An analysis on spatial variation of

An analysis on spatial variation of urban human thermal comfort in Hangzhou,China

Abstract： Urban human thermal comfort (UHTC) is affected for interacting of weather condition and underlyingsurface framework of urban area. Urban underlying surface temperature value and Normalized Difference VegetationIndex(NDVI) were calculated using image interpreting and supervised classification technique by ERDAS IMAGEsoftware using 1991 and 1999 Landsat TM images data. Reference to the relational standard of assessing humanthermal comfort and other meteorology data of Hangzhou City in summer, air temperature and relative humidityvariation of different land types of underlying surface were inversed. By choosing discomfort index as an indictor, thespatial distribution characteristic and the spatial variation degree of UHTC were estimated and mapped on a middlescale, that is, in six districts of Hangzhou. The main characteristics of UHTC spatial variation from 1991 to 1999 wererevealed using a GIS-based calculation model. The variation mechanism were analyzed and discussed from theviewpoint of city planning, construction and environmental protection. 作 者： WANG Wei-wu    ZHU Li-zhong    WANG Ren-chao   作者单位： College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China  期 刊： 环境科学学报(英文版)  ISTICSCI   Journal： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2004, 16(2)  分类号： X16  Keywords： urban human thermal comfort (UHTC)    remote sensing (RS)    geographic information system (GIS)    spatial distribution    variation mechanism