An Analysis of Temperature Variations Using Remote Sensing Approach in Lokoja Area

Résumé fourni par la source

This study investigates the thermal variations of the different land use/cover types in urban Lokoja town retrieved from Landsat TM imagery of 1987. Band 2, 3, 4 and 6 of the imagery were used in the classification, estimation of NDVI, land surface emissivity values, and satellite sensor temperature. The Qin et al’s mono window algorithm was employed to obtain the land surface temperatures of the different land use/cover types classified. The results indicate that there is a significant variation in temperatures among the different land use/cover types in Lokoja. The built up area and the vacant area have the highest land surface temperatures of 59.5 o C and 58.5 o C respectively, while vegetation, water bodies and cultivated land have the least with 26.5 o C, 28.5 o C and 34 o C respectively with the urban/suburban temperature difference reaching 29.3 o C This suggests that anthropogenic activity is the major factor responsible for variations in the micro climate and vegetation a regulatory cooling feature of the ecosystem. This novel approach will limit the problems associated with data generated through the in situ measurement.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.