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Investigating the Contribution of Urban Canopy Model and Anthropogenic Heat Emission to Urban Heat Island Effect using WRF Model
Kundan Lal SHRESTHAEAkira KONDOEChikara MAEDAEAkikazu KAGAEYoshio INOUE
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@@@ Heat island effect changes the local weather pattern, increases energy costs to offset this effect, and increases demand for cooling. While considering urban heat island, local effects due to waste heat from vehicles, as well as from building and commercial energy consumption should be taken into consideration. In this research, state-of-the-art WRF model coupled with urban canopy model has been modified by including the gridded anthropogenic heat emission data of Osaka, Japan for meteorological modeling of Osaka region in order to assess the contribution of urban canopy effect and anthropogenic heat emission towards the formation of urban heat island. We developed and used a detailed urban land-use map to be used for urban canopy modeling, and a gridded emission map consisting of spatial and seasonal distribution of anthropogenic heat emission for better representation of urban heat emission. Using area-averaged and one-week averaged time series simulation results, we could understand the spatial and temporal behavior of urban heat island effect in more detail. The results showed an average increase of 0.8 K in near-surface air temperature in Osaka City when anthropogenic heat and urban canopy effect were taken into consideration.
Key words : Urban heat island, Anthropogenic heat, Simulation, Urban canopy model, WRF model
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