Impact Factor:11.1
DOI number:10.1016/j.rse.2024.114442
Journal:Remote Sensing of Environment
Key Words:Urban surface-emitted longwave radiation， Urban-oriented hybrid (UoHy) method， High spatial resolution image， Thermal infrared
Abstract:Accurate estimation of the surface-emitted longwave radiation (SELR) has important scientific value in understanding its spatiotemporal dynamics and surface thermal environment. Thermal infrared (TIR) images with high spatial resolution offer enhanced data support for studying SELR of complex surfaces, such as urban surface. This study proposes a new urban-oriented hybrid (UoHy) method, which considers multiple scattering and adjacent effects of urban pixel using the term sky view factor, to estimate urban SELR from the top-of-atmosphere radiance of TIR images with high spatial resolution, and performs sensitivity analysis and application. The experimental results for the thermal images of GF-5/VIMS as an example showed that the UoHy method has relatively high accuracy, and obtains SELR errors of less than 12.0 W/m2 under low atmospheric water vapor conditions and less than 17.0 W/m2 under high atmospheric water vapor conditions. The application of the method during daytime and nighttime also demonstrated the method’s validity and effectiveness. Compared with the natural surface-oriented hybrid method, the UoHy method obtains an improvement of about 7.0–10.0 W/m2 in SELR estimation, which indicates that it has the potential for practical SELR estimation over urban surface with TIR images of high spatial resolution.
Indexed by:Journal paper
Document Code:114442
Discipline:Natural Science
First-Level Discipline:Geography
Document Type:J
Volume:315
Translation or Not:no
Included Journals:SCI
Links to published journals:https://www.sciencedirect.com/science/article/pii/S0034425724004681?via%3Dihub
First Author:Songyi Lin
Correspondence Author:Huazhong Ren
All the Authors:Rongyuan Liu,Jinxiang Li,Shanshan Chen,Yuanjian Teng,Wenjie Fan,Baozhen Wang,Yu Liu
Date of Publication:2024-09-21