气候变化领域集成服务门户(CCPortal): Evolution of source attributed organic aerosols and gases in a megacity of central China

CCPortal

DOI	10.5194/acp-22-6937-2022
	Evolution of source attributed organic aerosols and gases in a megacity of central China
	Li, Siyuan; Liu, Dantong; Kong, Shaofei; Wu, Yangzhou; Hu, Kang; Zheng, Huang; Cheng, Yi; Zheng, Shurui; Jiang, Xiaotong; Ding, Shuo; Hu, Dawei; Liu, Quan; Tian, Ping; Zhao, Delong; Sheng, Jiujiang
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	6937
结束页码	6951
卷号	22 期号:10 页码:15
英文摘要	The secondary production of oxygenated organic aerosol (OOA) impacts air quality, climate, and human health. The importance of various sources in contributing to the OOA loading and associated different ageing mechanisms remains to be elucidated. Here we present a concurrent observation and factorization analysis on the mass spectra of organic aerosol (OA) by a high-resolution aerosol mass spectrometer and volatile organic compounds (VOCs) by a proton transfer reaction mass spectrometer in Wuhan, a megacity in central China, during autumn. The full mass spectra of organics with two principle anthropogenic sources were identified as the traffic and cooking sources, for their primary emission profiles in aerosol and gas phases, the evolutions, and their respective roles in producing OOA and secondary VOCs. Primary emissions in gas and aerosol phases both contributed to the production of OOA. The photooxidation of traffic sources from the morning rush hour caused a 2.5 fold increase in OOA mass in a higher oxidation state (oxygen-to-carbon ratio as O/C = 0.72), co-producing gas phase carboxylic acids, while, at night, cooking aerosols and VOCs (particularly acrolein and hexanal) importantly caused the nocturnal formation of oxygenated intermediate VOCs, increasing OOA mass by a factor of 1.7 (O/C = 0.42). The daytime and nighttime formation of secondary aerosols, as contributed by different sources, was found to be modulated by solar radiation and air moisture, respectively. The environmental policy should, therefore, consider the primary emissions and their respective ageing mechanisms influenced by meteorological conditions.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000802305300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273928
作者单位	Zhejiang University; China University of Geosciences; University of Manchester; Chinese Academy of Meteorological Sciences (CAMS); Chinese Academy of Sciences; Chinese Academy of Meteorological Sciences (CAMS)
推荐引用方式 GB/T 7714	Li, Siyuan,Liu, Dantong,Kong, Shaofei,et al. Evolution of source attributed organic aerosols and gases in a megacity of central China[J],2022,22(10):15.
APA	Li, Siyuan.,Liu, Dantong.,Kong, Shaofei.,Wu, Yangzhou.,Hu, Kang.,...&Sheng, Jiujiang.(2022).Evolution of source attributed organic aerosols and gases in a megacity of central China.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(10),15.
MLA	Li, Siyuan,et al."Evolution of source attributed organic aerosols and gases in a megacity of central China".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.10(2022):15.