Spatial and temporal distribution characteristics of ground-level nitrogen dioxide and ozone across China during 2015–2020
Bibliographic Data
| ID | 15547428 |
|---|---|
| Authors | Yanfen Li (0000-0002-7777-7518, East China Normal University), Guitao Shi (0000-0003-1702-6322, East China Normal University, corresponding author), Zhenlou Chen (0000-0002-2930-2833, State Key Laboratory of Estuarine and Coastal Research) |
| Year | 2021 |
| Volume | 16 |
| Issue | 12 |
| Pages | 124031-124031 |
| Publication date | 2021-11-08 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/ac3794 |
| OpenAlex | W3211681922 |
| Language | EN |
| References cited | 72 |
In recent years, the emissions control in nitrogen oxides (NO x ) was conducted across China, but how the concentrations of NO x and its product ozone (O 3 ) in the atmosphere varied in space and time remains uncertain. Here, the spatial and temporal distributions of nitrogen dioxide (NO 2 ) and O 3 in 348 cities of China based on the hourly concentrations data during 2015–2020 were investigated, and the relationships among NO 2 , O 3 and meteorological and socioeconomic parameters were explored. It is shown that higher NO 2 and O 3 concentrations were mainly distributed in North, East and Central China, which are economically developed and densely populated regions. The annual mean concentrations of NO 2 increased from 2015 to 2017 but decreased from 2017 to 2020. The annual variations in O 3 generally exhibited an upward trend in 2015–2019 but decreased by 5% from 2019 to 2020. About 74% and 78% of cities had a decline in NO 2 and O 3 in 2020, respectively, compared to 2019, due to the limits of the motorized transports and industrial production activities during COVID-19 lockdown. The monthly mean concentrations of NO 2 showed an unusual decrease in February in all regions due to the reduced emissions during the Chinese Spring Festival holidays. Compared to 2019, the mean concentrations of NO 2 in January, February and March, 2020 during COVID-19 lockdown decreased by 16%, 28% and 20%, respectively; O 3 increased by 13% and 14% in January and February, respectively, but decreased by 2% in March, 2020. NO 2 and O 3 concentrations are likely associated with anthropogenic and natural emissions. In addition, meteorological parameters can affect NO 2 and O 3 concentrations by influencing the production process, the diffusion and local accumulation, and the regional circulations
Atmosphere (unit · Atmospheric sciences · China · Climatology · Coronavirus disease 2019 (COVID-19 · Geography · Meteorology · Nitrogen · Nitrogen dioxide · Nitrogen oxides · Ozone · Physical geography · Spatial distribution · Air Quality and Health Impacts · Atmospheric chemistry and aerosols · Chemistry · COVID-19 impact on air quality · Environmental Science · Medicine
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| Citation velocity | historical |
|---|---|
| Highly cited | No |