辽宁省臭氧质量浓度变化研究

Study on the Change of Ozone Concentration in Liaoning Province

为了解辽宁地区臭氧(O3)污染的分布特征以及与其他环境因子的相关关系,对辽宁地区15个城市2014—2019年环境污染监测数据和气象数据进行了统计分析。分别分析15个城市O3质量浓度的年际变化,详细分析了各年全省O3质量浓度的区域分布、超标情况,并且和当年的全国平均值进行了比较。进行了2014—2019年全省平均的月均质量浓度统计,并且从气象条件的影响分析了O3月分布的成因。利用ArcGIS软件分析辽宁省O3-8 h年均值和O3-8 h-90地理分布特征,并和区域经济发展分布格局进行了对比。为了得到O3与其他环境因子的作用关系,利用SPSS软件对O3质量浓度和PM2.5、PM10、CO、NO2、SO2、AQI监测值进行了相关性统计对比。最后分不同的相对湿度范围,统计O3超标的情况,得出相对湿度对O3污染的影响。结果表明:2014—2017年O3污染总体上呈加重趋势,2018年、2019年呈减轻趋势。5—8月O3污染最为严重,5月超标天数最多,O3质量浓度6月最高。在空间分布中,辽宁西部沿海、中部城市群、南部地区O3质量浓度较高,东南部地区O3质量浓度较低,这与人口、经济发展水平分布表现一致。在与其他大气污染物的相关分析中,O3质量浓度与PM2.5、PM10、CO、NO2、SO2均呈显著负相关,与AQI值显著正相关。另外在相对湿度40%—80%时O3质量浓度随相对湿度升高而增大,相对湿度超过80%时O3质量浓度下降。

In order to understand the distribution characteristics of ozone(O3)pollution in Liaoning Province and the related impact of other environmental factors,the monitoring data of environmental pollution and meteorological data in 15 cities in Liaoning Province from 2014 to 2019 were analyzed.The interannual variation of O3 concentration in 15 cities was analyzed,and the regional distribution and exceeding standard of O3 concentration were analyzed in detail,and compared with the national average value of that year.The average monthly concentration statistics of the whole province from 2014 to 2019 are carried out,and the causes of the monthly distribution of O3 are analyzed from the influence of meteorological conditions.ArcGIS software was used to analyze the geographical distribution characteristics of O3-8 h and O3-8 h-90 in Liaoning Province,and compared with the distribution pattern of regional economic development.In order to get the relationship between O3 and other environmental factors,the correlation between O3 concentration and PM2.5,PM10,CO,NO2,SO2 and AQI was statistically compared by SPSS software.Finally,according to different relative humidity range,the situation of O3 exceeding the standard was counted,and the influence of relative humidity on O3 pollution was obtained.The results show:In 2014–2017,the O3 pollution is generally increasing,and in 2018 and 2019,it is decreasing.From May to August,O3 pollution was the most serious,the days exceeding the standard in May were the most,and O3 concentration was the highest in June.In the spatial distribution,the concentration of O3 is higher in the western coastal area of Liaoning,the surrounding urban agglomeration of Shenyang and the southern area.The concentration of O3 is low in the southeast area.These are consistent with the distribution of population and economic development level.In the correlation analysis with other air pollutants,O3 concentration was negatively correlated with PM2.5,PM10,CO,NO2 and SO2,and positively correlated with AQI.In addition,when the relative humidity is 40%–80%,the concentration of O3 increases with the increase of relative humidity.When the relative humidity is over 80%,the concentration of O3 decreases.