Variation of temperature and precipitation in the Aksu River Basin in recent 46 years

The changes of mean temperature and precipitation at 6 meteorological stations in Aksu River Valley in recent 46 years were analyzed by using linear regression and abrupt change analysis.The results are as follows: ①The annual mean temperature is gradually increased at a climatic tendency of 0.18℃/10a,and the warming trend is significant,especially in winter.②The decadal annual precipitation in the river basin is increased by 13.1mm;③The mean annual temperature and the precipitation in the river basin have been sharply increased since 1993 and 1987 respectively.The mean temperature in autumn and winter occurred the abrupt change,while the precipitation in summer and winter occurred the abrupt change.④There are obvious periodic oscillation of 12-16a and 8-12a for the annual precipitation variation in the Aksu river basin.