Abstract:

 Based on the daily temperature and precipitation data from 81 weather stations during 1961-2010 in the northeast China, the spatial-temporal variations of mean annual temperature and precipitation were analyzed using methods of a rotated principal component analysis (REOF) and a cluster analysis statistic test (CAST). The results show that the warming trend is significant in the northeast China, and the trend differs significantly in the different areas. The ascending trend of temperature is more obvious in the north and east regions than in the west and south regions. On the contrary, the annual precipitation is in a decreasing trend, especially in the western region of northeast China.

Key words:  CAST (cluster analysis statistic test), Mean temperature, Precipitation