Variation characteristics of surface temperature in Dianchi Lake Basin in recent 20 years

Abstract

The ecological environment of the earth has changed with the development of economy. These changes also have an impact on human’s life. We can know that the average annual temperature in the Dianchi Lake Basin has shown an upward trend in the past 20 years through the analysis of temperature changes in the Dianchi Lake Basin. In the four seasons, there are various degrees of sudden changes, especially in autumn, the temperature rising trend is the most significant, and there is a downward trend in winter but the downward trend is not obvious. From the analysis of monthly average temperature data, it can be seen that the temperature is rising except for April and August, and the rising trend is also obvious in October, November and December.