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Jalan, S.; Sharma, K. (2014)
Languages: English
Types: Article
Urban Heat Island (UHI) refers to the phenomena of higher surface temperature occurring in urban areas as compared to the surrounding countryside attributable to urbanization. Spatio-temporal changes in UHI can be quantified through Land Surface Temperature (LST) derived from satellite imageries. Spatial variations in LST occur due to complexity of land surface – combination of impervious surface materials, vegetation, exposed soils as well as water surfaces. Jaipur city has observed rapid urbanization over the last decade. Due to rising population pressure the city has expanded considerably in areal extent and has also observed substantial land use/land cover (LULC) changes. The paper aims to determine changes in the LST and UHI phenomena for Jaipur city over the period from 2000 to 2011 and analyzes the spatial distribution and temporal variation of LST in context of changes in LULC. Landsat 7 ETM+ (2000) and Landsat 5 TM (2011) images of summer season have been used. Results reveal that Jaipur city has witnessed considerable growth in built up area at the cost of greener patches over the last decade, which has had clear impact on variation in LST. There has been an average rise of 2.99 °C in overall summer temperature. New suburbs of the city record 2° to 4 °C increase in LST. LST change is inversely related to change in vegetation cover and positively related to extent of built up area. The study concludes that UHI of Jaipur city has intensified and extended over new areas.
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    • Chen, X. L., Wang, Q., Zheng, J. and Xiaobin, L., 2002. A study on urban thermal field in summer based on satellite remote sensing. Remote Sensing for Land and Resources, 4, pp. 55-59.
    • Chen, X.L., Zhao, H.M., Li, P.X. and Yin, Z. Y., 2006. Remote sensing image-based analysis of the relation between urban heat island and land use /land cover changes. Remote Sensing of Environment, 104, pp. 133-146.
    • Dai, X., Zhongyang, G., Zhang, L. and Li, D., 2010. Spatiotemporal exploratory analysis of urban surface temperature field Kim, Y. H. and Baik, J. J., 2002. Maximum Urban Heat Island Intensity in Seoul. Journal of Applied Meteorology, 41, pp. 651- 653.
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