气候变化领域集成服务门户(CCPortal): Size distribution and formation processes of aerosol water-soluble organic carbon during winter and summer in urban Beijing

CCPortal

DOI	10.1016/j.atmosenv.2020.117983
	Size distribution and formation processes of aerosol water-soluble organic carbon during winter and summer in urban Beijing
	Ni X.; Pan Y.; Shao P.; Tian S.; Zong Z.; Gu M.; Liu B.; Liu J.; Cao J.; Sun Q.; Wang Y.; Jiang C.
发表日期	2021
ISSN	1352-2310
卷号	244
英文摘要	Size-resolved aerosol organic carbon (OC) and water-soluble OC (WSOC) was determined weekly in urban Beijing between 2013 and 2018. The results showed that in winter, the concentrations of WSOC and OC in fine (<2.1 μm) and coarse (>2.1 μm) mode were highest in 2013. During the following years, the concentrations of WSOC and OC were lower but an increasing trend was found from 2014 to 2016, which might be due to the increasing precursor concentrations. From summer 2013 to 2018, the concentrations of OC and WSOC in both fine and coarse mode decreased, which might be affected by decreasing emission intensity and photochemical oxidation. To characterize the seasonality of WSOC, two intensive field observations were further performed in winter 2013 and summer 2018. In winter of 2013, WSOC was mainly enriched in PM1 (<1 μm) on clean days and lightly polluted days. In addition, the fine mode maximum shifted from 0.43-0.65 μm to 1.1–2.1 μm with the haze development due to the hygroscopic growth of particles. In summer of 2018, the WSOC was mainly concentrated in PM1, but in a few samples, the maximum size appeared in coarse mode. This difference might due to the different relative humidity and air mass sources. While the formation process of WSOC in winter was affected by photochemical oxidation below 2.1 μm, in 1.1–2.1 μm, it tended to change from photochemical oxidation to aqueous-phase oxidation. For the coarse mode WSOC formation in winter, however, it was mainly affected by heterogeneous processes. The findings advanced our understanding of the annual trends, size distribution and formation processes of WSOC, with significant implications for air pollution control in Beijing and surrounding regions. © 2020
关键词	Beijing Haze pollution Particle size distribution Secondary processes Water-soluble organic carbon
语种	英语
scopus关键词	Aerosols; Air pollution control; Organic carbon; Oxidation; Size distribution; Aqueous phase oxidations; Emission intensity; Field observations; Hygroscopic growth; Photochemical oxidation; Precursor concentration; Surrounding regions; Water-soluble organic carbon; Silicon compounds; organic carbon; water; aerosol; air mass; atmospheric pollution; haze; organic carbon; oxidation; photodegradation; pollution control; relative humidity; seasonality; size distribution; solubility; Article; China; haze; humidity; particle size; particulate matter 2.5; photooxidation; PM2.5 exposure; priority journal; seasonal variation; secondary organic aerosol; summer; urban area; water solubility; winter; Beijing [China]; China
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/248786
作者单位	State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, College of Resources and Environment, Southwest University, Chongqing, 400715, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Beijing Center for Physical & Chemical Analysis, Beijing, 100089, China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China
推荐引用方式 GB/T 7714	Ni X.,Pan Y.,Shao P.,et al. Size distribution and formation processes of aerosol water-soluble organic carbon during winter and summer in urban Beijing[J],2021,244.
APA	Ni X..,Pan Y..,Shao P..,Tian S..,Zong Z..,...&Jiang C..(2021).Size distribution and formation processes of aerosol water-soluble organic carbon during winter and summer in urban Beijing.ATMOSPHERIC ENVIRONMENT,244.
MLA	Ni X.,et al."Size distribution and formation processes of aerosol water-soluble organic carbon during winter and summer in urban Beijing".ATMOSPHERIC ENVIRONMENT 244(2021).