Assessment of universal thermal climate index (UTCI) using the WRF-UCM model over a metropolitan city in India
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View abstract on PubMed
Summary
This summary is machine-generated.Urban expansion in Hyderabad significantly increases thermal stress, with built-up areas experiencing higher temperatures. This study highlights the impact of urbanization on outdoor thermal comfort using the Weather Research and Forecasting model coupled with a Urban Canopy Model (WRF-UCM).
Area Of Science
- Urban climatology
- Environmental science
- Human biometeorology
Background
- Rapid urbanization intensifies urban heat islands, negatively impacting public health and quality of life.
- Accurate assessment of outdoor thermal comfort is essential for urban planning and health initiatives.
Purpose Of The Study
- To simulate urban meteorological conditions in Hyderabad using a high-resolution mesoscale model.
- To assess the impact of urbanization on outdoor thermal comfort by estimating the Universal Thermal Climate Index (UTCI).
Main Methods
- Implementation of the Weather Research and Forecasting model coupled with a single-layer Urban Canopy Model (WRF-UCM).
- Simulation of meteorological conditions for summer and winter periods in 2009 and 2019.
- Estimation of UTCI using model-derived atmospheric variables and human biometeorology parameters.
Main Results
- Hyderabad experienced approximately 50 hours of very strong thermal stress in summer and 120 hours of slight cold stress in winter.
- Urban expansion (5% to 15%) correlated with increased land surface temperature (2.5-2.8°C) and air temperature (1.2-1.9°C).
- Maximum UTCI values were consistently observed in built-up areas, indicating higher thermal stress compared to other land classes.
Conclusions
- The WRF-UCM model effectively demonstrated the significant influence of urbanization on thermal comfort in Hyderabad.
- Findings provide crucial insights for urban planning to mitigate adverse effects of thermal stress and improve urban welfare.
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