泸州市城区2021年PM_(2.5)和O_(3)时空分布特征

Characteristics of Temporal and Spatial Distribution of PM_(2.5) and O_(3) in Luzhou in 2021

分析泸州市城区PM_(2.5)和O_(3)时空分布特征。利用2021年泸州市4个空气监测站点PM_(2.5)和O_(3)质量浓度数据,分析污染物浓度水平及其时空分布特征。结果显示:2021年泸洲城区PM_(2.5)与O_(3)浓度分别为40.6μg/m^(3)、137μg/m^(3),超标天数分别为39天、18天,超标率分别为10.7%、4.9%。PM_(2.5)浓度冬季最高,夏季最低;O_(3)浓度夏季最高,冬季最低。在PM_(2.5)与O_(3)污染季节,PM_(2.5)与O_(3)两者不存在相关性。市环监站监测点PM_(2.5)与O_(3)浓度最低,分别为38.7μg/m^(3)、131μg/m^(3)。各站点之间PM_(2.5)与O_(3)浓度差异值较小(分别在0.01~0.04,0.003~0.03)。泸州市城区PM_(2.5)和O_(3)处在轻度污染状态。

To investigate the characteristics of spatial distribution and variations of PM_(2.5) and O_(3) in Luzhou.Based on the mass concentration data of PM_(2.5) and O_(3) of meteorological data of four environment al monitoring stations in 2021,the temporal variation characteristics and distribution rules of PM_(2.5) and O_(3)in Luzhou were studied to analyze the characteristics of spatial distribution and variations.The results showed that the mean concentrations of PM_(2.5) and O_(3) in Luzhou urban area in 2021 were 40.6 and 137μg/m^(3),respectively.The number of days exceeded the standard was 39 and 18 days,respectively.The over-standard rates are 10.7%and 4.9%,respectively.PM_(2.5) concentration was the highest in winter and the lowest in summer.The concentration of O_(3) was highest in summer and lowest in winter.During the PM_(2.5) and O_(3) pollution seasons,there was no correlation between them.The concentrations of PM_(2.5) and O_(3) was the lowest in Site 2(environmental monitoring station),38.7μg/m^(3) and 131μg/m^(3),respectively.The difference values of PM_(2.5) and O_(3) concentrations during different stations are 0.01~0.04 and 0.003~0.03,respectively.and the concentration difference of each station was small.PM_(2.5) and O_(3) are slightly polluted in Luzhou City.