A Russian group, under the initial leadership of M. I. Budyko, has produced the first comprehensive analysis of monthly average surface temperature (January 1891 through May 1980) for the Northern Hemisphere on a 5°×10° latitude-longitude grid. This data set and the magnetic tape of the data are described. Other collections of surface temperature data are also described and compared on the bases of temporal and spatial coverage, and analysis methods.
Alan Robock (Wed,) studied this question.