Temporal and spatial variation characteristics of PM10 and PM2.5 mass concentration in Luoyang city and their relationship with meteorological factors

doi:10.14088/j.cnki.issn0439-8114.2021.20.007

Abstract

Abstract: Based on the mass concentration monitoring data of PM_2.5 and PM₁₀ from seven state-controlled air quality monitoring stations in Luoyang city from 2017 to 2019, the temporal and spatial variation characteristics of atmospheric particulate concentration and the influence of meteorological factors on it in the urban area of Luoyang city were studied. The results showed that the overall situation of environmental air pollution in Luoyang city urban area from 2017 to 2019 showed a trend of first decreasing and then increasing. Among them, the overall situation of air quality in 2018 was the best, and the number of severely polluted days and above accounted for the lowest proportion of the effective days of the year; The number of polluted days decreased by 10 days compared with 2017, but increased by 31 days compared with 2018; The overall air quality situation of PM₁₀ and PM_2.5 concentration changes in monthly averages were basically the same, and the changes in concentration were in a U-shaped distribution; PM₁₀ and PM_2.5the mass concentration changes had obvious seasonal characteristics. The mass concentration in winter was the highest, followed by spring and autumn, and the lowest in summer; The mass concentrations of PM_2.5 and PM₁₀ at the control sites in various countries also showed high in winter, followed by spring and autumn, and low in summer, the air pollution situation as a whole presented the distribution characteristics of high in northwest and low in southeast; Analysis of meteorological factors showed that ρ（PM_2.5） and ρ（PM₁₀） were negatively correlated with temperature; Relative humidity was negatively correlated with the mass concentration of PM₁₀, but it was positively correlated with the mass concentration of PM_2.5. When the relative humidity was 60%~70%, the mass concentration of PM_2.5 was greater; The mass concentration of PM_2.5 and PM₁₀ in the wind direction was southerly and southeast-southern, south-southwest wind and west-southwest wind were smaller. The changes in air pollution in Luoyang city from 2017 to 2019 were related to terrain, meteorological conditions and urbanization.

Key words: PM_2.5, PM₁₀, temporal and spatial distribution, Luoyang city

CLC Number:

X513

ZHAO Jia-lun, ZHOU Shi-feng, LEI Ya-kai, FENG Yan, LIU Yi-ping, KONG De-zheng. Temporal and spatial variation characteristics of PM₁₀ and PM_2.5 mass concentration in Luoyang city and their relationship with meteorological factors[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(20): 35-42.

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Temporal and spatial variation characteristics of PM₁₀ and PM_2.5 mass concentration in Luoyang city and their relationship with meteorological factors

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