气候变化领域集成服务门户(CCPortal): Chemical Characteristics and Brown Carbon Chromophores of Atmospheric Organic Aerosols Over the Yangtze River Channel: A Cruise Campaign

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DOI	10.1029/2020JD032497
	Chemical Characteristics and Brown Carbon Chromophores of Atmospheric Organic Aerosols Over the Yangtze River Channel: A Cruise Campaign
	Wang X.; Hayeck N.; Brüggemann M.; Abis L.; Riva M.; Lu Y.; Wang B.; Chen J.; George C.; Wang L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:16
英文摘要	Organic aerosols (OAs) have important influences on the climatic implications and health effects of atmospheric aerosols. Among the complex OA constituents, brown carbon (BrC) accounts for a substantial mass fraction and is of special interest because of its light-absorbing properties. In this study, the chemical composition of atmospheric OAs over the middle-lower Yangtze River (MLYR) channel, as well as the BrC, was investigated during a ship cruise campaign in winter 2015. In total, more than 1,000 molecular formulas were determined using a combination of ultra-high performance liquid chromatography (UHPLC), a diode array detector (DAD), and Orbitrap high-resolution mass spectrometry (HRMS). Large numbers and enhanced signal abundances for known tracers as well as monocyclic and polycyclic aromatics indicate that biomass burning and fossil combustion are important sources of OAs over the MLYR channel. In addition, 13 chromophores with strong light absorption, mostly representing established biomass burning tracers, were unambiguously determined by UHPLC/DAD/HRMS and contributed to 35–37% of the total light absorption of OAs at 290 nm and 58–70% at 350 nm. Sixty-three previously identified biomass burning chromophores were also positively identified in the mass spectrometric analysis here but embedded in the humped signal during the spectroscopic analysis. These BrC chromophores exhibit high degrees of unsaturation, suggesting that these compounds are aromatic, nitro-aromatic, and polycyclic aromatic type of species. Our results highlight the significant influence of biomass burning and fossil combustion on atmospheric OAs over the MLYR channel in the winter, strongly enhancing light-absorbing properties and decreasing air quality. ©2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185830
作者单位	Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Jiangwan Campus, Fudan University, Shanghai, China; Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne, France; Now at the Chemistry Department, Faculty of Arts and Sciences, American University of Beirut, Beirut, Lebanon; Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany; State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems, China Electric Power Research Institute, Beijing, China; Collaborative Innovation Center of Climate Change, Nanjing, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
推荐引用方式 GB/T 7714	Wang X.,Hayeck N.,Brüggemann M.,et al. Chemical Characteristics and Brown Carbon Chromophores of Atmospheric Organic Aerosols Over the Yangtze River Channel: A Cruise Campaign[J],2020,125(16).
APA	Wang X..,Hayeck N..,Brüggemann M..,Abis L..,Riva M..,...&Wang L..(2020).Chemical Characteristics and Brown Carbon Chromophores of Atmospheric Organic Aerosols Over the Yangtze River Channel: A Cruise Campaign.Journal of Geophysical Research: Atmospheres,125(16).
MLA	Wang X.,et al."Chemical Characteristics and Brown Carbon Chromophores of Atmospheric Organic Aerosols Over the Yangtze River Channel: A Cruise Campaign".Journal of Geophysical Research: Atmospheres 125.16(2020).