气候变化领域集成服务门户(CCPortal): Variations of air pollutant response to COVID-19 lockdown in cities of the Tibetan Plateau

CCPortal

DOI	10.1039/d2ea00168c
	Variations of air pollutant response to COVID-19 lockdown in cities of the Tibetan Plateau
	Chen, Xiyao; Zhang, Fan; Zhang, Dianguo; Xu, Liang; Liu, Rui; Teng, Xiaomi; Zhang, Xin; Wang, Shuo; Li, Weijun
发表日期	2023
EISSN	2634-3606
起始页码	708
结束页码	716
卷号	3 期号:4
英文摘要	Coronavirus Disease 2019 (COVID-19) accidentally appeared in Tibet on August 7, 2022, and broke the 920 consecutive epidemic-free days. The cities in Tibet completely kept lockdown to restrict the public to homes. It provided a valuable opportunity for understanding how variations of urban air pollutants responded to the COVID-19 lockdown in the special highland cities of the third polar. Compared with the global COVID-19 restrictions in 2020, a slightly negative O-3 anomaly and greater PM2.5 and NO2 reductions were found. The study showed PM10 (-65%) < NO2 (-53%) < PM2.5 (-52%) < O-3 (-15%) < CO (-11%) < SO2 (10%) in the Tibetan Lockdown 2022. The total gaseous oxidant (O-x = NO2 + O-3) decreased 18% in the Tibetan Lockdown 2022, but showed a limited change in the Lockdown 2020. Moreover, the diurnal profiles of NO2 and PM10 disappeared and the diurnal profiles of O-x, PM2.5, and PM2.5/CO became weakened. Via the random forest model-based weather normalization technique, we obtained the decoupled meteorological effects 1.3 +/- 0.6 times higher than the net emission reduction due to the Tibetan Lockdown 2022. Meanwhile, we found that the deweathered PM2.5 was mainly from residential combustion emissions due to the weak industrialization in Tibet. Here we roughly estimated that vehicle-related sources can contribute about 28% and 29% to PM2.5 and NO2 in urban cities of Tibet respectively. For eco-vulnerability protection and sustainable development in Tibet, more attention should be paid to reducing the more intensive local pollutant emissions from vehicles and residential combustion of urban cities.
英文关键词	SURFACE OZONE; METEOROLOGICAL NORMALIZATION; BOUNDARY-LAYER; CHINA
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000943915900001
来源期刊	ENVIRONMENTAL SCIENCE-ATMOSPHERES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283537
作者单位	Zhejiang University; China Jiliang University
推荐引用方式 GB/T 7714	Chen, Xiyao,Zhang, Fan,Zhang, Dianguo,et al. Variations of air pollutant response to COVID-19 lockdown in cities of the Tibetan Plateau[J],2023,3(4).
APA	Chen, Xiyao.,Zhang, Fan.,Zhang, Dianguo.,Xu, Liang.,Liu, Rui.,...&Li, Weijun.(2023).Variations of air pollutant response to COVID-19 lockdown in cities of the Tibetan Plateau.ENVIRONMENTAL SCIENCE-ATMOSPHERES,3(4).
MLA	Chen, Xiyao,et al."Variations of air pollutant response to COVID-19 lockdown in cities of the Tibetan Plateau".ENVIRONMENTAL SCIENCE-ATMOSPHERES 3.4(2023).