气候变化领域集成服务门户(CCPortal): Measurement report: An assessment of the impact of a nationwide lockdown on air pollution

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DOI	10.5194/acp-21-9047-2021
	Measurement report: An assessment of the impact of a nationwide lockdown on air pollution - A remote sensing perspective over India
	Pathakoti M.; Muppalla A.; Hazra S.; Venkata M.D.; Lakshmi K.A.; Sagar V.K.; Shekhar R.; Jella S.; Rama S.S.M.V.; Vijayasundaram U.
发表日期	2021
ISSN	1680-7316
起始页码	9047
结束页码	9064
卷号	21 期号:11
英文摘要	The nationwide lockdown was imposed over India from 25 March to 31 May 2020 with varied relaxations from phase I to phase IV to contain the spread of COVID-19. Thus, emissions from industrial and transport sectors were halted during lockdown (LD), which has resulted in a significant reduction of anthropogenic pollutants. The first two lockdown phases were strictly implemented (phase I and phase II) and hence were considered to be total lockdown (TLD) in this study. Satellite-based tropospheric columnar nitrogen dioxide (TCN) from the years 2015 to 2020, tropospheric columnar carbon monoxide (TCC) during 2019/20, and aerosol optical depth (AOD550) from the years 2014 to 2020 during phase I and phase II LD and pre-LD periods were investigated with observations from Aura OMI, Sentinel-5P TROPOMI, and Aqua and Terra MODIS. To quantify lockdown-induced changes in TCN, TCC, and AOD550, detailed statistical analysis was performed on de-trended data using the Student paired statistical t test. Results indicate that mean TCN levels over India showed a dip of 18g % compared to the previous year and also against the 5-year mean TCN levels during the phase I lockdown, which was found to be statistically significant (p value
语种	英语
scopus关键词	Aqua (satellite); assessment method; atmospheric pollution; MODIS; nitrogen dioxide; quantitative analysis; remote sensing; satellite data; Terra (satellite); India
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/246808
作者单位	Earth and Climate Sciences Area (ECSA), National Remote Sensing Centre (NRSC), Indian Space Research Organization (ISRO), Hyderabad, 500037, India; Bhuvan Geoportal and Data Dissemination Area, NRSC, ISRO, Hyderabad, 500037, India; Department of Computer Science, School of Engineering and Technology, Pondicherry University, Chinna Kalapet, Kalapet, Puducherry, 605014, India
推荐引用方式 GB/T 7714	Pathakoti M.,Muppalla A.,Hazra S.,et al. Measurement report: An assessment of the impact of a nationwide lockdown on air pollution - A remote sensing perspective over India[J],2021,21(11).
APA	Pathakoti M..,Muppalla A..,Hazra S..,Venkata M.D..,Lakshmi K.A..,...&Vijayasundaram U..(2021).Measurement report: An assessment of the impact of a nationwide lockdown on air pollution - A remote sensing perspective over India.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Pathakoti M.,et al."Measurement report: An assessment of the impact of a nationwide lockdown on air pollution - A remote sensing perspective over India".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).