The Preliminary Study in Reconstructing the Mean Winter Temperature in Kunming during 1721-1900 A.D
Yang Yuda (Center for Historical Geography, Fudan Universty, Shanghai, 200433)
This study reconstructed the series of mean winter temperature and set up the equation of bi-determiner about the snowing in winter and the precipitation during dry seasons with historical documents during 1721-1900, at the same time reconstructed the decade series of mean winter temperature with other materials during 1856-1900. The analysis showed that there was a cold period in Kunming with some intervals during the 18th-19th century, this time could be divided into 4 cold periods and 3 warmer periods approximately. There existed the spring changing of temperature in Kunming. It could be found that the changing in temperature in Kunming was consistent with other areas of China by compare, while there were many diversities.