长江流域资源与环境 >> 2014, Vol. 23 >> Issue (04): 526-.doi: 10.11870/cjlyzyyhj201404012

• 生态环境 • 上一篇    下一篇

基于HJG1B数据的武汉市LST反演及热环境分析

刘玉安,唐志勇,程 涛,易成功,锻 炼   

  1. (1. 武汉大学测绘遥感信息工程国家重点实验室,湖北 武汉 430079;2.福鼎市气象局,福建 福鼎 355200;3.广西科技大学汽车与交通学院,广西 柳州 545006;3.黄冈市气象局,湖北 黄冈 438000 
  • 出版日期:2014-04-20

LAND SURFACE TEMPERATURE RETRIEVAL AND ANALYSIS ON THE URBAN HEAT ENVIRONMENT OF WUHAN BASED ON HJ1B DATA

LIU Yuan1, TANG Zhiyong2, CHENG Tao1,3, YI Chenggong4, DUAN Lian1   

  1. (1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China; 2. Fuding Meteorological Bureau,Fuding 355200, China;  3. Automotive & Transportation Engineering Institute, Guangxi University of Science and Technology, Liuzhou 545006, China;  4. Huanggang Meteorological Bureau, Huanggang 438000, China) 
  • Online:2014-04-20

摘要:

以HJ1B CCD/IRS4为主要数据源,采用单窗算法,反演了武汉市夏季高温代表日的地表温度,并用MODIS地表温度产品对反演结果进行了验证。在此基础上,提取热场变异复合指数来分析城市热岛空间分布特征,给出了城市热岛效应的定量化描述,并就不同下垫面对热岛效应的影响进行了研究。结果如下:(1)武汉城市热岛呈现整体上交错分布而局部小聚集的不规则特点,大热岛之中存在一些温度更高的小热岛;(2)武汉市2009~2012年夏季高温日平均LST为30611 K,多数城区温度达到309~317 K;(3)主城区热场变异复合指数均超过了0015,表现为较强-极强的热岛效应;6个等级的热岛效应强度的面积比例依次下降,而对应的LST平均值则逐渐升高;(4)不同地表覆盖类型LST相差较大,其在地表类型面积构成中的比例不同。研究成果可为城市热环境监测与生态评价提供科学依据

Abstract:

In this paper,we used the monowindow algorithm to retrieve land surface temperature in Wuhan using HJ1B CCD/IRS as the main data source,and preliminarily validated the result using the MODIS temperature products. Next,thermal field variance composite index was obtained from the land surface temperature and the spatial distribution feature of Wuhan was analyzed,and the quantitative description on the urban heat island effect was given. Last,the impact of land covers types on heat island was analyzed. The conclusions are as follows:(1) The urban heat island was mostly concentrated in the urban areas and showed irregular characteristics of staggered distribution on the whole and agglomeration of some areas. There were some small islands with higher temperature in the big heat islands.(2) The average of land surface temperature on behalf of summer high temperature days from 2009 to 2012 in Wuhan city was 30611 K,land surface temperature in most urban area was 309-317 K.(3) Thermal field variation composite index in the main urban area exceeded 0015 and manifested a very strong effect of heat island. Area percentage of six intensities of heat island effect declined from 3671% to 352% in turn,but the corresponding average land surface temperature increased from 29898 K to 3152 K. Heat island intensities and the mean value of the land surface temperature went up simultaneously. (4) Heat island intensity level differed by the type of surface area. In terms of land cover composition,the proportion of water decreased,the proportion of vegetation increased and then decreased,while the proportion of impervious surface had gradually increased.The results can provide a scientific basis for monitoring and ecological evaluation of the urban thermal environment

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