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Modeling Land Surface Temperature with a Mono-Window Algorithm to Estimate Urban Heat Island Intensity in an Expanding Urban Area

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Abstract

We have estimated the amplitude and impact of urbanization on Chittagong metropolitan area (CMA), and investigated the correlation between land cover features and land surface temperature (LST). We have also located the urban heat island (UHI) and calculated the UHI intensity. Support vector machine (SVM) for land cover classification and mono-window algorithm (MWA) for LST estimation were applied to Landsat images of years 1990, 2000, 2010 and 2020. Validation of classification and temperature was also done by various statistical parameters giving credible results. The findings reveal that in Chittagong, between 1990 and 2020, the urban area has raised by almost 12%, whereas vegetative areas have decreased by about 14%. With the rise of the urban area, the temperature has also shifted from 19.8 °C to 23.7 °C. Moreover, the UHI intensity has also raised from 1 °C to 2.3 °C, which is the indication of an unplanned and unsustainable urban development. Evidently, the whole city can turn into a UHI if proper steps are not taken immediately.

Highlights

  • LST has increased almost 4 °C between 1990 and 2020

  • The UHI intensity decreases with the increasing distance from the urban center

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Shahriar Abdullah: Conceptualization, Investigation, Supervision, Methodology, Writing - review & editing. Dhrubo Barua: Investigation, Resources, Software, Visualization, Original draft.

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Correspondence to Shahriar Abdullah.

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Abdullah, S., Barua, D. Modeling Land Surface Temperature with a Mono-Window Algorithm to Estimate Urban Heat Island Intensity in an Expanding Urban Area. Environ. Process. 9, 14 (2022). https://doi.org/10.1007/s40710-021-00554-8

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  • DOI: https://doi.org/10.1007/s40710-021-00554-8

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