Journal article

Nonstationary Australasian Teleconnections and Implications for Paleoclimate Reconstructions

Ailie JE Gallant, Steven J Phipps, David J Karoly, A Brett Mullan, Andrew M Lorrey

Journal of Climate | American Meteorological Society | Published : 2013

Abstract

The stationarity of relationships between local and remote climates is a necessary, yet implicit, assumption underlying many paleoclimate reconstructions. However, the assumption is tenuous for many seasonal relationships between interannual variations in the El Niño–Southern Oscillation (ENSO) and the southern annular mode (SAM) and Australasian precipitation and mean temperatures. Nonstationary statistical relationships between local and remote climates on the 31–71-yr time scale, defined as a change in their strength and/or phase outside that expected from local climate noise, are detected on near-centennial time scales from instrumental data, climate model simulations, and paleoclimate p..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council


Awarded by ARC Centre of Excellence for Climate System Science


Funding Acknowledgements

Funding for this research comes in part from the Australian Research Council (Grants FF0668679 and DP1092945) and the ARC Centre of Excellence for Climate System Science (Grant CE110001028). ABM and AML are supported by the NIWA core-funded project "Climate Present and Past." Thank you to NIWA for providing the New Zealand temperature and precipitation records and to Georgina Griffiths, Joelle Gergis, Tas van Ommen, Stewart Allen, and three anonymous reviewers for their useful discussion and constructive comments. We thank NOAA for supporting the production of this special issue of Journal of Climate.