Pattern Dynamics of Thermal-environment Effect During Urbanization:A Case Study in Shenzhen City,China  

作　　者：XIE Miaomiao WANG Yanglin FU Meichen ZHANG Dingxuan 

机构地区：[1]School of Land Science and Technology,China University of Geosciences [2]College of Urban and Environmental Sciences,Peking University

出　　处：《Chinese Geographical Science》2013年第1期101-112,共12页中国地理科学（英文版）

基　　金：Under the auspices of National Natural Science Foundation of China (No. 41101175,40635028)

摘　　要：The thermal-environment effect exists in the field of rapid urbanization. It has adverse effects on the urban atmosphere, re- gional climate, energy consumption, and public health. Shenzhen, a representative of rapidly urbanizing cities in China, was selected as a case for pattern dynamics analysis of the thermal environment. The surface temperature was acquired from the thermal infrared data of Landsat TM and ETM＋ images in 1986, 1995, and 2005 by Jim6nez-Mufioz and Sobrino＇s generalized single-channel method, which was used in assessing the distribution and spatial patterns of the thermal environment. The relative thermal environment curve （RTC） was combined with Moran＇s I analysis to assess the pattern dynamics of the thermal environment in different urbanization periods. Moran＇s I index and the RTC represent a process of aggregation-fragmentation-aggregation, which shows the aggregation pattern of a decrease during the rapid urbanization period and then an increase during the steady urbanization period. High-temperature areas gradually ex- panded to a uniform and scattered distribution in the rapid urbanization period; while the high thermal-environment effect was gradually transformed into a steady spatial pattern in the stable urbanization period. To characterize the increasing development in this multiple- center city, we chose profiles along an urban-development axis. The results suggest that heat islands have expanded from internal urban to external urban areas. Four profiles were obtained showing differences in shape due to spatial differences in the process of development.The thermal-environment effect exists in the field of rapid urbanization.It has adverse effects on the urban atmosphere,regional climate,energy consumption,and public health.Shenzhen,a representative of rapidly urbanizing cities in China,was selected as a case for pattern dynamics analysis of the thermal environment.The surface temperature was acquired from the thermal infrared data of Landsat TM and ETM+ images in 1986,1995,and 2005 by Jiménez-Mu?oz and Sobrino's generalized single-channel method,which was used in assessing the distribution and spatial patterns of the thermal environment.The relative thermal environment curve(RTC) was combined with Moran's I analysis to assess the pattern dynamics of the thermal environment in different urbanization periods.Moran's I index and the RTC represent a process of aggregation-fragmentation-aggregation,which shows the aggregation pattern of a decrease during the rapid urbanization period and then an increase during the steady urbanization period.High-temperature areas gradually expanded to a uniform and scattered distribution in the rapid urbanization period;while the high thermal-environment effect was gradually transformed into a steady spatial pattern in the stable urbanization period.To characterize the increasing development in this multiple-center city,we chose profiles along an urban-development axis.The results suggest that heat islands have expanded from internal urban to external urban areas.Four profiles were obtained showing differences in shape due to spatial differences in the process of development.

关 键 词：thermal environment spatial pattern remote sensing URBANIZATION Shenzhen City 

分 类 号：P942[天文地球—自然地理学] X16[环境科学与工程—环境科学]