气候变化领域集成服务门户(CCPortal): Characteristics of aerosol within the nocturnal residual layer and its effects on surface PM2.5 over China

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DOI	10.1016/j.atmosenv.2020.117841
	Characteristics of aerosol within the nocturnal residual layer and its effects on surface PM2.5 over China
	Shi Y.; Liu B.; Chen S.; Gong W.; Ma Y.; Zhang M.; Jin S.; Jin Y.
发表日期	2020
ISSN	1352-2310
卷号	241
英文摘要	Aerosol loading within the surface layer is an important aspect in studying air quality. However, a comprehensive understanding of the characteristics and effects of aerosol in the residual layer (RL) over China is yet to be achieved. In this study, the characteristics of aerosol in the RL and its effects on the surface PM2.5 over China are investigated using ten-year Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) data from January 2008 to December 2017. Our results show that the high aerosol optical depth in the RL (RAOD) is generally found in the north-central and southwestern parts, whereas low values are observed in the northeastern and northwestern areas. The RAOD accounts for >50% of the total columnar aerosols in most regions, and the main components of aerosols in RL are polluted continental aerosol and polluted dust. A decreasing trend of RAOD was observed in the Yellow River Delta (YRD), North China Plain (NCP), Central China (CC) and Sichuan Basin (SCB), which are related to the decreasing emission of aerosols. Moreover, the effects of meteorological parameters on the RAOD were investigated. The relative humidity and the latent heat flux has a positive correlation with the RAOD in most areas, while the wind speed and the sensible heat flux has a negative correlation with the RAOD. The relationship between the RAOD and the following daytime surface particulate matters (PM2.5) were assessed. The correlation coefficients between RAOD and following daytime surface PM2.5 in YRD, NCP, CC and SCB were 0.29, 0.34, 0.4 and 0.39, respectively. The results proved that a high RAOD can promote the concentration of surface PM2.5. These findings are significant to the improvement of our understanding of the effects of aerosols in the RL on air quality. © 2020 Elsevier Ltd
关键词	Aerosol optical depth Aerosol types CALIPSO Meteorological parameters Residual layer
语种	英语
scopus关键词	Air quality; Heat flux; Optical radar; Wind; Aerosol optical depths; Cloud-aerosol lidar and infrared pathfinder satellite observations; Correlation coefficient; Meteorological parameters; Negative correlation; Particulate Matter; Positive correlations; Yellow River delta; Aerosols; aerosol; air quality; concentration (composition); heat flux; latent heat flux; optical depth; particulate matter; relative humidity; satellite data; sensible heat flux; spatiotemporal analysis; surface layer; wind velocity; aerosol; air quality; article; China; correlation coefficient; heat; humidity; infrared radiation; meteorology; optical depth; particulate matter; river; wind speed; China; North China Plain; Shandong; Sichuan Basin; Yellow River Delta
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248963
作者单位	School of Mathematics and Statistics, Wuhan University, Wuhan, China; State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan, China; International Research Center of Satellite Remote Sensing and Atmospheric Monitoring, Wuhan University, Wuhan, China; Hubei Key Laboratory of Critical Zone Evolution, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Shi Y.,Liu B.,Chen S.,et al. Characteristics of aerosol within the nocturnal residual layer and its effects on surface PM2.5 over China[J],2020,241.
APA	Shi Y..,Liu B..,Chen S..,Gong W..,Ma Y..,...&Jin Y..(2020).Characteristics of aerosol within the nocturnal residual layer and its effects on surface PM2.5 over China.ATMOSPHERIC ENVIRONMENT,241.
MLA	Shi Y.,et al."Characteristics of aerosol within the nocturnal residual layer and its effects on surface PM2.5 over China".ATMOSPHERIC ENVIRONMENT 241(2020).