Nimish, G and Bharath, HA and Ramachandra, TV (2022) Visualization of landuse change pattern and its impact on Urban Heat Islands. [Book Chapter]
Full text not available from this repository.Abstract
Industrialization and globalization have connected the world culturally, developed economies, and have aided in developing business relations, thus shifting the work paradigm. However, this has come at the cost of climatic alterations harmful to the organisms residing on the earth. Humanoid activities have threateningly converted the natural landscape into economically beneficial developments and have created an imbalance in nature. These changes have altered natural environmental cycles (Water, Nitrogen, Carbon) and disrupted atmospheric processes. One of the most perilous among it is heat-related issues that include thermal stress/discomfort and the development of urban heat islands (UHIs). Global warming is one of the requisite phenomena that cannot be overlooked as it causes seasonal shifts that lead to numerous insinuation on the human race. It can be inferred to the inexorable rise in surface temperature globally. One of the foremost causes of the increase in Land Surface Temperature (LST) is unplanned, haphazard, and sprawling urbanization. LST is a vital parameter that helps in spatially observing the micro-, meso-, and macroclimate changes for an urban area. As a result of increasing surface temperature and rising heatwaves in the current scenario, urban areas are extremely prone to a phenomenon of UHI, which is getting substantial and severe with time. UHI can be defined as a relative measure of the temperature of an urban area with its surrounding or suburbs. UHI effect is an indicator of localized modification in the climate and is a significant issue as it happens in the atmospheric layer where most of the anthropogenic activities are performed. Mitigating measures for reducing the overall LST, as suggested by the research community, include developing terrace gardens, constructing green roofs, and dedicating a part of the land for plantation in every locality. This chapter deals with understanding the effect of Land Use change on Land Surface Temperature for Kolkata metropolitan in India over a period of 20 years. A buffer of 10km was considered to examine the urban sprawl, density of growth, and intensity of UHI. Kolkata is one of the few cities that has experienced tremendous growth in terms of the urban area (residential, commercial, industrial, and cultural) that have contributed to changes in the region's microclimate. The study examined landscape alterations for the metropolitan from 1999 to 2019 using a supervised classification technique for understanding the urban footprint. It was observed that there had been a rise of close to 200 in the urban area. LST was also quantified for the study area using Radiative Transfer algorithm for evaluating the level of ease among the residents, and a rise of 10°C was observed. The research also assessed classwise LST to understand the role of each class in defining the climate of the region, estimated UHI index to mark the areas under high stress. The study also aims at suggesting a few mitigation measures to reduce the overall thermal stress over the cities. The outcome of this research, along with other similar studies, can be used to improve the mitigation measures and develop sustainable policies that would help in creating a balance between humans and the environment. © 2022 Elsevier Inc. All rights reserved.
| Item Type: | Book Chapter |
|---|---|
| Publication: | Global Urban Heat Island Mitigation |
| Publisher: | Elsevier |
| Additional Information: | The copyright for this article belongs to Elsevier. |
| Keywords: | Climate change; Land surface temperature; Land use analysis; Urban growth; Urban heat island |
| Department/Centre: | Division of Biological Sciences > Centre for Ecological Sciences |
| Date Deposited: | 05 Jan 2023 07:12 |
| Last Modified: | 05 Jan 2023 07:12 |
| URI: | https://eprints.iisc.ac.in/id/eprint/78750 |
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