Study of the Applicability of Climatic Seasonal Division in Guizhou Province

This paper is based on the daily climate standard value (1981 ~ 2010) and the average temperature data (1st January, 1980 ~ 31st May, 2014) of 84 meteorological stations in Guizhou province. The standard of Climatic Seasonal Division (QX/T 152-2012), formulated by China Meteorological Administration 1st November, 2012), is used to investigated the climatic season division in Guizhou. The conclusions follow as: Guizhou province can be divided into no summer zone, no winter zone and four seasons zone. No summer zone is mainly in the west of Guizhou, while no winter zone is in the southwest. The normal spring and summer start in the southwest, then the rest areas of Guizhou province. The normal autumn and winter start in the northwest, then the rest areas of Guizhou province. The result of climatic season division shows: the starting time of spring and summer are earlier than the starting time of others; the starting time of seasons obeys normal distribution law, except the starting time of autumn. According to the analysis of the reason of the abnormally starting time, we discover that the temperature variability is notable between two seasons, the variability of seasonal temperature is strong. The main reason of the early starting time of spring, summer and autumn of Climatic Seasonal Division is the earliest threshold of starting date in judging the beginning date of the annual season. In conclusion, Climatic Seasonal Division is rational and applicable for the normal climatic season division in Guizhou, but there is no suitable standard of Climatic Season Division for the current year because of the irrational of the judgment of the start time.