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  • Australasian climate over the last 2,000 years: The PAGES AUS2K synthesis x
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Steven J. Phipps, Helen V. McGregor, Joëlle Gergis, Ailie J. E. Gallant, Raphael Neukom, Samantha Stevenson, Duncan Ackerley, Josephine R. Brown, Matt J. Fischer, and Tas D. van Ommen

1850–2006 CE. A version of the “error in variables” method (EIV or “total least squares”; Hegerl et al. 2007a ) based on the regularized expectation–maximization algorithm (RegEM; Schneider 2001 ) was used to regress the proxies against the instrumental target. Hemispheric-mean surface air temperature was reconstructed for the Northern Hemisphere for the period 300–2006 CE and for the Southern Hemisphere for the period 400–2006 CE. A decadal filter was applied to the final reconstructions, to

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