气候变化领域集成服务门户(CCPortal): The characteristics and sources of the aerosols within the nocturnal residual layer over Wuhan, China

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DOI	10.1016/j.atmosres.2020.104959
	The characteristics and sources of the aerosols within the nocturnal residual layer over Wuhan, China
	Liu B.; Ma Y.; Shi Y.; Jin S.; Jin Y.; Gong W.
发表日期	2020
ISSN	0169-8095
卷号	241
英文摘要	The aerosols accumulating in the surface layer are an important factor in the study of urban environment pollution. In this study, the characteristics and sources of the aerosols within the nocturnal residual layer were investigated based on lidar measurements from May 2015 to July 2016. The results revealed that the annual average aerosol optical depths (AODs) in the residual layer (RL) and the stable boundary layer (SBL) were 0.2 ± 0.16 and 0.17 ± 0.11, respectively. The aerosol loading in the RL was higher than that in the SBL, accounting for 43% of the total surface aerosols. The AOD in the RL during the summer was the highest (0.32 ± 0.14), followed by autumn (0.24 ± 0.16) and spring (0.2 ± 0.16), and was the lowest in winter (0.11 ± 0.07). Moreover, the effects of different layer heights and meteorological parameters at different heights were investigated. The AOD in the RL was positively correlated with the residual layer height (RLH) and residual layer depth (RLD), with a correlation coefficient (R2) of approximately 0.58 and 0.58, respectively. The correlation coefficient between AOD in the RL and relative humidity at the heights of 0.4, 0.7, 1, and 1.3 km was 0.52, 0.52, 0.49, and 0.53, respectively. These results indicated that RLD and humidity would promote aerosol loading in the RL. The air mass potential source contribution function maps s revealed that the aerosols in the RL during spring and autumn originate from local and nearby areas, while the air masses during summer come from the local anthropogenic emission regions. In winter, the air masses that reach Wuhan often originate from the northwestern dust source region via long-distance advection. These findings are significant in the quest to improve our understanding of the effects of aerosols on environmental pollution. © 2020 Elsevier B.V.
关键词	Aerosols Boundary layers Meteorology Optical radar Aerosol optical depths Anthropogenic emissions Correlation coefficient Environmental pollutions Meteorological parameters Potential source contribution function Residual layers Stable boundary layer Air pollution aerosol air mass anthropogenic source emission inventory lidar measurement method nocturnal boundary layer optical depth point source pollution monitoring relative humidity seasonal variation urban pollution China Hubei Wuhan
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/132469
推荐引用方式 GB/T 7714	Liu B.,Ma Y.,Shi Y.,et al. The characteristics and sources of the aerosols within the nocturnal residual layer over Wuhan, China[J]. Atmospheric Research,2020,241.
APA	Liu B.,Ma Y.,Shi Y.,Jin S.,Jin Y.,&Gong W..(2020).The characteristics and sources of the aerosols within the nocturnal residual layer over Wuhan, China.,241.
MLA	Liu B.,et al."The characteristics and sources of the aerosols within the nocturnal residual layer over Wuhan, China".241(2020).