气候变化领域集成服务门户(CCPortal): Impact of deliquescence of aerosol on mass absorption efficiency of elemental carbon in fine particles in urban Guangzhou in south China

CCPortal

DOI	10.1016/j.atmosenv.2021.118476
	Impact of deliquescence of aerosol on mass absorption efficiency of elemental carbon in fine particles in urban Guangzhou in south China
	Tao J.; Zhang Z.; Zhang L.; Wu Y.; Zhang R.; Wang B.
发表日期	2021
ISSN	1352-2310
卷号	256
英文摘要	To explore the controlling factors for mass absorption efficiency (MAE) of elemental carbon (EC) in fine particles (PM2.5), major chemical compositions in size-segregated aerosol samples and bulk PM2.5 samples and light absorption coefficient (bap) of PM2.5 samples under dry condition were measured during four seasons in an urban environment in Guangzhou of south China. On seasonal average, absorption Ångström exponent (AAE) in the wavelength range of 370–880 nm measured by a transmissometer or in the range of 370–950 nm measured by an aethalometer ranged from 0.95 to 1.02 and from 1.01 to 1.14, respectively. The estimated EC MAE at 550 nm in PM2.5 were 10.1 ± 1.0, 8.9 ± 0.7, 9.1 ± 1.0 and 9.1 ± 0.7 m2 g−1 in spring, summer, autumn and winter, respectively, which were evidently higher than the value of 7.5 m2 g−1 for “pure EC”. More than 61% of EC mass in PM2.1 was distributed in the droplet mode (0.43–2.1 μm), which should be related to hygroscopic growth of aged EC particle as well as external mixing with coating materials. No significant correlations were found between EC MAE and mass fraction of EC or mass ratio of (SO42-+NO3−+OC)/EC in the droplet mode. The deliquescence of aerosol was primarily determined by NH4NO3, and the high EC MAE was mainly related to high nitrate mass concentration and positive ΔRH (ambient relative humidity minus deliquescence relative humidity of NH4NO3). © 2021 Elsevier Ltd
关键词	Deliquescence of nitrate particle Deliquescence relative humidity Light absorption coefficient Mass absorption efficiency Particle size distribution
语种	英语
scopus关键词	Aerosols; Atmospheric humidity; Drops; Efficiency; Light absorption; Nitrates; Particle size; Particle size analysis; Absorption efficiency; Carbon mass; Deliquescence of nitrate particle; Deliquescence relative humidity; Elemental carbon; Light absorption coefficients; Mass absorption; Mass absorption efficiency; Particles-size distributions; PM$-2.5$; Carbon; black carbon; carbon; nitrate; absorption coefficient; absorption efficiency; aerosol; coating; elemental carbon; relative humidity; spatiotemporal analysis; urban area; aerosol; air quality; Article; autumn; chemical composition; China; circadian rhythm; controlled study; humidity; light absorption; meteorology; particulate matter 2.5; priority journal; season; seasonal variation; spring; summer; urban area; winter; China; Guangdong; Guangzhou
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/248397
作者单位	Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; South China Institute of Environmental Sciences, Ministry of Ecology and Environmental, Guangzhou, China; Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Canada; Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Guangzhou, China
推荐引用方式 GB/T 7714	Tao J.,Zhang Z.,Zhang L.,et al. Impact of deliquescence of aerosol on mass absorption efficiency of elemental carbon in fine particles in urban Guangzhou in south China[J],2021,256.
APA	Tao J.,Zhang Z.,Zhang L.,Wu Y.,Zhang R.,&Wang B..(2021).Impact of deliquescence of aerosol on mass absorption efficiency of elemental carbon in fine particles in urban Guangzhou in south China.ATMOSPHERIC ENVIRONMENT,256.
MLA	Tao J.,et al."Impact of deliquescence of aerosol on mass absorption efficiency of elemental carbon in fine particles in urban Guangzhou in south China".ATMOSPHERIC ENVIRONMENT 256(2021).