Paper Info
Title
Impact of 3-D Structures and Their Radiation on Thermal Infrared Measurements in Urban Areas
Abstract
Land surface temperature (LST) is a key parameter for many fields of study. Currently, LST retrieved from satellite thermal infrared (TIR) measurements is attainable with an accuracy of about 1 K for most natural flat surfaces. However, over urban areas, TIR measurements are influenced by 3-D structures and their radiation that could degrade the performance of existing LST retrieval algorithms. Therefore, quantitative models are needed to investigate such impact. Current 3-D radiative transfer models are generally based on time-consuming numerical integrations whose solutions are not analytical, and are therefore difficult to exploit in the methods of physical retrieval of LST in urban areas. This article proposes an analytical TIR radiative transfer model over urban (ATIMOU) areas that considers the impact of 3-D structures and their radiation. The magnitude of this impact on TIR measurements is investigated in detail, using ATIMOU, under various conditions. Simulations show that failure to acknowledge this impact can potentially introduce a 1.87-K bias to the ground brightness temperature for street canyon whose ratio “wall height/road width” is 2, wall and road temperature is 300 K, wall emissivity is 0.906, and road emissivity is 0.950. This bias reaches 4.60 K if road emissivity decreases to 0.921, and road temperature decreases to 260 K. ATIMOU is also compared to the discrete anisotropic radiative transfer (DART) model. Small mean absolute error of 0.10 K was found between the models regarding the simulated ground brightness temperatures, indicating that ATIMOU is in good agreement with DART.
Year
DOI
Venue
2020
10.1109/TGRS.2020.2987880
IEEE Transactions on Geoscience and Remote Sensing
Keywords
DocType
Volume
3-D,land surface temperature (LST),radiative transfer,thermal infrared (TIR),urban areas
Journal
58
Issue
ISSN
Citations 
12
0196-2892
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Xiao Po Zheng102.03
Maofang Gao216.16
Zhao-Liang Li3416127.21
Kun-Shan Chen4976148.62
Xia Zhang501.35
Guofei Shang602.37