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anthropogenic climate change or natural variability, as instrumental records for ENSO cover at most 150 yr. In the Australian region, declines in rainfall have been observed in recent decades in southwest Western Australia, southeastern Australia, and parts of the eastern seaboard (e.g., Cai and Cowan 2006 ; Nicholls 2009 ; Cai et al. 2010 ; Gergis et al. 2011 ). It is also difficult to assess from short (100 yr) Australian rainfall records whether these declines, particularly in the ENSO
anthropogenic climate change or natural variability, as instrumental records for ENSO cover at most 150 yr. In the Australian region, declines in rainfall have been observed in recent decades in southwest Western Australia, southeastern Australia, and parts of the eastern seaboard (e.g., Cai and Cowan 2006 ; Nicholls 2009 ; Cai et al. 2010 ; Gergis et al. 2011 ). It is also difficult to assess from short (100 yr) Australian rainfall records whether these declines, particularly in the ENSO
