Integrating CityFFD and WRF for modeling urban microclimate under heatwaves
| Autor: | Zahra Jandaghian, Mohammad Mortezazadeh, Liangzhu Leon Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Canyon
Canopy geography geography.geographical_feature_category Renewable Energy Sustainability and the Environment Geography Planning and Development 0211 other engineering and technologies Microclimate Transportation 02 engineering and technology 010501 environmental sciences Atmospheric sciences 01 natural sciences Wind speed Weather station Atmosphere 13. Climate action Weather Research and Forecasting Model Environmental science Climate model 021108 energy 0105 earth and related environmental sciences Civil and Structural Engineering |
| Zdroj: | Sustainable Cities and Society. 66:102670 |
| ISSN: | 2210-6707 |
| DOI: | 10.1016/j.scs.2020.102670 |
| Popis: | Urban atmospheric flow is characterized by meteorological processes and street-scale perturbations of microclimate wind velocity and air temperature distributions. The Weather Research and Forecasting model (WRF) is applied to investigate the effects of meteorological processes on temperature distribution over the Greater Montreal Area during the 2017 heatwave. The single-layer Urban Canopy Model is coupled with the WRF to estimate the heat fluxes from the canopy to the atmosphere. The mesoscale simulation results provide the boundary conditions for a new city-scale microclimate LES model, CityFFD. This study first validated the WRF model through multiple weather station measurements and the CityFFD model through the literature data, then investigated the impacts of three canyon aspect ratios and three anthropogenic heat regimes, i.e., surface temperature differences, on the boundary conditions setups. The strong anthropogenic heat assumption was applied to modeling the 2017 heatwave for three consecutive days using the integrated model. The transient results show that a difference of ∼4 m/s wind speed could result in a spatial temperature variation of up to 4 °C for the area under consideration. This study shows the importance of microclimate simulations for regional climate models when studying urban heatwaves. |
| Databáze: | OpenAIRE |
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