A global observational analysis to understand changes in air quality during exceptionally low anthropogenic emission conditions

Sokhi, Ranjeet S.; Singh, Vikas; Querol, Xavier; Finardi, Sandro; Targino, Admir Créso; Andrade, Maria de Fatima; Pavlovic, Radenko; Garland, Rebecca M.; Massagué, Jordi; Kong, Shaofei; Baklanov, Alexander; Ren, Lu; Tarasova, Oksana; Carmichael, Greg; Peuch, Vincent-Henri; Anand, Vrinda; Arbilla, Graciela; Badali, Kaitlin; Beig, Gufran; Belalcazar, Luis Carlos; Bolignano, Andrea; Brimblecombe, Peter; Camacho, Patricia; Casallas, Alejandro; Charland, Jean-Pierre; Choi, Jason; Chourdakis, Eleftherios; Coll, Isabelle; Collins, Marty; Cyrys, Josef; da Silva, Cleyton Martins; Di Giosa, Alessandro Domenico; Di Leo, Anna; Ferro, Camilo; Gavidia-Calderon, Mario; Gayen, Amiya; Ginzburg, Alexander; Godefroy, Fabrice; Gonzalez, Yuri Alexandra; Guevara-Luna, Marco; Haque, Sk. Mafizul; Havenga, Henno; Herod, Dennis; Hõrrak, Urmas; Hussein, Tareq; Ibarra, Sergio; Jaimes, Monica; Kaasik, Marko; Khaiwal, Ravindra; Kim, Jhoon; Kousa, Anu; Kukkonen, Jaakko; Kulmala, Markku; Kuula, Joel; La Violette, Nathalie; Lanzani, Guido; Liu, Xi; MacDougall, Stephanie; Manseau, Patrick M.; Marchegiani, Giada; McDonald, Brian; Mishra, Swasti Vardhan; Molina, Luisa T.; Mooibroek, Dennis; Mor, Suman; Moussiopoulos, Nicolas; Murena, Fabio; Niemi, Jarkko V.; Noe, Steffen; Nogueira, Thiago; Norman, Michael; Pérez-Camaño, Juan Luis; Petäjä, Tuukka; Piketh, Stuart; Rathod, Aditi; Reid, Ken; Retama, Armando; Rivera, Olivia; Rojas, Néstor Y.; Rojas-Quincho, Jhojan P.; San José, Roberto; Sánchez, Odón; Seguel, Rodrigo J.; Sillanpää, Salla; Su, Yushan; Tapper, Nigel; Terrazas, Antonio; Timonen, Hilkka; Toscano, Domenico; Tsegas, George; Velders, Guus J.M.; Vlachokostas, Christos; von Schneidemesser, Erika; VPM, Rajasree; Yadav, Ravi; Zalakeviciute, Rasa; Zavala, Miguel

doi:10.1016/j.envint.2021.106818

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A global observational analysis to understand changes in air quality during exceptionally low anthropogenic emission conditions

2021
By Sokhi, Ranjeet S. ; Singh, Vikas ; Querol, Xavier ; ...
Source: Environment International, 157: 106818

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Journal Title:

Environment International
Personal Author:

Sokhi, Ranjeet S. ; Singh, Vikas ; Querol, Xavier ; Finardi, Sandro ; Targino, Admir Créso ; ... More +

