DOI: 10.1016/j.atmosres.2018.12.026
Scopus记录号: 2-s2.0-85059878091
论文题名: Impacts of urban expansion on fog types in Shanghai, China: Numerical experiments by WRF model
作者: Gu Y. ; Kusaka H. ; Doan V.Q. ; Tan J.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 220 起始页码: 57
结束页码: 74
语种: 英语
英文关键词: Climatological characteristics
; Fog event
; Fog type
; Shanghai
; Urban expansion
; WRF
Scopus关键词: Advection
; Atmospheric temperature
; Expansion
; Land use
; Mixing
; Urban transportation
; Water vapor
; Climatological characteristics
; Fog events
; Meteorological observation
; Numerical experiments
; Shanghai
; Surface air temperatures
; Urban expansion
; Water vapor mixing ratio
; Fog
; advection
; anthropogenic effect
; fog
; land use change
; numerical model
; sensitivity analysis
; urbanization
; weather forecasting
; China
; Shanghai
英文摘要: Fog is a hazard to transportation activities in Shanghai, China, but it is not known how this fog is influenced by urban expansion. Here we use a numerical model to run, for the first time for Shanghai, sensitivity experiments of the fog response to urban expansion, including the changes of land use and anthropogenic heat. Instead of using ‘fog days’ as a measure, we use the 29-year (1989–2017) meteorological observations of fog events at Hongqiao International Airport in central Shanghai, and classify the fog into radiation, advection, advection–radiation, and precipitation types. The results show that (1) Fog events generally decrease over these 29 years, with the decline in winter accounting for 50.2% of the total reduction. (2) Radiation fog decreases the most, but remains the most common type throughout the period. (3) Numerical sensitivity experiments show that the urban expansion in the past 29 years caused both an increase in surface air temperature and a decrease in water-vapor mixing ratio, resulting in a decrease in relative humidity and an increase in visibility for radiation fog. (4) For advection fog, the increased surface air temperature allowed an increase in water-vapor mixing ratio, but a decrease in liquid water. (5) Due to warmer near-surface air, the inversion layer weakened. Hence, urban expansion in Shanghai has reduced the amount of not only radiation fog, but also advection fog. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122306
Appears in Collections: 气候变化事实与影响
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作者单位: School of Air Transportation, Shanghai University of Engineering Science, Shanghai, 201620, China; Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan; Center for Climate Research Singapore537054, Singapore; Shanghai Meteorological Service, Shanghai Climate Center, Shanghai, 200030, China
Recommended Citation:
Gu Y.,Kusaka H.,Doan V.Q.,et al. Impacts of urban expansion on fog types in Shanghai, China: Numerical experiments by WRF model[J]. Atmospheric Research,2019-01-01,220