气候变化领域集成服务门户(CCPortal): Global impact of the COVID-19 lockdown on surface concentration and health riskof atmospheric benzene

CCPortal

DOI	10.5194/acp-23-3311-2023
	Global impact of the COVID-19 lockdown on surface concentration and health riskof atmospheric benzene
	Ling, Chaohao; Cui, Lulu; Li, Rui
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	3311
结束页码	3324
卷号	23 期号:5 页码:14
英文摘要	To curb the spread of the COVID-19 pandemic, many countries around the world imposed an unprecedented lockdown, producing reductions in pollutant emissions. Unfortunately, the lockdown-driven global ambient benzene changes still remain unknown. An ensemble machine-learning model coupled with chemical transport models (CTMs) was applied to estimate global high-resolution ambient benzene levels. Afterwards, the extreme gradient boosting (XGBoost) algorithm was employed to decouple the contributions of meteorology and emission reduction to ambient benzene. The change ratio (P-dew) of the deweathered benzene concentration from the pre-lockdown to lockdown period was in the order of India (-23.6 %) > Europe (-21.9 %) > the United States (-16.2 %) > China (-15.6 %). The detrended change (P) of the deweathered benzene level (change ratio in 2020 - change ratio in 2019) followed the order of India (P=-16.2 %) > Europe (P=-13.9 %) > China (P=-13.3 %) > the United States (P*=-6.00 %). Emission reductions derived from industrial activities and transportation were major drivers for the benzene decrease during the lockdown period. The highest decreasing ratio of ambient benzene in India might be associated with local serious benzene pollution during the business-as-usual period and restricted transportation after lockdown. Substantial decreases in atmospheric benzene levels had significant health benefits. The global average lifetime carcinogenic risk (LCR) and hazard index (HI) decreased from 4.89x10(-7) and 5.90x10(-3 )to 4.51x10(-7) and 5.40x10(-3), respectively. China and India showed higher health benefits due to benzene pollution mitigation compared with other countries, highlighting the importance of benzene emission reduction.
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:000949470900001
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/273348
作者单位	MinNan Normal University; Tsinghua University; East China Normal University
推荐引用方式 GB/T 7714	Ling, Chaohao,Cui, Lulu,Li, Rui. Global impact of the COVID-19 lockdown on surface concentration and health riskof atmospheric benzene[J],2023,23(5):14.
APA	Ling, Chaohao,Cui, Lulu,&Li, Rui.(2023).Global impact of the COVID-19 lockdown on surface concentration and health riskof atmospheric benzene.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(5),14.
MLA	Ling, Chaohao,et al."Global impact of the COVID-19 lockdown on surface concentration and health riskof atmospheric benzene".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.5(2023):14.