气候变化领域集成服务门户(CCPortal): Dramatic changes in atmospheric pollution source contributions for a coastal megacity in northern China from 2011 to 2020

CCPortal

DOI	10.5194/acp-22-8597-2022
	Dramatic changes in atmospheric pollution source contributions for a coastal megacity in northern China from 2011 to 2020
	Liu, Baoshuang; Wang, Yanyang; Meng, He; Dai, Qili; Diao, Liuli; Wu, Jianhui; Shi, Laiyuan; Wang, Jing; Zhang, Yufen; Feng, Yinchang
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	8597
结束页码	8615
卷号	22 期号:13 页码:19
英文摘要	Understanding the effectiveness of long-term air pollution regulatory measures is important for control policy formulation. Efforts have been made using chemical transport modelling and statistical approaches to evaluate the efficacy of the Clean Air Action Plan (CAAP; 2013-2017) and the Blue Sky Protection Campaign (BSPC; 2018-2020) enacted in China. Changes in air quality due to reduction in emissions can be masked by meteorology, making it highly challenging to reveal the real effects of control measures. A knowledge gap still existed with respect to how sources changed before and after the CAAP and BSPC were implemented, respectively, particularly in coastal areas where anthropogenic emissions mixed with additional natural sources (e.g. marine aerosol). This work applied a machine-learning-based meteorological normalization approach to decouple the meteorological effects from air quality trend in a coastal city in northern China (Qingdao). Secondly, the relative changes in source contributions to ambient PM2.5 with a similar to 10-year observation interval (2011-2012, 2016, and 2019) were also investigated. We discovered that the largest emission reduction section was likely from coal combustion as the meteorologically normalized SO2 dropped by similar to 15.5 % yr(-1), and the annual average dispersion-normalized SO42- decreased by similar to 41.5 %. Change in the meteorologically normalized NO2 was relatively stable (similar to 1.0 % yr(-1)), and NO3 changed inappreciably in 2016-2019 but was significantly higher than that prior to the CAAP. Crustal dust decreased remarkably after the CAAP began. Industrial emissions, for example, steel-related smelting, decreased after 2016 due to the relocation of steel-making enterprises. Note that vehicle emissions were increased in importance as opposed to the other primary sources Similar to other megacities, Qingdao is also at risk of increased ozone pollution that in turn facilitates secondary-particle formation in the future. The policy assessment approaches applied in this work also work for other places where air quality management is highly in demand to reduce air pollution.
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:000820744800001
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/273555
作者单位	Nankai University
推荐引用方式 GB/T 7714	Liu, Baoshuang,Wang, Yanyang,Meng, He,et al. Dramatic changes in atmospheric pollution source contributions for a coastal megacity in northern China from 2011 to 2020[J],2022,22(13):19.
APA	Liu, Baoshuang.,Wang, Yanyang.,Meng, He.,Dai, Qili.,Diao, Liuli.,...&Feng, Yinchang.(2022).Dramatic changes in atmospheric pollution source contributions for a coastal megacity in northern China from 2011 to 2020.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(13),19.
MLA	Liu, Baoshuang,et al."Dramatic changes in atmospheric pollution source contributions for a coastal megacity in northern China from 2011 to 2020".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.13(2022):19.