The Research on Calculation of Land Surface Temperature on the Ordos Plateau and the Surroundings
The land surface temperature of the Ordos Plateau and the surrounding areas is calculated with NOAA-AVHRR data by means of a split-window method. In this method,the surface emissivity is computed first from the brightness temperature of Channels 3,4 and 5,then in conjunction with the emissivity and the brightness temperature of Channels 4 and 5 the land surface temperature is derived. The comparison between the computed results and the observations of local stations at about the same time indicates that the difference is about 80% within 1℃ in the nighttime,but only 67% in the daytime. The maximum difference is - 3.8 C. As a macro-monitoring measure, this method is acceptable in estimating land surface temperature.