The analysis of climate productivity change in Aletai area

In this paper,according to the annual temperature and precipitation data from 8 meteorological stations in the Aletai area in Xinjiang during the period of 1961～2000,we calculate the change of climatic productivity in Aletai area during the past 40 years by using Tharnthwaite Memorial model.As a result,climatic productivity in Aletai area indicates a siganificant increase over the past 40 years,with an average value of 367.2 g/(m2·a).Precipitation is a limitimg factor for climatic productivity in Aletai area.