Based on monthly data of air temperature, precipitation, maximum and minimum air temperature, duration of sunshine, the features of climatic change in the source regions of the Yangtze and Yellow Rivers are analyzed comprehensively over the last 40 years, and the climate changes in the source regions of the Yangtze and Yellow Rivers are compared with that in the Tibetan Plateau, in whole China and in the globe. It is found that air temperature in the regions as a whole has a rising trend in the recent 40 ye...