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DOI	10.1016/j.atmosres.2020.104957
	Temporal variation of urban aerosol pollution island and its relationship with urban heat island
	Li H.; Sodoudi S.; Liu J.; Tao W.
发表日期	2020
ISSN	0169-8095
卷号	241
英文摘要	Although urban aerosols have been extensively explored, the variation of aerosols across space and time in the city and its underlying mechanism have not been quantitatively understood. This study defined the phenomenon of higher aerosols concentrations in the urban areas than in the surrounding rural areas as “Urban Aerosol Pollution Island (UAPI)” and quantified UAPI intensity using the urban-rural difference of Particulate Matter (PM10) concentrations. We investigated the diurnal and seasonal variations of UAPI and its relationship with Urban Heat Island (UHI) in the metropolitan area of Berlin using the combination of a long-term (2010– 2017) observation network and the WRF-Chem model. Observation data showed that UAPI existed at most of time, with more than one-quarter of the days showing daily mean UAPI intensity of more than 5 μg/m3 and 10.6 μg/m3, respectively at background and traffic stations. The PM10 concentrations and UAPI intensity at background stations showed opposite diurnal variations, with higher PM10 concentrations at night, but larger UAPI intensity in the daytime. Seasonally, both PM10 concentrations and UAPI showed larger values in winter. The seasonal variation of UAPI intensity was closely related to the air temperature. The colder days in winter and hotter days with heat wave in summer showed larger UAPI intensity. The UAPI was negatively correlated to UHI in summer. The mitigation of UHI increased PM10 concentrations in urban areas by ~3%, leading to a stronger UAPI. This study can contribute to the accurate risk assessment of aerosol pollution and the design of mitigation strategies. © 2020 Elsevier B.V.
关键词	Aerosols Atmospheric temperature Risk assessment Rural areas Thermal pollution PM10 Seasonal variation Turbulent mixing Urban aerosols Urban heat island WRF-Chem Air pollution aerosol heat island particulate matter temporal analysis turbulent mixing urban pollution weather forecasting Berlin Germany
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132472
推荐引用方式 GB/T 7714	Li H.,Sodoudi S.,Liu J.,et al. Temporal variation of urban aerosol pollution island and its relationship with urban heat island[J]. Atmospheric Research,2020,241.
APA	Li H.,Sodoudi S.,Liu J.,&Tao W..(2020).Temporal variation of urban aerosol pollution island and its relationship with urban heat island.,241.
MLA	Li H.,et al."Temporal variation of urban aerosol pollution island and its relationship with urban heat island".241(2020).