楚雄市城市气候特征分析——兼谈中国主要城市热岛强度对比分析

利用云南省楚雄市气象观测站1959～2000年资料与其郊区南华气象观测站资料进行比较，并用小波分析等方法，通过与北京、上海等大城市热岛强度进行对比分析，找出了我国不同城市热岛强度分布特征，发现楚雄市热岛强度的年变化和日变化规律。结果表明，进入20世纪80年代以来，楚雄市热岛效应日趋明显，呈明显的季节性，其变化规律与北京、上海等大城市既有相似之处也有不同之处，不同区域背景对城市热岛效应有一定影响。随着楚雄城市的发展，城区的绝对湿度和相对湿度逐渐减少，“干岛效应”呈增强的趋势。

The Analysis of the Urban Climate in Chuxiong of Yunnan: Comparison of Urban Heat Island Effect in China

Chuxiong is a medium-sized city on the Yunnan-Guizhou Plateau. The data (1959-2000) of Chuxiong and Nanhua observatories of Yunnan are compared in this paper. By Mexh wavelet analysis and comparison of the heat island effect of Chuxiong with Shanghai etc., the intensity of heat island for different cities has been examined. At the same time, the law for the annual and daily intensities of heat island in Chuxiong city has been found. The results indicate that the urban heat island effect of Chuxiong has become more and more obvious since the 1980s, with evident seasonal variations. The different variation laws are summarized by comparing the heat island effect of Chuxiong with Shanghai etc. The heat island effect is influenced by different backgrounds. It is revealed that with urban expansion of Chuxiong, the relative humidity and absolute humidity in Chuxiong have gradually reduced, and the effect of dry island has gradually appeared. The trend of dry island is intensifying in Chuxiong.