Sokhi, Ranjeet S. ; Singh, Vikas ; Querol, Xavier ; Finardi, Sandro ; Targino, Admir Créso ; Andrade, Maria de Fatima ; Pavlovic, Radenko ; Garland, Rebecca M. ; Massagué, Jordi ; Kong, Shaofei ; Baklanov, Alexander ; Ren, Lu ; Tarasova, Oksana ; Carmichael, Greg ; Peuch, Vincent-Henri ; Anand, Vrinda ; Arbilla, Graciela ; Badali, Kaitlin ; Beig, Gufran ; Belalcazar, Luis Carlos ; Bolignano, Andrea ; Brimblecombe, Peter ; Camacho, Patricia ; Casallas, Alejandro ; Charland, Jean-Pierre ; Choi, Jason ; Chourdakis, Eleftherios ; Coll, Isabelle ; Collins, Marty ; Cyrys, Josef ; da Silva, Cleyton Martins ; Di Giosa, Alessandro Domenico ; Di Leo, Anna ; Ferro, Camilo ; Gavidia-Calderon, Mario ; Gayen, Amiya ; Ginzburg, Alexander ; Godefroy, Fabrice ; Gonzalez, Yuri Alexandra ; Guevara-Luna, Marco ; Haque, Sk. Mafizul ; Havenga, Henno ; Herod, Dennis ; Hõrrak, Urmas ; Hussein, Tareq ; Ibarra, Sergio ; Jaimes, Monica ; Kaasik, Marko ; Khaiwal, Ravindra ; Kim, Jhoon ; Kousa, Anu ; Kukkonen, Jaakko ; Kulmala, Markku ; Kuula, Joel ; La Violette, Nathalie ; Lanzani, Guido ; Liu, Xi ; MacDougall, Stephanie ; Manseau, Patrick M. ; Marchegiani, Giada ; McDonald, Brian ; Mishra, Swasti Vardhan ; Molina, Luisa T. ; Mooibroek, Dennis ; Mor, Suman ; Moussiopoulos, Nicolas ; Murena, Fabio ; Niemi, Jarkko V. ; Noe, Steffen ; Nogueira, Thiago ; Norman, Michael ; Pérez-Camaño, Juan Luis ; Petäjä, Tuukka ; Piketh, Stuart ; Rathod, Aditi ; Reid, Ken ; Retama, Armando ; Rivera, Olivia ; Rojas, Néstor Y. ; Rojas-Quincho, Jhojan P. ; San José, Roberto ; Sánchez, Odón ; Seguel, Rodrigo J. ; Sillanpää, Salla ; Su, Yushan ; Tapper, Nigel ; Terrazas, Antonio ; Timonen, Hilkka ; Toscano, Domenico ; Tsegas, George ; Velders, Guus J.M. ; Vlachokostas, Christos ; von Schneidemesser, Erika ; VPM, Rajasree ; Yadav, Ravi ; Zalakeviciute, Rasa ; Zavala, Miguel Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory)

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) Less -
Description:

This global study, which has been coordinated by the World Meteorological Organization Global Atmospheric Watch (WMO/GAW) programme, aims to understand the behaviour of key air pollutant species during the COVID-19 pandemic period of exceptionally low emissions across the globe. We investigated the effects of the differences in both emissions and regional and local meteorology in 2020 compared with the period 2015–2019. By adopting a globally consistent approach, this comprehensive observational analysis focuses on changes in air quality in and around cities across the globe for the following air pollutants PM2.5, PM10, PMC (coarse fraction of PM), NO2, SO2, NOx, CO, O3 and the total gaseous oxidant (OX = NO2 + O3) during the pre-lockdown, partial lockdown, full lockdown and two relaxation periods spanning from January to September 2020. The analysis is based on in situ ground-based air quality observations at over 540 traffic, background and rural stations, from 63 cities and covering 25 countries over seven geographical regions of the world. Anomalies in the air pollutant concentrations (increases or decreases during 2020 periods compared to equivalent 2015–2019 periods) were calculated and the possible effects of meteorological conditions were analysed by computing anomalies from ERA5 reanalyses and local observations for these periods. We observed a positive correlation between the reductions in NO2 and NOx concentrations and peoples’ mobility for most cities. A correlation between PMC and mobility changes was also seen for some Asian and South American cities. A clear signal was not observed for other pollutants, suggesting that sources besides vehicular emissions also substantially contributed to the change in air quality.
Keywords:

[+]

Carbon Monoxide COVID-19 Pandemic, 2020- Nitrogen Dioxide Ozone Sulphur Dioxide
Source:

Environment International, 157: 106818
DOI:

https://doi.org/10.1016/j.envint.2021.106818
Document Type:

Journal Article
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CC BY-NC-ND
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Submitted
Main Document Checksum:

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urn:sha256:ccade4789306320593ee105fa8f1778d67da595ddb565db3eafb146fad4584a8
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https://repository.library.noaa.gov/view/noaa/41009/noaa_41009_DS1.pdf
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A global observational analysis to understand changes in air quality during exceptionally low anthropogenic emission conditions

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