About: Influence of Chinese New Year overlapping COVID-19 lockdown on HONO sources in Shijiazhuang

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An Entity of Type : schema:ScholarlyArticle, within Data Space : wasabi.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	Influence of Chinese New Year overlapping COVID-19 lockdown on HONO sources in Shijiazhuang
Creator	Zhang, Liang Jiang, Tao Bao, Xiaolei Fan, Xiaolong Feng, Haibo Feng, Zeming Liu, Yongchun Ni, Shuangying Xing, Shubin Zhang, Yusheng
Source	Elsevier; Medline; PMC
abstract	Abstract Nitrous acid (HONO) is an important precursor of hydroxyl radical (OH) in the atmosphere. It is also toxic to human health. In this work, HONO concentrations were measured in Shijiazhuang using a Monitor for AeRosols and Gases in ambient Air (MARGA) from December 15, 2019 to March 15, 2020, which covered the heavy air pollution season, the Chinese New Year (CNY) vocation and the Corona Virus Disease-19 (COVID-19) lockdown period. During & after CNY overlapping COVID-19 lockdown, the air quality was significantly improved because of both the emission reduction and the increase in diffusion ability of air masses. The mean HONO concentration was 2.43 ± 1.08 ppbv before CNY, while it decreased to 1.53 ± 1.16 ppbv during CNY and 0.97 ± 0.76 ppbv after CNY. The lockdown during & after CNY reduced ~31% of ambient HONO along with ~62% of NO and ~36% of NO2 compared with those before CNY after the improvement of diffusion ability had been taken into consideration. Heterogeneous reaction of NO2 on ground surface dominated the nocturnal HONO sources, followed by heterogeneous reaction on aerosol surface, vehicle emission, reaction between NO and OH and emission from soil on pollution days throughout the observation. Except for elevated soil emission, other nighttime HONO sources and sinks decreased significantly during & after CNY. The relative importance of heterogeneous reaction of NO2 on surfaces further increased because of both the decrease in vehicle emission and the increase in the heterogeneous conversion kinetics from NO2 to HONO during & after CNY.
has issue date	2020-07-21(xsd:dateTime)
bibo:doi	10.1016/j.scitotenv.2020.141025
bibo:pmid	32738691
has license	els-covid
sha1sum (hex)	5a70df1db0dda7921e9996c3cdc93b15c02e6e98
schema:url	https://doi.org/10.1016/j.scitotenv.2020.141025
resource representing a document's title	Influence of Chinese New Year overlapping COVID-19 lockdown on HONO sources in Shijiazhuang
has PubMed Central identifier	PMC7371585
has PubMed identifier	32738691
schema:publication	Sci Total Environ
resource representing a document's body	covid:5a70df1db0dda7921e9996c3cdc93b15c02e6e98#body_text
is schema:about of	named entity 'ppbv' named entity 'CNY' named entity 'HONO' named entity 'CNY' named entity 'HONO' named entity 'emission reduction' named entity 'CNY' named entity 'CNY' named entity 'heterogeneous' named entity 'period' named entity 'reaction' named entity 'Journal' named entity 'air quality' named entity 'CNY' named entity 'ambient' named entity 'consideration' named entity 'COVID-19' named entity 'Influence' named entity 'Shijiazhuang' named entity 'HONO' named entity 'Chinese New Year' named entity 'HONO' named entity 'CNY' named entity 'nocturnal' named entity 'HONO' named entity 'pollution' named entity 'hydroxyl radical' named entity 'Nitrous acid' named entity 'Corona Virus Disease-19' named entity 'heterogeneous reaction' named entity 'HONO' named entity 'COVID-19 lockdown' named entity 'Shijiazhuang' named entity 'Chinese New Year' named entity 'Shijiazhuang' named entity 'CNY' named entity 'ppbv' named entity 'nitrate' named entity 'Shijiazhuang' named entity 'HONO' named entity 'HONO' named entity 'NO2' named entity 'ppbv' named entity 'photolysis' named entity 'CNY' named entity 'polluted days' named entity 'CNY' named entity 'HONO' named entity 'NO2' named entity 'aerosol' named entity 'photolysis' named entity 'HONO' named entity 'HONO' named entity 'Shijiazhuang' named entity 'PM 2.5' named entity 'Honrath' named entity 'molecule' named entity 'HONO' named entity 'HONO' named entity 'HONO' named entity 'CNY' named entity 'pptv' named entity 'urban environment' named entity 'CNY' named entity 'CNY' named entity 'CNY' named entity 'CNY' named entity 'Shijiazhuang' named entity 'PM 2.5' named entity 'Shijiazhuang' named entity 'photolysis' named entity 'HONO'

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