Temperature Variation over the Past 2,000 years in China

Working with the 200 different phenological cold/ warm records of phenomena and crop distribution extracted from a number of historical documents about places geographically located at latitudes 27°-40°N and longitudes 107°-120°E, the winter half-year temperature (October to April) for the past 2,000 years at 10-30 years' time resolution in the central region of eastern China was reconstructed (See Figure 1; Ge et al, 2003), and the climatic periodicity was detected (Ge et al, 2004).