D. Koutsoyiannis, Two comments on "How Red are my Proxies?" by David Ritson, Real Climate, 6 pages, doi:10.13140/RG.2.2.36778.00960, 2006.
In his commentary article and his treatise "Deriving AR1 Autocorrelation Coefficients from Tree-Ring Data" (http://www.realclimate.org/supp/nred.pdf), David Ritson explains that in his tree ring analysis he decomposed the data series into a Markovian noise and a deterministic fluctuating signal component with comparatively large excursions over multi-decadal periods. In these two comments it is maintained that this methodology is fundamentally flawed. Also, more consistent stochastic methodologies are discussed.
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