基于定量遥感的石家庄市域热环境变化分析  

Recent Changes of the Land Surface Temperature in Shijiazhuan City,Hebei Province

作　　者：宋宜昊[1,2,3] 贾宝全[1,2,3] 姜楠[1,2,3] 

机构地区：[1]中国林业科学研究院林业研究所,北京100091 [2]国家林业局林木培育重点实验室,北京100091 [3]国家林业局城市森林研究中心,北京100091

出　　处：《干旱区研究》2014年第6期1132-1140,共9页Arid Zone Research

基　　金：国家林业公益性行业科研专项(201404301);国家科技部"十二五"科技支撑项目(2011BAD38B03)

摘　　要：基于影像的反演算法,以2004年8月30日和2010年8月15日石家庄市域的TM卫星影像数据为基础,在几何校正、辐射校正和大气校正之后,利用其第6波段数据反演了全市域的热场状况,并利用相对亮温对全市域和不同生态分区的热场变化进行了定量分析。结果表明:2004—2010年,市域热场在空间分布上呈现了两大两小的特点,一方面,市区范围内和平山县沿滹沱河河谷一带的热场强度有所增加;另一方面,市域的西南角赞皇县、灵寿县与行唐县的北部丘陵地区,热场强度呈减小趋势。相对亮温统计结果表明,全市域的热场强度主要以绿岛和弱热岛为主,二者在2004年和2010年占全市面积的92.33%和88.24%。总体看来,热场强度有所增加。对不同生态区的分析结果表明,西部山区和中部丘陵生态经济林涵养区的变化最为显著,均呈强热岛和极强热岛增加的特点。从热场变化的原因分析,除了全球气候变暖的影响与区域土地利用/覆盖变化外,城建区面积的不断扩张、全社会固定资产投资和房地产投资的迅猛增长,也是引起市域热场(尤其是城市热岛效应)增强的重要原因。Using the image-based retrieval the land surface temperature （LST） and relative brightness tempera- ture were obtained from Landsat TM thermal-infrared datasets after geometric rectification, radiometric correction and atmospheric correction were applied on the Landsant TM imagine, which were taken from 30 August 2004 to 15 August 2010 in Shijiazhuang. Based on the datasets, we analyzed the spatial distribution and changes of LST in the scale of the city area and different eco-regions. The spatial distribution of LST presented increase and decrease trends across the city. The LST presented an increase trend in the city area and along the Hutuo river valley and a decrease trend in the hilly areas in Zanhuang, Lingshou and Xingtang counties from 2004 to 2010. From the per- spective of relative brightness temperature, the heat fields of the city were constituted by green islands and slight heat islands, which accounted for 92.33% and 88.24% of the area in the study period. In general, the heat field intensity was getting higher but presented different characteristics in different eco-regions with apparent increases in the western hilly area. Except for the global warming, the change of the land use and the decreased vegetation cov- erage, the expanding of the city area, the fixed assets investment and the real estate development all contributed to the increase of the heat field intensity.

关 键 词：定量遥感 TM卫星影像 热环境 相对亮温 城市热岛效应 石家庄 

分 类 号：X16[环境科学与工程—环境科学] X87