Quantifying the Impacts of High‐Resolution Urban Information on the Urban Thermal Environment

作者：Jie Wang, Shiguang Miao, Quang‐Van Doan, Fei Chen, Ronnie Abolafia‐Rosenzweig, Long Yang, Guwei Zhang, Yizhou Zhang, Jingjing Dou, Youpeng Xu · 发表于：Journal of Geophysical Research Atmospheres · 年份：2023 · DOI：10.1029/2022jd038048 · 被引用次数：20 · 研究领域：Urban Heat Island Mitigation、Wind and Air Flow Studies、Building Energy and Comfort Optimization

Abstract Detailed urban information, including land use/land cover (LULC), anthropogenic heat (AH) release, and urban canopy parameters (UCP), play critical roles in meteorological field simulations. It is particularly relevant for the Weather Research and Forecasting (WRF) model coupled with the single‐layer urban canopy model (SLUCM). Thus, we develop high‐resolution LULC, AH, and UCP data sets for Nanjing, a megacity in China, and conduct a series of numerical experiments with WRF/SLUCM to evaluate the impacts of urban parameters on the urban thermal environment. Model simulations with LULC scenarios have good agreement with the observed 2‐m temperature with a correlation coefficient of around 0.85, and present strong spatial homogeneity due to the more realistic representation of urban categories. The LULC change directly decreases the surface wind speed and increases (decreases) the sensible (latent) heat flux ( ()) in urban areas during the daytime; meanwhile increases and releases ground heat storage () during the nighttime, resulting in urban warming by 0.91°C in urban areas, compared with the control simulation (CTL) that does not take into account urban surfaces. In the LULC experiments combined with the UCP or AH, the UCP change enhances and releases more during nighttime, which increases by 0.13°C relative to LULC simulation. Also, the UCP effect reduces surface roughness and increases the width of the urban canopy, resulting in slightly enhanced wind speed, which...