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Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry

Carbonaceous aerosol is one of the main components of atmospheric particulate matter, which is of great significance due to its role in climate change, earth's radiation balance, visibility, and human health. In this work, carbonaceous aerosols were measured in Shijiazhuang and Beijing using th...

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Detalles Bibliográficos
Autores principales: Feng, Zemin, Zheng, Feixue, Liu, Yongchun, Fan, Xiaolong, Yan, Chao, Zhang, Yusheng, Daellenbach, Kaspar R., Bianchi, Federico, Petäjä, Tuukka, Kulmala, Markku, Bao, Xiaolei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier B.V. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8651497/
https://www.ncbi.nlm.nih.gov/pubmed/34875334
http://dx.doi.org/10.1016/j.scitotenv.2021.152191
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author Feng, Zemin
Zheng, Feixue
Liu, Yongchun
Fan, Xiaolong
Yan, Chao
Zhang, Yusheng
Daellenbach, Kaspar R.
Bianchi, Federico
Petäjä, Tuukka
Kulmala, Markku
Bao, Xiaolei
author_facet Feng, Zemin
Zheng, Feixue
Liu, Yongchun
Fan, Xiaolong
Yan, Chao
Zhang, Yusheng
Daellenbach, Kaspar R.
Bianchi, Federico
Petäjä, Tuukka
Kulmala, Markku
Bao, Xiaolei
author_sort Feng, Zemin
collection PubMed
description Carbonaceous aerosol is one of the main components of atmospheric particulate matter, which is of great significance due to its role in climate change, earth's radiation balance, visibility, and human health. In this work, carbonaceous aerosols were measured in Shijiazhuang and Beijing using the OC/EC analyzer from December 1, 2019 to March 15, 2020, which covered the Coronavirus Disease 2019 (COVID-19) pandemic. The observed results show that the gas-phase pollutants, such as NO, NO(2), and aerosol-phase pollutants (Primary Organic Compounds, POC) from anthropogenic emissions, were significantly reduced during the lockdown period due to limited human activities in North China Plain (NCP). However, the atmospheric oxidation capacity (Ox/CO) shows a significantly increase during the lockdown period. Meanwhile, additional sources of nighttime Secondary Organic Carbon (SOC), Secondary Organic Aerosol (SOA), and b(abs, BrC)(370 nm) are observed and ascribed to the nocturnal chemistry related to NO(3) radical. The Potential Source Contribution Function (PSCF) analysis indicates that the southeast areas of the NCP region contributed more to the SOC during the lockdown period than the normal period. Our results highlight the importance of regional nocturnal chemistry in SOA formation.
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spelling pubmed-86514972021-12-08 Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry Feng, Zemin Zheng, Feixue Liu, Yongchun Fan, Xiaolong Yan, Chao Zhang, Yusheng Daellenbach, Kaspar R. Bianchi, Federico Petäjä, Tuukka Kulmala, Markku Bao, Xiaolei Sci Total Environ Article Carbonaceous aerosol is one of the main components of atmospheric particulate matter, which is of great significance due to its role in climate change, earth's radiation balance, visibility, and human health. In this work, carbonaceous aerosols were measured in Shijiazhuang and Beijing using the OC/EC analyzer from December 1, 2019 to March 15, 2020, which covered the Coronavirus Disease 2019 (COVID-19) pandemic. The observed results show that the gas-phase pollutants, such as NO, NO(2), and aerosol-phase pollutants (Primary Organic Compounds, POC) from anthropogenic emissions, were significantly reduced during the lockdown period due to limited human activities in North China Plain (NCP). However, the atmospheric oxidation capacity (Ox/CO) shows a significantly increase during the lockdown period. Meanwhile, additional sources of nighttime Secondary Organic Carbon (SOC), Secondary Organic Aerosol (SOA), and b(abs, BrC)(370 nm) are observed and ascribed to the nocturnal chemistry related to NO(3) radical. The Potential Source Contribution Function (PSCF) analysis indicates that the southeast areas of the NCP region contributed more to the SOC during the lockdown period than the normal period. Our results highlight the importance of regional nocturnal chemistry in SOA formation. Elsevier B.V. 2022-02-20 2021-12-05 /pmc/articles/PMC8651497/ /pubmed/34875334 http://dx.doi.org/10.1016/j.scitotenv.2021.152191 Text en © 2021 Elsevier B.V. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Feng, Zemin
Zheng, Feixue
Liu, Yongchun
Fan, Xiaolong
Yan, Chao
Zhang, Yusheng
Daellenbach, Kaspar R.
Bianchi, Federico
Petäjä, Tuukka
Kulmala, Markku
Bao, Xiaolei
Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry
title Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry
title_full Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry
title_fullStr Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry
title_full_unstemmed Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry
title_short Evolution of organic carbon during COVID-19 lockdown period: Possible contribution of nocturnal chemistry
title_sort evolution of organic carbon during covid-19 lockdown period: possible contribution of nocturnal chemistry
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8651497/
https://www.ncbi.nlm.nih.gov/pubmed/34875334
http://dx.doi.org/10.1016/j.scitotenv.2021.152191
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