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城市热环境及其变化与城市发展关系密切,热力环境的时空变化在一定程度上反映了城市发展的空间变化格局。通过构建热力重心转移距离、热力重心转移角度以及热力重心转移贡献率3个指数,计算3个不阶段广州市城市热环境的时空变化格局。结果表明,广州市1990～2005年高温地区的热力重心一直向南迁移。城市热力重心的转移路径与城市内部各地区在不同时期的发展及扩张具有一定的关系。
The urban thermal environment and its changes are closely related to the urban development. The temporal and spatial changes of the thermal environment reflect, to some extent, the spatial variation of urban development. Through the construction of three indexes of the transfer distance of the center of gravity of the thermal gravity, the angle of the thermal gravity center and the contribution rate of the transfer of the center of gravity of the thermal energy, the space-time variation pattern of the urban thermal environment in Guangzhou in three stages is calculated. The results show that the thermal gravity center of Guangzhou in the hot area from 1990 to 2005 has been migrating southward. The transfer path of urban heat center of gravity has a certain relationship with the development and expansion of different regions within the city in different periods.