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Urban Heat Islands during Heat Waves: A Comparative Study between Boston and Phoenix

Journal of applied meteorology and climatology, 2021-05, Vol.60 (5), p.621-641 [Peer Reviewed Journal]

2021 American Meteorological Society ;Copyright American Meteorological Society May 2021 ;ISSN: 1558-8424 ;EISSN: 1558-8432 ;DOI: 10.1175/JAMC-D-20-0132.1

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Title:
Urban Heat Islands during Heat Waves: A Comparative Study between Boston and Phoenix
Author: Wang, Liang ; Li, Dan
Subjects: Aerodynamics ; Aircraft ; Airports ; Archives & records ; Atmosphere ; Atmospheric boundary layer ; Climate ; Comparative analysis ; Comparative studies ; Convection ; Convective heat transfer ; Daytime ; Energy ; Heat ; Heat flux ; Heat islands ; Heat storage ; Heat tolerance ; Heat transfer ; Heat waves ; Islands ; Latent heat ; Latent heat flux ; Lower atmosphere ; Moisture effects ; Night ; Radiation ; Rural areas ; Surface resistance ; Temperature ; Urban areas ; Urban cool islands ; Urban heat islands ; Vegetation ; Weather forecasting
Is Part Of: Journal of applied meteorology and climatology, 2021-05, Vol.60 (5), p.621-641
Description: In this study, we simulate the magnitude of urban heat islands (UHIs) during heat wave (HWs) in two cities with contrasting climates (Boston, Massachusetts, and Phoenix, Arizona) using the Weather Research and Forecasting (WRF) Model and quantify their drivers with a newly developed attribution method. During the daytime, a surface UHI (SUHI) is found in Boston, which is mainly caused by the higher urban surface resistance that reduces the latent heat flux and the higher urban aerodynamic resistance r a that inhibits convective heat transfer between the urban surface and the lower atmosphere. In contrast, a daytime surface urban cool island is found in Phoenix, which is mainly due to the lower urban r a that facilitates convective heat transfer. In terms of near-surface air UHI (AUHI), there is almost no daytime AUHI in either city. At night, an SUHI and an AUHI are identified in Boston that are due to the stronger release of heat storage in urban areas. In comparison, the lower urban r a in Phoenix enhances convective heat transfer from the atmosphere to the urban surface at night, leading to a positive SUHI but no AUHI. Our study highlights that the magnitude of UHIs or urban cool islands is strongly controlled by urban–rural differences in terms of aerodynamic features, vegetation and moisture conditions, and heat storage, which show contrasting characteristics in different regions.
Publisher: Boston: American Meteorological Society
Language: English
Identifier: ISSN: 1558-8424
EISSN: 1558-8432
DOI: 10.1175/JAMC-D-20-0132.1
Source: Alma/SFX Local Collection
ProQuest Central

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Urban Heat Islands during Heat Waves: A Comparative Study between Boston and Phoenix

2021 American Meteorological Society ;Copyright American Meteorological Society May 2021 ;ISSN: 1558-8424 ;EISSN: 1558-8432 ;DOI: 10.1175/JAMC-D-20-0132.1

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