Abstract:

To identify the impact of human on trends of temperature variation and achieve the objective results of global warming, the temperature data in Xifeng from 1952 to 2009, in Huanxian and Pingliang from 1968 to 2009 had been used. We identified 1997 as start point of obvious urbanization in Xifeng and analyzed the climate tendency coefficient and trend rate of linear regression equation. The results showed that the rising trends of annual mean temperature and annual mean minimum temperature warming in Xifeng were more obvious than in Pingliang and Huanxian. There was no consistency of average maximum temperature in Xifeng and Pingliang, Huanxian from the northern to southern, linear trend rate of average temperature of Xifeng was 0.051℃/10 a above than Pingliang’s and 0.111℃/10 a above than Huanxian. The linear trend rate of average minimum temperature of Xifeng was 0.279℃/10 a above than Pingliang’s and 0.478℃/10 a above than Huanxian’s. As for the linear trend rate of maximum temperature, the impact of urbanization was more obvious in Xifeng than Huanxian, and there was no significant difference between Xifeng and Pingliang.Key words: observation environment; urbanization; temperature; Homogeneity; affect