Analysis of the Change Characteristic of Critical Temperature in Xining
This paper analyzes and studies the variation trend of the initial and final days of critical temperature and the duration of days during the critical temperature period,the correlation between the initial and final days of critical temperature and the duration of days during the critical temperature period and annual average temperature,and the variation trend of acumulated temperature during the critical temperature period in the past 59 years from 1960 to 2018 in Xining City,Qinghai Province,and draws the following conclusions.(1)The initial day of critical temperature showed a tendency to advance overall,and its final day showed a tendency to delay overall,which showed the days of critical temperature increased with the rising of temperature.According to the variation of the initial and final days of each critical temperature,it showed a tendency to warm in spring and autumn in Xining overall.(2)As temperature rose,and the days between the initial day and final day of critical temperature increased.(3)Through the analysis of the effective accumulated temperature and the active accumulated temperature,and according to the variation of the climate inclination rate,it can be seen that the warming of Datong was the most obvious,followed by Huangzhong,and Huangyuan was the lowest.
Ctitical temperatureTrend analysisChange characteristicEffective accumulated temperatureActivity accumulated temperature
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