Analysis on the Characteristics of Climate Change in the Surrounding Area of Qinghai Lake in Recent 47 Years

[Objective] The aim was to study the characteristics of climate change in the surrounding area of Qinghai Lake.[Method] Based on the data of temperature,precipitation and sunshine hours from 5 representative meteorological stations in the surrounding area of Qinghai Lake during 1961-2007,the annual,seasonal and decadal variation of meteorological factors were analyzed.[Result] In recent 47 years,temperature showed obvious increase trend in the surrounding area of Qinghai Lake,and annual average temperature increased with the climatic tendency of ≥0.30 ℃/10 a,while there was more significant increase in annual average minimum temperature than annual average maximum temperature;annual mean precipitation decreased with the climatic of-3.67 mm/10 a,and precipitation in spring and autumn reduced obviously,while precipitation in summer and winter increased slightly;annual sunshine hours also showed decrease trend with the climatic tendency of-1.79 h/10 a,while the decreasing trend of sunshine hours was most obviously in summer,and next came winter,while there was no obvious increase in spring and autumn.[Conclusion] The study could provide theoretical references for the effective prevention of meteorological disasters in the surrounding area of Qinghai Lake