Highly variable Northern Hemisphere temperatures reconstructed from low- and high-resolution proxy data
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...Introduction The greatest progress in understanding Holocene climate change and variability has consistently been made by comparison Since 1990, global mean temperatures have probably been higher than at any previous time during the last 1000 years (Mann et al., 1999; Crowley, 2000; Esper et al., 2002; Jones and Mann, 2004; Moberg et al., 2005; Osborn and Briffa, 2006)....
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...…and variability has consistently been made by comparison Since 1990, global mean temperatures have probably been higher than at any previous time during the last 1000 years (Mann et al., 1999; Crowley, 2000; Esper et al., 2002; Jones and Mann, 2004; Moberg et al., 2005; Osborn and Briffa, 2006)....
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Cites background or methods from "Highly variable Northern Hemisphere..."
...For both methods, we perform reconstructions both with and without dendroclimatic proxies to address any potential sensitivity of our conclusions to issues that have been raised with regard to the reliability of tree-ring data on multicentury time scales (4, 11, 16, 19, 33, 34)....
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...Because this conclusion extends to the past 1,300 years for EIV reconstructions withholding all tree-ring data, and because non-tree-ring proxy records are generally treated in the literature as being free of limitations in recording millennial scale variability (11), the conclusion that recent NH warmth likely** exceeds that of at least the past 1,300 years thus appears reasonably robust....
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...(11) reconstruction is cooler over the interval A....
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...Variants on this approach have used proxies selected specifically for their retention of low-frequency variability (9, 19) or have included low-resolution (decadal- or centennial-scale) proxies that might be well suited to reconstructing low-frequency climate variability (11) but which are consequently difficult to calibrate robustly against the instrumental record (20)....
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"Highly variable Northern Hemisphere..." refers methods in this paper
...Here we reconstruct Northern Hemisphere temperatures for the past 2,000 years by combining low-resolution proxies with tree-ring data, using a wavelet transform techniqu...
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