气候变化领域集成服务门户(CCPortal): Impacts of urban expansion on fog types in Shanghai; China: Numerical experiments by WRF model

CCPortal

DOI	10.1016/j.atmosres.2018.12.026
	Impacts of urban expansion on fog types in Shanghai; China: Numerical experiments by WRF model
	Gu Y.; Kusaka H.; Doan V.Q.; Tan J.
发表日期	2019
ISSN	0169-8095
起始页码	57
结束页码	74
卷号	220
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.
英文关键词	Climatological characteristics; Fog event; Fog type; Shanghai; Urban expansion; WRF
语种	英语
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
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162077
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
推荐引用方式 GB/T 7714	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],2019,220.
APA	Gu Y.,Kusaka H.,Doan V.Q.,&Tan J..(2019).Impacts of urban expansion on fog types in Shanghai; China: Numerical experiments by WRF model.Atmospheric Research,220.
MLA	Gu Y.,et al."Impacts of urban expansion on fog types in Shanghai; China: Numerical experiments by WRF model".Atmospheric Research 220(2019).