新冠疫情期间杭州市CO<sub>2</sub>浓度变化及成因分析

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摘要以长三角地区典型城市监测站(杭州)为研究对象,对2020年9月~2022年12月的大气CO₂数据进行分析,并进行疫情前后对比.结果表明,受新冠疫情影响,杭州城区2021年CO₂年平均浓度明显降低,与2019年相比下降了12.7×10^-6(2.8%),并且在2022年实现“零增长”.疫情后的游客等人为活动减少是导致杭州城区夏秋季(5~10月)CO₂浓度大幅降低的关键因素.与疫情前相比,疫情后工作日和周末CO₂浓度没有明显差异,并且在工作日出行高峰时段CO₂浓度没有出现明显上升,这表明疫情后,人为活动和交通排放对杭州大气CO₂浓度的贡献大幅降低.72h后向轨迹的聚类分析显示,杭州城区CO₂浓度不仅受到本地人为排放的影响,同时也受到人口密集､工业发达地区的污染气团传输的影响.

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	陈啸鸣
	刘硕
	臧昆鹏
	林溢
	陈圆圆
	胡智伟
	温军
	兰文港
	潘凤梅
	鲁嫣冉
	陈丽涵
	李珊
	郭朋
	方双喜

关键词 ：二氧化碳, 新冠疫情, 城市监测站, 趋势变化, 潜在源

Abstract：CO₂ data from September 2020 to December 2022 were analyzed and compared before and after the COVID-19 epidemic at a typical urban monitoring station (Hangzhou) in the Yangtze River Delta. The results showed that due to the impact of COVID-19, the average CO₂ concentration at Hangzhou in 2021 decreased significantly, by 12.7×10^-6 (2.8%) compared with that in 2019, and achieved “zero growth” in 2022. The decrease of tourists and other population activities after the epidemic was the key factor that led to the significant decrease of CO₂ concentration in summer and autumn (May to October). Compared with the pre-epidemic period, there was no significant difference in CO₂ concentrations between weekdays and weekends after the epidemic, and no significant increase in CO₂ concentration during peak travel hours on weekdays, indicating that the contribution of anthropogenic activities and traffic emissions to Hangzhou’s CO₂ concentrations decreased significantly after the epidemic. Cluster analysis of 72 hour back trajectory revealed that the CO₂ concentration at Hangzhou was not only affected by local anthropogenic emissions, but also affected by air mass transport from densely populated and industrially developed areas.

Key words： carbon dioxide COVID-19 urban monitoring station trend variation potential sources

收稿日期: 2023-12-13

PACS:

X511

基金资助:国家重点研发计划项目(2020YFA0607502);国家自然科学基金项目(42275113,42307126)

通讯作者: 刘硕,教授,fangsx@zjut.edu.cn;方双喜,讲师,shenna963@163.com E-mail: fangsx@zjut.edu.cn;shenna963@163.com

作者简介: 陈啸鸣(1999-),男,浙江台州人,浙江工业大学硕士研究生,主要研究方向为大气温室气体排放监测.cxm1401529083@163.com.

引用本文:

陈啸鸣, 刘硕, 臧昆鹏, 林溢, 陈圆圆, 胡智伟, 温军, 兰文港, 潘凤梅, 鲁嫣冉, 陈丽涵, 李珊, 郭朋, 方双喜. 新冠疫情期间杭州市CO₂浓度变化及成因分析[J]. 中国环境科学, 2024, 44(7): 3563-3572. CHEN Xiao-ming, LIU Shuo, ZANG Kun-peng, LIN Yi, CHEN Yuan-yuan, HU Zhi-wei, WEN Jun, LAN Wen-gang, PAN Feng-mei, LU Yan-ran, CHEN Li-han, LI Shan, GUO Peng, FANG Shuang-xi. Changes and causes of CO₂ concentration in Hangzhou during COVID-19. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(7): 3563-3572.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I7/3563

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