Abstract:
Based on daily precipitation and daily weather phenomena data from national meteorological center, snowfall divisions in northeast China during recent 46 years were analyzed by rotated empirical orthogonal function (REOF) and correlation analysis, and spatial-temporal distribution and evolvement characteristics as well as climatic trend of snowfall were discussed. The results show that the primary snowfall region is located in mountain areas of northeast China. There is less snowfall in plain and in the south of plain. The regional difference of snowfall is obvious. Snowfall increases (decreases) obviously in the north of Daxing’anling mountain area (Changbai mountain area), followed in Xiaoxing’anling mountain area (plain area). Snowfall shows an increasing trend in the north of northeast China, and there is an abrupt change since 1990s. The increasing trend of annual snowfall is significant until now. However, annual snowfall decreases in the south of northeast China.