title: Comment on "Atlantic and Pacific multidecadal oscillations and Northern Hemisphere temperatures".
abstract: Steinman et al. (Reports, 27 February 2015, p. 988) argue that appropriately rescaled multimodel ensemble-mean time series provide an unbiased estimate of the forced climate response in individual model simulations. However, their procedure for demonstrating the validity of this assertion is flawed, and the residual intrinsic variability so defined is in fact dominated by the actual forced response of individual models.
authors.affiliation: Department of Mathematical Sciences, Atmospheric Science group, University of Wisconsin-Milwaukee, Post Office Box 413, Milwaukee, WI 53201, USA. kravtsov@uwm.edu.
authors.forename: S
authors.initials: S
authors.lastname: Kravtsov
authors.affiliation: Department of Geological Sciences, University of Colorado, Boulder, CO, USA.
authors.forename: M G
authors.initials: MG
authors.lastname: Wyatt
authors.affiliation: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Curry
authors.affiliation: Department of Mathematical Sciences, Atmospheric Science group, University of Wisconsin-Milwaukee, Post Office Box 413, Milwaukee, WI 53201, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Tsonis
mesh_terms: D018534:Earth, Planet; D057232:Global Warming