Assessment of Land surface Temperature of Kolkata Urban Agglomeration, West Bengal, India

Kolkata Urban Agglomeration is one of the third largest urban agglomeration as well as third largest rapidly urbanizing, oldest and densely populated city in India. Due to urbanization and industrialization, the number of built-up areas are increasing and replacing the vegetation and land cover area. As urbanization is known as one of the most contributing factors for urban warming, so it is necessary to express the pattern of urban warming and degradation of land vegetation. Remote sensing and GIS with statistical procedure have enabled continuous monitoring land surface temperature (LST) and its correlation to land use and land cover change (LULCC). Landsat image creates an opportunity to study land surface temperature. This study to estimate LST through thermal bands (10 & 11) with Normalized Difference Vegetation Index (NDVI) using Landsat 8 (OLI / TIRS) satellite data through ArcGIS software. Mean LST varied from 30.23°C to 27.65°C A weakly positive correlation was observed between NDVI and LST (R2 = 0.0159). It is found that the correlations between Land Surface Temperature (LST) and Normalized Difference Vegetation Index (NDVI) depend on the time of season and day. The correlation between NDVI and LST for winter is positive, but summer is negative. The combined knowledge of LST and NDVI is necessary for understanding eco-environmental change and human– environmental interactions