Groveman, B. S., and H. E. Landsberg (1979), Simulated Northern Hemisphere Temperature Departures 1579-1880, Geophys. Res. Lett., 6(10), 767–769.
Abstract
Using a short-cut method to estimate Northern Hemisphere temperature and a calibration period from 1881-1975, a number of long instrumental temperature series and some time series of proxy data were used to reconstruct approximate annual temperature departures from the 1881-1975 average for the interval 1579-1880.
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Related Climate Audit posts
Groveman and Landsberg - A post discussing the mischaracterization of Mann, Bradley & Hughes (1998) study as "the first systematic, statistically based synthesis of multiple climate proxies".
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