Relationship between temperature transformation and urbanization development of Guangzhou

On the basis of temperature datis from 1953 to 2009 of Guangzhou,using the Cubic function fitting and linear fitting method,the characteristics of the temperature change was comparatively analyzed.Based on this,urbanization indicator data from 1999 to 2007 of Guangzhou were preliminarily analyzed with the principal component analysis to research the relationship between the development of urbanization and the average temperature transformation.The results showed that the changing rate of the average temperatures was 0.38 ℃·10a-1,which had increased remarkably with the development urbanization effects in Guangzhou in recent 30 years.The change rate of extreme maximum temperature had increased significantly,and the change rate of extreme minimum temperature had significant fluctuation which was more from the influence of urbanization.The increasing of the monthly average temperature,the monthly average maximum temperature and the monthly average minimum temperature in winter and autumn produced greater contributions to the climate warming of Guangzhou.The life style of urbanization,the nature or the structure changing of underlying surface,and the level of population urbanization were the dominant factors which influenced the change of the average temperature of Guangzhou.The correlative coefficients between these main urbanization factors and the average temperature respectively reached 0.867,0.891,0.996.