ABSTRACT

Urban development has consequently given rise to the empirically observed phenomenon of the urban heat island (UHI). The article aims to determine the change in land surface temperature (LST) over Jaipur study area during the period from 2008 to 2011 and analyzes the spatial variation of LST in the context of changes in land use/land cover (LU-LC). The LST has been retrieved from Moderate Resolution Imaging Spectroradiometer (MODIS) images for the years 2008 and 2011 to find the variation of LST as per the LU-LC classes. Results show a significant rise in temperature for all LU-LC categories during the study period. The percentage impervious surface area (ISA) pattern of these classes has also been analyzed for both the years, and a rising trend in ISA for different LU-LC categories has been observed; showing that Jaipur city has witnessed substantial growth in built-up area at the cost of greener patches and open land at a fast pace having a clear impact on LST variation. The average rise in temperature during winter season was found to be around 2.6 °C while 1.47 °C rise was observed during summers. Inter-seasonal variations of LST on different LU-LC over Jaipur have been analyzed.

摘要

因此，城市发展引起了根据经验观察到的城市热岛（UHI）现象。本文旨在确定斋浦尔研究区域在2008年至2011年期间的地表温度（LST）变化，并在土地利用/土地覆被变化（LU-LC）的背景下分析LST的空间变化。从2008年和2011年的中等分辨率成像光谱仪（MODIS）图像中检索了LST，以根据LU-LC类找到LST的变化。结果表明，在研究期间，所有LU-LC类别的温度均显着升高。这两年来，还分析了这些类别的不渗透表面积百分比（ISA）模式，并且观察到不同LU-LC类别的ISA呈上升趋势；这表明斋浦尔市已经见证了建筑面积的大幅增长，但绿化斑块和开阔土地的代价却是快速变化，这对LST的变化产生了明显的影响。冬季的平均温度升高约为2.6°C，而夏季则为1.47°C。分析了斋浦尔不同LU-LC上LST的季节间变化。