Influence of transboundary air pollution and meteorology on air quality in three major cities of Anhui Province, China

Sulaymon, Ishaq Dimeji; Zhang, Yuanxun; Hopke, Philip K.; Hu, Jianlin; Rupakheti, Dipesh; Xie, Xiaodong; Zhang, Yang; Ajibade, Fidelis Odedishemi; Hua, Jian; She, Yongliang

doi:10.1016/j.jclepro.2021.129641

Cited by 21 publications

(24 citation statements)

References 30 publications

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“…The negative correlation of O 3 with NO 2 can be explained by studying the tropospheric chemistry where the reaction of O 3 with NO leads to the formation of NO 2 thereby depleting O 3 [ 69 ]. These results comply with previously reported findings [ 10 , 55 ].…”

Section: Resultssupporting

confidence: 94%

“…This correlation is relatively stronger in the spring and autumn seasons. Similar results were reported in previous studies [ 10 , 56 ]. The rate of formation of O 3 is higher when temperature increases, as photolytic activity is increased which helps in the formation of secondary pollutant O 3 [ 11 , 57 ].…”

Section: Resultssupporting

confidence: 93%

“…The primary emissions from anthropogenic sources are the trace gases such as NO 2 , SO 2 , and carbon monoxide (CO) [ 9 ]. Industrial emissions, fossil fuel combustion, and biofuels act as the major sources of SO 2 and CO [ 10 ]. Both CO and NO x act as the main precursors of O 3 , whereas NO X and SO 2 are significant towards the production of secondary inorganic aerosols [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…China has established more than 1500 stations for air quality monitoring since 2013, with a prime focus on monitoring different trace gases and particulate matter, i.e., PM 2.5 , PM 10 , NO 2 , SO 2 , O 3 , and CO [10][11][12][13]. The measurements taken at these monitoring stations have been used to analyze the characteristics of different air pollution episodes in various regions of China including the Yangtze River Delta (YRD) region [10][11][12]14].…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal characterization of aerosols and trace gases over the Yangtze River Delta region, China: impact of trans-boundary pollution and meteorology

et al. 2022

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Background The spatiotemporal variation of observed trace gases (NO2, SO2, O3) and particulate matter (PM2.5, PM10) were investigated over cities of Yangtze River Delta (YRD) region including Nanjing, Hefei, Shanghai and Hangzhou. Furthermore, the characteristics of different pollution episodes, i.e., haze events (visibility < 7 km, relative humidity < 80%, and PM2.5 > 40 µg/m3) and complex pollution episodes (PM2.5 > 35 µg/m3 and O3 > 160 µg/m3) were studied over the cities of the YRD region. The impact of China clean air action plan on concentration of aerosols and trace gases is examined. The impacts of trans-boundary pollution and different meteorological conditions were also examined. Results The highest annual mean concentrations of PM2.5, PM10, NO2 and O3 were found for 2019 over all the cities. The annual mean concentrations of PM2.5, PM10, and NO2 showed continuous declines from 2019 to 2021 due to emission control measures and implementation of the Clean Air Action plan over all the cities of the YRD region. The annual mean O3 levels showed a decline in 2020 over all the cities of YRD region, which is unprecedented since the beginning of the China’s National environmental monitoring program since 2013. However, a slight increase in annual O3 was observed in 2021. The highest overall means of PM2.5, PM10, SO2, and NO2 were observed over Hefei, whereas the highest O3 levels were found in Nanjing. Despite the strict control measures, PM2.5 and PM10 concentrations exceeded the Grade-1 National Ambient Air Quality Standards (NAAQS) and WHO (World Health Organization) guidelines over all the cities of the YRD region. The number of haze days was higher in Hefei and Nanjing, whereas the complex pollution episodes or concurrent occurrence of O3 and PM2.5 pollution days were higher in Hangzhou and Shanghai. The in situ data for SO2 and NO2 showed strong correlation with Tropospheric Monitoring Instrument (TROPOMI) satellite data. Conclusions Despite the observed reductions in primary pollutants concentrations, the secondary pollutants formation is still a concern for major metropolises. The increase in temperature and lower relative humidity favors the accumulation of O3, while low temperature, low wind speeds and lower relative humidity favor the accumulation of primary pollutants. This study depicts different air pollution problems for different cities inside a region. Therefore, there is a dire need to continuous monitoring and analysis of air quality parameters and design city-specific policies and action plans to effectively deal with the metropolitan pollution.

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Section: Resultssupporting

confidence: 94%

Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatiotemporal characterization of aerosols and trace gases over the Yangtze River Delta region, China: impact of trans-boundary pollution and meteorology

et al. 2022

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“…Du et al ( 2020 ) provided a global estimate of the degree of transboundary air pollution caused by coal-fired power generation. Sulaymon et al ( 2021 ) investigated the impact of transboundary air pollution on air quality in some parts of China, including Anhui Province. Many studies have shown that the HYSPLIT model can not only simulate the long-distance migration path of pollutants with the characteristics of air flow (Lin et al 2009 ) but can also simulate concentration diffusion and pollutant deposition with the Euler method for pollutant emissions (Omidvar et al 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Migration and diffusion characteristics of air pollutants and meteorological influences in Northwest China: a case study of four mining areas

Huang

Zhang

2022

Environ Sci Pollut Res

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Reveal persistent haze pollution episodes in hefei: a perspective from ground-based and satellite observation

Fang,

Yang,

et al. 2024

Air Qual Atmos Health

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Influence of transboundary air pollution and meteorology on air quality in three major cities of Anhui Province, China

Cited by 21 publications

References 30 publications

Spatiotemporal characterization of aerosols and trace gases over the Yangtze River Delta region, China: impact of trans-boundary pollution and meteorology

Spatiotemporal characterization of aerosols and trace gases over the Yangtze River Delta region, China: impact of trans-boundary pollution and meteorology

Migration and diffusion characteristics of air pollutants and meteorological influences in Northwest China: a case study of four mining areas

Reveal persistent haze pollution episodes in hefei: a perspective from ground-based and satellite observation

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