Use of 'Local Climate Zones' for Detecting Urban Heat Island: A Case Study of Kolkata Metropolitan Area, India
| Autor: | D Bhowmick, K Mukherjee, P Dash, R Mondal |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 1164:012007 |
| ISSN: | 1755-1315 1755-1307 |
| DOI: | 10.1088/1755-1315/1164/1/012007 |
| Popis: | The land surface temperature (LST) increases both spatially and in magnitude as a result of rapid urbanization at the expense of the low radiative surface. This process modifies the urban climate which is attributable to a phenomenon recognized as the Urban Heat Island (UHI). By estimating LST, satellite remote sensing offers a cost-effective and time-saving methodology for spatio-temporal analyses of UHI. The limitation, however, is that urban and rural are becoming outmoded conceptions in landscape classification as a consequence of the high population density, particularly in countries like India. In densely populated regions, the countryside and the cities are no longer differentiated by a clear urban-rural divide. Thus, the traditional study of UHI can be enhanced by the adaptation of the newly developed “Local Climate Zones” (LCZ) characterization scheme based on building types and land cover characteristics. This LCZ mapping is an excellent method for categorizing urban areas associated with the most perceptible change in climate in urban areas, namely UHI. This paper aims to identify the LCZs dynamics over a decade from 2010 to 2020 in the Kolkata Metropolitan Area (KMA), the largest urban agglomeration in eastern India. The LCZ classification scheme has divided the landscapes into 17 conventional classes, 10 built-up classes, and 7 land cover classes that affect air temperature at a screen height of 1-2 meters above the ground. Each LCZ is distinguishable from another by its thermal property. Each of the classes will help to understand the nature of the local climates. It has thus become comparatively simple to estimate Urban Heat Island Intensity (UHII) with the help of the LCZ scheme. The paper explains the typical features of each LCZ of KMA and accomplishes a discussion on the efficiency of mapping UHII from LCZ classes. |
| Databáze: | OpenAIRE |
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