Evaluation of Land Surface Temperature Retrieved from MODIS Data

Abstract:

Land surface temperature (LST) is important factor in global climate change studies, radiation budgets estimating, city heat and others. In this paper, land surface temperature of Guangzhou metropolis was retrieved from two MODIS imageries obtained at night and during the day respectively. Firstly, pixel values were calibrated to spectral radiances according to parameters from header files. Then, the brightness temperature was calculated using Planck function. Finally, The brightness temperature retrieval maps were projected and output. Comparing two brightness temperature retrieval maps, it is concluded that the brightness temperature retrieval are more accurate at night than during the day. Comparing the profile line of brightness temperature from north to south, the brightness temperature increases from north to south. Temperature different from north to south is larger at night than during the day. The average temperature nears 18°C at night and the average temperature nears 26°C during the day, which is consistent with the surface temperature observed by automatic weather stations.

• Periodical: Advanced Materials Research (Volumes 785-786)
• Pages: 1333-1336
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.785-786.1333
• Online since: September 2013
• Authors: Xiao Feng Yang, Xing Ping Wen
• Keywords: Land Surface Temperature, MODIS, Remote Sensing

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