气候变化领域集成服务门户(CCPortal): Observation Constrained Aromatic Emissions in Shanghai, China

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DOI	10.1029/2019JD031815
	Observation Constrained Aromatic Emissions in Shanghai, China
	Wang H.; Yan R.; Xu T.; Wang Y.; Wang Q.; Zhang T.; An J.; Huang C.; Gao Y.; Gao Y.; Li X.; Yu C.; Jing S.; Qiao L.; Lou S.; Tao S.; Li Y.
发表日期	2020
ISSN	2169897X
卷号	125 期号:6
英文摘要	Aromatics in the atmosphere are a large contributor to ozone and secondary organic aerosol formation and have an adverse impact on human health. Observation-based emissions are urgently needed for air quality management and decision making due to the large uncertainties in the emissions inventories. Atmospheric aromatics were continuously observed at one urban site in Shanghai of China in 2015, which were compared with the simulations of the Community Multiscale Air Quality (CMAQ) model. Large differences were found in the temporal variations between the model and measurements, corroborating with previous studies that the current bottom-up emission inventories are highly biased. We corrected the aromatic emissions biases of the emission inventories using the observations with the CMAQ simulations, with the assumption that the response relationship of the emissions input and aromatic concentrations was reasonable on a monthly basis in CMAQ simulations, suggesting that the results are dependent on the model performance. The resulting aromatic emissions exhibited clear monthly variations, increasing from 5.5 ± 2.1 Gg month−1 in February to 17.4 ± 7.7 Gg month−1 in July, being different from the flat monthly pattern in the current bottom-up emissions inventory. Toluene, xylenes, and ethylbenzene dominated aromatic emissions, accounting for ~74% on average but with considerable monthly variations, which was different from the nearly uniform value of 77% throughout the whole year in the emissions inventory. These highly temporally resolved and speciated in situ aromatics measurements provide observation-based constraints on aromatic emissions, which cannot be obtained from satellite measurements. This study proposes a top-down emission estimation method constrained by ambient measurements. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aromatics; emissions; observation-constrained; Shanghai
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/186122
作者单位	Shanghai Academy of Environmental Sciences, State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai, China; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China; State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beij...
推荐引用方式 GB/T 7714	Wang H.,Yan R.,Xu T.,et al. Observation Constrained Aromatic Emissions in Shanghai, China[J],2020,125(6).
APA	Wang H..,Yan R..,Xu T..,Wang Y..,Wang Q..,...&Li Y..(2020).Observation Constrained Aromatic Emissions in Shanghai, China.Journal of Geophysical Research: Atmospheres,125(6).
MLA	Wang H.,et al."Observation Constrained Aromatic Emissions in Shanghai, China".Journal of Geophysical Research: Atmospheres 125.6(2020).