DOI: 10.1016/j.atmosenv.2020.117476
论文题名: Effects of cool roofs on turbulent coherent structures and ozone air quality in Seoul
作者: Han B.-S. ; Baik J.-J. ; Kwak K.-H. ; Park S.-B.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 229 语种: 英语
英文关键词: Air quality
; Atmospheric temperature
; Atmospheric thermodynamics
; Boundary layers
; Ozone
; Roofs
; Weather forecasting
; Wind
; Average air temperature
; Chemical production
; Community multi-scale air qualities
; Horizontal grid spacing
; Planetary boundary layers
; Seoul , South Korea
; Turbulent coherent structures
; Weather research and forecasting
; Air
; ozone
; air quality
; air temperature
; atmospheric modeling
; boundary layer
; chemical analysis
; concentration (composition)
; heat island
; ozone
; roof
; turbulence
; urban area
; weather forecasting
; advection
; air quality
; air temperature
; airflow
; Article
; boundary layer
; circadian rhythm
; concentration (parameter)
; cooling
; meteorology
; photochemistry
; photolysis
; priority journal
; sea
; solar radiation
; South Korea
; turbulent flow
; urban area
; wind speed
; Seoul [South Korea]
; South Korea
学科: Air quality
; Cool roofs
; Seoul
; Turbulent coherent structure
; WRF-CMAQ model
中文摘要: The cool-roof strategy is an effective way of mitigating severe urban heat islands, and its impacts on urban flow and air quality deserve in-depth investigations. This study examines the effects of cool roofs on turbulent coherent structures and ozone air quality in Seoul, South Korea using the Weather Research and Forecasting-Community Multiscale Air Quality (WRF-CMAQ) model with a 50 m horizontal grid spacing. Cool roofs decrease the daily average air temperature, planetary boundary layer (PBL) height, and wind speed in the urban area of Seoul by 0.80 °C, 230 m, and 0.17 m s−1, respectively. Due to the lowered air temperature by cool roofs, the sea breeze and convective structures weaken and eddies at the PBL top appear less frequently. Since high O3 concentration air flows into Seoul by the sea breeze, the weakened sea breeze decreases the daily average O3 concentration near the surface by 3.3 ppb. Air at lower level is transported upward across the PBL top by convective structures and eddies at the PBL top. The transported air at lower level has lower O3 concentration and higher concentrations of O3 precursors than air at upper level. Therefore, the weakened convective structures and less-frequent appearance of eddies at the PBL top by cool roofs weaken the upward transport of O3 precursors at lower level across the PBL top. As a result, the chemical production of O3 and O3 concentration slightly above the PBL top are decreased. An integrated process rate analysis shows that cool roofs weaken the effects of turbulent coherent structures on O3 concentration. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160376
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; School of Natural Resources and Environmental Science, Kangwon National University, Chuncheon, South Korea; Korea Institute of Atmospheric Prediction Systems, Seoul, South Korea
Recommended Citation:
Han B.-S.,Baik J.-J.,Kwak K.-H.,et al. Effects of cool roofs on turbulent coherent structures and ozone air quality in Seoul[J]. Atmospheric Environment,2020-01-01,229