期刊
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
卷 118, 期 17, 页码 9804-9818出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/jgrd.50795
关键词
WRF; urban canopy model; urban heat island; anthropogenic heat; sea; land breeze; planetary boundary layer
资金
- Singapore National Research Foundation (NRF) through the Singapore-MIT Alliance for Research and Technology (SMART) Center for Environmental Sensing and Modeling (CENSAM)
- National University of Singapore [R-109-000-091-112]
This study employed the Weather Research and Forecasting model with a single-layer urban canopy model to investigate the urban environment of a tropical city, Singapore. The coupled model was evaluated against available observational data from a sensor network and flux tower. The effects of land use type and anthropogenic heat (AH) on the thermal and wind environment were investigated with a series of sensitivity tests using an ensemble approach for low advection, high convective available potential energy, intermonsoon season cases. The diurnal cycle and spatial pattern of urban heat island (UHI) intensity and planetary boundary layer height were investigated. The mean UHI intensity peaked in the early morning at 2.2 degrees C, reaching 2.4 degrees Cin industrial areas. Sea and land breezes developed during daytime and nighttime, respectively, with the former much stronger than the latter. The model predicted that sea breezes from different coastlines of the Malay Peninsula meet and converge, inducing strong updrafts. AH was found to play roles in all the processes studied, while the effect of different land use types was most pronounced during nighttime, and least visible near noon.
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