气候变化领域集成服务门户(CCPortal): Diagnosing ozone-NOx-VOC sensitivity and revealing causes of ozoneincreases in China based on 2013-2021 satellite retrievals

CCPortal

DOI	10.5194/acp-22-15035-2022
	Diagnosing ozone-NOx-VOC sensitivity and revealing causes of ozoneincreases in China based on 2013-2021 satellite retrievals
	Ren, Jie; Guo, Fangfang; Xie, Shaodong
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	15035
结束页码	15047
卷号	22 期号:22 页码:13
英文摘要	Particulate matter (PM2.5) concentrations in China have decreased significantly in recent years, but surface ozone (O-3) concentrations showed upward trends at more than 71 % of air quality monitoring stations from 2015 to 2021. To reveal the causes of O-3 increases, O-3 production sensitivity is accurately diagnosed by deriving regional threshold values of the satellite tropospheric formaldehyde-to-NO2 ratio (HCHO/NO2), and O(3 )responses to precursor changes are evaluated by tracking volatile organic compounds (VOCs) and NOx with satellite HCHO and NO2. Results showed that the HCHO/NO2 ranges of transition from VOC-limited to NOx-limited regimes apparently vary among Chinese regions. VOC-limited regimes are found widely over megacity clusters (North China Plain, Yangtze River Delta and Pearl River Delta) and concentrated in developed cities (such as Chengdu, Chongqing, Xi'an and Wuhan). NOx-limited regimes dominate most of the remaining areas. From 2013 to 2021, satellite NO2 and HCHO columns showed an annual decrease of 3.0 % and 0.3 %, respectively, indicating an effective reduction in NOx emissions but a failure to reduce VOC emissions. This finding further shows that O-3 increases in major cities occur because the Clean Air Action Plan only reduces NOx emissions without effective VOC control. Based on the O-3-NOx-VOC relationship by satellite NO2 and HCHO in Beijing, Chengdu and Guangzhou, the ozone concentration can be substantially reduced if the reduction ratio of VOCs/NOx is between 2:1 and 4:1.
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:000890902900001
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/273414
推荐引用方式 GB/T 7714	Ren, Jie,Guo, Fangfang,Xie, Shaodong. Diagnosing ozone-NOx-VOC sensitivity and revealing causes of ozoneincreases in China based on 2013-2021 satellite retrievals[J],2022,22(22):13.
APA	Ren, Jie,Guo, Fangfang,&Xie, Shaodong.(2022).Diagnosing ozone-NOx-VOC sensitivity and revealing causes of ozoneincreases in China based on 2013-2021 satellite retrievals.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(22),13.
MLA	Ren, Jie,et al."Diagnosing ozone-NOx-VOC sensitivity and revealing causes of ozoneincreases in China based on 2013-2021 satellite retrievals".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.22(2022):13.