheric teleconnection between the tropical Pacific and Australia, and both this and a realistic representation of oceanic ENSO characteristics are required for coupled models to accurately capture the ENSO-rainfall teleconnection. These findings have implications for the study of rainfall projections in the region. © 2014, Springer-Verlag Berlin Heidelberg. 资助项目: 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/54171
Appears in Collections: 过去全球变化的重建
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作者单位: ARC Centre of Excellence for Climate System Science and Climate Change Research Centre, Level 4, Mathews Building, University of New South Wales, Sydney, NSW, Australia; ARC Centre of Excellence for Climate System Science and School of Earth Sciences, University of Melbourne, Melbourne, VIC, Australia
Recommended Citation:
King A.D.,Donat M.G.,Alexander L.V.,et al. The ENSO-Australian rainfall teleconnection in reanalysis and CMIP5[J]. Climate Dynamics,2015-01-01,44(2017-09-10)