Comment on "Robustness of proxy-based climate field reconstruction methods" by Michael E. Mann et al.
- Comment on "Robustness of proxy-based climate field reconstruction methods" by Michael E. Mann et al.
- Smerdon, Jason E.
González-Rouco, Jesús Fidel
- Lamont-Doherty Earth Observatory
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- Journal of Geophysical Research
- Mann et al. [2007a] (hereafter M07a) test the climate field reconstruction (CFR) method known as regularized expectation maximization (RegEM) using pseudoproxies derived from millennial simulations of past climate. These simulations were derived from two General Circulation Models (GCMs) driven with natural and anthropogenic forcings: the National Center for Atmospheric Research Climate System Model (CSM) [Boville et al., 2001] and the Hamburg Atmosphere-Ocean Coupled Circulation Model (ECHO-g) [Legutke and Voss, 1999]. There has been some discussion about the amplitude of millennial changes in simulations from these two GCMs [Goosse et al., 2005; Mann et al., 2005; Osborn et al., 2006; González-Rouco et al., 2006], particularly with regard to how it may impact the assessment of CFR methods in pseudoproxy experiments [Mann et al., 2005; Mann, 2007; Zorita et al., 2007; Mann et al., 2007a, 2007b].
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- Suggested Citation:
- Jason E. Smerdon, Jesús Fidel González-Rouco, Eduardo Zorita, 2008, Comment on "Robustness of proxy-based climate field reconstruction methods" by Michael E. Mann et al., Columbia University Academic Commons, https://doi.org/10.7916/D8BP0C9M.