Characteristics of climate chang and future trend in the upper Yellow River basin from 1960 to 2008
Using monthly mean temperature and monthly mean precipitation data from 25 weather stations in the upper Yellow River from 1960 to 2008, climatic linear trend, moving average, accum ulated variance and R/ S analysis methods were used to study the climatic changing trend. The main findings were summarized as follows ： （ 1 ） Annual and seasond temperatures presented different degree of increasing trend, since the nineties of the 20th century it was more obvious, and with the trend of the most prominent winter heating in upper Yellow River from 1960 to 2008. （2） Precipitation was more in the 1960s, then gradually reduced, since 2000 it was significantly increased, and there existed significant difference change trend of the four seasons. In spring and summer precipitation changes were less, autumn showed decreasing trends, winter showed increasing trend but there were not statistically significant. （3） Compared with the previous studies, we found temperatures was increasing, precipitation showed reduceing trendy. On this basis, using the R/S analysis the climate trend forecast results showed that temperature and .precipitation. has obvious Hurst phenomenon, and the future climate change trend is same with the past 49 years.
NETL
NSTL
万方数据
维普
