摘要
运用热红外技术监测地表温度已获得成熟的发展,城市化进程的加快使得城市热岛效应日益显现,有关城市典型地物热辐射特性的研究对于分析城市热岛现象的成因和分布具有重要意义。本文通过对保定市地面实测数据的研究发现,地物类型、观测时间和墙面朝向是影响城市典型地物热辐射亮度温度的主要因素。结果显示,地物类型的不同显著影响其亮度温度,但仍存在同谱异物现象;不同时间观测到的地物热辐射强度不同,且在很大程度上影响其在各通道上的亮温差异;不同朝向墙面的亮温也有差异,且这种差异随观测时间而改变。对城市典型地物热辐射特性的研究具有理论和实践意义,为热红外遥感监测城市热岛效应提供了依据。
The use of thermal infrared technology to monitor the land surface temperature h as received mature development,and the acceleration of urbanization makes the u rban heat effect emerge,thus,studies of the thermal radiation characteristics of urban typical surface features make great significance for the analysis of th e causes and distribution of the thermal phenomenon.Based on the study of groun d measured data of Baoding city,we have found that,the feature types,the obse rvation time and wall orientations are principal factors that exert an influence on the thermal radiation brightness temperature of urban typical surface featur es.The results show that different types of surface features will significantly affect the brightness temperature,but ＂different things with the same spectru m ＂ still exists;the observation time has direct impact on the intensity of ther ma l radiation and to a large extent on the brightness temperature difference of ea ch channel;the brightness temperature of different wall orientations are also d ifferent,and the difference changes with the change in observation time.Stud ies of thermal radiation characteristics of urban typical surface features have theoretical and practical significance,providing basis for thermal infrared rem ote sensing to monitor the urban heat effect.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第1期92-95,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(40971190
40771153)
国家重点基础研究发展(973计划))项目(2009CB426305)资助
关键词
城市热岛
热辐射
亮度温度
红外辐射计
Urban heat island
Thermal radiation
Brightness temperature
Infrared radiomete r
作者简介
张霞，女，1985年生，东北师范大学城市与环境科学学院博斗：研究生email：zhangx396@nenu．edu．cn
通讯联系人e-mail：zhaoys975@nenu．edu．cn
