Journal
REMOTE SENSING OF ENVIRONMENT
Volume 115, Issue 7, Pages 1772-1780Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.rse.2011.03.008
Keywords
Land surface temperature; Thermal sharpening; Urban heat island; Urban meteorology
Funding
- NASA, University of Puerto Rico
- NASA
- U.S. National Oceanic and Atmospheric Administration Cooperative Research Center of City College of New York City
- NASA's Global Hydrology and Climate Center, Huntsville, Alabama
- NSF
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0847054] Funding Source: National Science Foundation
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A high resolution urban thermal sharpener (HUTS) was developed that increases the resolution of thermal infrared (TIR) data to that of visible and near infrared (VNIR) data by fitting the relationship between radiometric surface temperature, normalized difference vegetation index (NDVI) and surface albedo (a). HUTS was applied to TIR data aggregated to 90 m to represent a satellite acquired dataset and validated against the measured 10 m data from an aircraft over San Juan, Puerto Rico. HUTS sharpening reduced the root mean square error of surface temperature at the high resolution by 17% compared to no sharpening and outperformed other sharpening methods. HUTS is proposed as a useful tool to study urban meteorology and climatology at the microscale using ASTER satellite data. (C) 2011 Elsevier Inc. All rights reserved.
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