夏季城市大气O3浓度影响因素及其相关关系

利用2003年夏季济南市区近地面大气O₃、相关前体物和气象因素等观测数据,研究了O₃浓度的分布特征及时间变化规律,分析了7月份O₃与NO、NO₂和CO等前体物及太阳辐射和气温气象条件的相关性.结果表明,济南市区夏季O₃污染比较严重,观测期间各污染物O₃、NO、NO₂、NO_x和CO浓度都相对较高,昼间O₃与各前体物的浓度呈较好的负相关关系,与太阳辐射具有非常明显的相关性,而与气温的相关性不明显.根据以上分析结果,利用回归分析方法,建立了昼间O₃浓度与前体物、气象因子之间的相关模式,结果表明O₃浓度的计算值与观测值符合性较好.

Ozone Pollution,Influence Factors and Their Correlation at Urban Area in Summer

Based on the observational data of near surface O₃,NO,NO₂,CO and meteorological factors in the urban area of Ji'nan during summer 2003,the O₃ concentrations and their temporal variation characteristics were studied.The correlation between O₃ and its precursors(NO,NO₂,CO) and related meteorological factors(solar radiation,temperature) was analyzed.The results show that O₃ pollution during summer was very serious in Ji'nan,and the levels of O₃,NO,NO₂,NO_x and CO were quite high during the observational period.O₃ concentrations were well negatively correlated with NO,NO₂,NO_x and CO during day time.As to the meteorological factors,O₃ concentrations correlated well with solar radiations,but showed no obvious correlation with the temperatures.Consequently,based on the above data and results,a regression equation that relates ozone concentrations observed in the day time to its precursors and solar radiation was constructed.The results show that the calculated values were in good agreement with the observed values.