ANALYSIS OF SPATIAL AND TEMPERATURE CHARACTERISTICS OF TEMPERATURE IN SANJIANGYUAN REGION FROM 1961 TO 2020
In order to study the characteristics of temperature change and the mechanism of temperature rise in the Sanjiangyuan region,the characteristics and abrupt changes of temperature change were analyzed and tested by moving average,interpolation method and sliding t test based on the temperature data of 14 meteorological stations in the Sanjiangyuan region from 1961 to 2020.The results showed that the annual and seasonal temperatures in the three source regions have experienced multiple cold and warm fluctuations,and the overall trend was significantly warming.The warming amplitudes of the Yangtze River,the Yellow River and the Lancang River source region were 0.37℃/10a,0.30℃/10a and 0.38℃/10a,respectively,and the Lancang River source region had the largest warming amplitude.The temperature rise was the largest in winter,followed by autumn,and the smallest rise in spring.The source of the Yangtze River to Jiuzhi area,the source of the Yellow River to Maduo area,the source of the Lancang River to Nangqian area were the warming center,which showed gradually increasing trend from west to east and north to south.In the rising trend of temperature,there were mutations in the three source regions.The source region of the Yangtze River occurred in 2004,and the source regions of the Yellow River and Lancang River occurred in 1997.The differences in altitude and underlying surface were the main reasons for the different warming rates.
NETL
NSTL
万方数据
