Progress of Air Pollution Control in China and Its Challenges and Opportunities in the Ecological Civilization Era

Lu, Xi; Zhang, Shaojun; Xing, Jia; Wang, Yunjie; Chen, Wenhui; Ding, Dian; Wang, Yafei; Duan, Lei; Hao, Jiming

doi:10.1016/j.eng.2020.03.014

Cited by 296 publications

(136 citation statements)

References 71 publications

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“…The median values of PM 2.5 decreased monotonically from 2017 to 2020 with substantial drops between 2017 vs 2018 (65.5–55.0), 2018 vs 2020 (55.0–34.0), and 2019 vs 2020 (53.0–34.0) ( Table 5 ). This trend has been observed across China following the 2013 implementation of stricter controls on many emission sources ( Silver et al, 2018 ; Lu et al, 2020b ). All the pairwise differences followed this inter-annual trend.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

COVID-19 pandemic in Wuhan: Ambient air quality and the relationships between criteria air pollutants and meteorological variables before, during, and after lockdown

Sulaymon

Zhang

Hopke

et al. 2021

Atmospheric Research

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Section: Resultsmentioning

confidence: 99%

“…Contrary to the other pollutants, the Kruskal-Wallis test showed that O 3 increased monotonically with differences from one another as had been seen over the recent years ( Lu et al, 2020b ). There were significant differences in median values.…”

Section: Resultsmentioning

confidence: 99%

COVID-19 pandemic in Wuhan: Ambient air quality and the relationships between criteria air pollutants and meteorological variables before, during, and after lockdown

Sulaymon

Zhang

Hopke

et al. 2021

Atmospheric Research

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“…The lockdown caused by the epidemic had a positive impact on environmental air and water quality [3]. Decreases in NO 2 levels over China during lockdown (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25) February 2020) compared to pre-lockdown (1-20 January 2020) were recognized by satellite data from NASA and the European Space Agency [4]. Concentrations of CO and NO 2 in Almaty, Kazakhstan reduced sharply by 49% and 35%, respectively, during the lockdown compared with the pre-lockdown, except O 3 levels mounted by 15% [5].…”

Section: Introductionmentioning

confidence: 99%

“…2020 marks the end of "Three-year Action Plan for the Blue-Sky Defense", ozone pollution is becoming a new environmental problem when China's PM 2.5 governance begins to improve significantly after years of efforts. From 2013 to 2017, the average ozone concentration in 74 major cities increased by 20% [14]. As the provincial capital of Liaoning Province and the economic center of Northeast China, Shenyang has ranked first in ozone pollution compared with other neighboring cities [15,16].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Lockdown on Atmospheric Ozone Pollution Amid the First Half of 2020 in Shenyang, China

Wang

Fang

2020

IJERPH

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During the eruption of COVID-19, a citywide lockdown was executed from 26 January to 23 March 2020, in Shenyang, in which the ozone pollution has recorded significant variations. This paper mainly anatomized the comprehensive characteristics and evolution trends of ozone pollution based on the lockdown period in the first half of 2020. Using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model and cluster analysis method to establish backward trajectories and channels, the spatial transport process of ozone in the preset period and the causation of typical ozone pollution events were investigated in depth. The results demonstrated that: The ozone concentration pollution in the first half of 2020 was increased than last year. During the lockdown period, the basic pollutants levels were lower than that in pre-lockdown under different proportions, except O3 maximum 8-h moving average (MDA8) was increased by 69.7%, accompanied by the delay of daily peak value, increased pollution days and longer pollution cycle. The typical pollution events were highly consistent with the evolution path of fine aerosol compelled by extreme weather. The ozone concentration and the atmospheric oxidation capacity can be stably maintained at a low level when NO2 concentration remained at 50–70 μg/m3, no matter how much the AQI was. Meanwhile, ozone concentration in the downwind suburban was as low as the central city and soared in few stations amid post-lockdown, simultaneous the correlation between ozone and other pollutants converted from negative to positive. The trajectory indicated that the pollution sources during the lockdown and pre-lockdown were basically Southern Russia, Inner Mongolia, and the three provinces of Northeast China, the pollution from the Bohai Sea provoked ozone pollutants in Shenyang to rebound briskly amid post-lockdown, the pollution of neighboring countries and areas would have a stronger impact on air quality under the effect of lockdown.

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“…Along with the rapid development of economy and society, aerosol loading levels across China sharply increased over the past several decades [1]. Although the concentrations of particulate matter in aerodynamic diameter less than or equal to 2.5 µm (PM 2.5 ) have continued to decrease in most cities since 2013, events of haze associated with high aerosol extinction (AE) still occur frequently, especially in the North China Plain (NCP) during the winter [2].…”

Section: Introductionmentioning

confidence: 99%

Measuring the Vertical Profiles of Aerosol Extinction in the Lower Troposphere by MAX-DOAS at a Rural Site in the North China Plain

Cheng

Jin

et al. 2020

Atmosphere

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Ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements were performed during the summer (13 June–20 August) of 2014 at a rural site in North China Plain. The vertical profiles of aerosol extinction (AE) in the lower troposphere were retrieved to analyze the temporal variations of AE profiles, near-surface AE, and aerosol optical depth (AOD). The average AOD and near-surface AE over the period of study were 0.51 ± 0.26 and 0.33 ± 0.18 km−1 during the effective observation period, respectively. High AE events and elevated AE layers were identified based on the time series of hourly AE profiles, near-surface AEs and AODs. It is found that in addition to the planetary boundary layer height (PBLH) and relative humidity (RH), the variations in the wind field have large impacts on the near-surface AE, AOD, and AE profile. Among 16 wind sectors, higher AOD or AE occur mostly in the directions of the cities upstream. The diurnal variations of the AE profiles, AODs and near-surface AEs are significant and influenced mainly by the source emissions, PBLH, and RH. The AE profile shape from MAX-DOAS measurement is generally in agreement with that from light detection and ranging (lidar) observations, although the AE absolute levels are different. Overall, ground-based MAX-DOAS can serve as a supplement to measure the AE vertical profiles in the lower troposphere.

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Progress of Air Pollution Control in China and Its Challenges and Opportunities in the Ecological Civilization Era

Cited by 296 publications

References 71 publications

COVID-19 pandemic in Wuhan: Ambient air quality and the relationships between criteria air pollutants and meteorological variables before, during, and after lockdown

COVID-19 pandemic in Wuhan: Ambient air quality and the relationships between criteria air pollutants and meteorological variables before, during, and after lockdown

Assessing the Impact of Lockdown on Atmospheric Ozone Pollution Amid the First Half of 2020 in Shenyang, China

Measuring the Vertical Profiles of Aerosol Extinction in the Lower Troposphere by MAX-DOAS at a Rural Site in the North China Plain

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