Meteorological mechanisms of regional PM2.5 and O3 transport in the North China Plain driven by the East Asian monsoon

Liu, Shuang; Zhao, Wei; Jin, Jiannan; Li, Tianze; Xu, Hui; Zhao, Wenji

doi:10.1016/j.apr.2022.101638

Cited by 10 publications

(1 citation statement)

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“…As an important indicator to evaluate the contribution of mobile sources, the potential sources of NO 2 were mainly distributed between Beijing and Tangshan, suggesting that high-intensity anthropogenic activities may occur in these areas [61]. Affected by the northerly winter wind during the East Asian monsoon, O 3 and its precursors from the cold inland part of northern China were transmitted to Tangshan through long-distance transportation [62].…”

Section: Impact Of the Regional Transportmentioning

confidence: 99%

Analysis of Factors Influencing Air Quality in Different Periods during COVID-19: A Case Study of Tangshan, China

Shan

Liu

et al. 2023

IJERPH

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This study aimed to analyze the main factors influencing air quality in Tangshan during COVID-19, covering three different periods: the COVID-19 period, the Level I response period, and the Spring Festival period. Comparative analysis and the difference-in-differences (DID) method were used to explore differences in air quality between different stages of the epidemic and different years. During the COVID-19 period, the air quality index (AQI) and the concentrations of six conventional air pollutants (PM2.5, PM10, SO2, NO2, CO, and O3-8h) decreased significantly compared to 2017–2019. For the Level I response period, the reduction in AQI caused by COVID-19 control measures were 29.07%, 31.43%, and 20.04% in February, March, and April of 2020, respectively. During the Spring Festival, the concentrations of the six pollutants were significantly higher than those in 2019 and 2021, which may be related to heavy pollution events caused by unfavorable meteorological conditions and regional transport. As for the further improvement in air quality, it is necessary to take strict measures to prevent and control air pollution while paying attention to meteorological factors.

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Section: Impact Of the Regional Transportmentioning

confidence: 99%