Abstract The problem of air quality in Warsaw is related with the emission of pollutants from combustion of coal or natural gas in winter and it is a different situation than in other capitals in EU, where transportation is the main source of pollution to the air. In Warsaw, the impact of traffic emission on air quality is clearly visible in the warm season of the year. Therefore, it is important to analyse and establish the causes (indication of sources) of high concentrations of ozone and the associated meteorological conditions, and then at a later stage purpose actions to reduce them. This work analyses the temporal variation of ozone and its precursors, the main traffic pollutants in the studied area, and investigates the relationship between meteorological parameters and urban air pollutants, using various statistical methods. For selected smog episodes during heat waves, backward trajectories have been completed to identify potential sources of pollution inflow. The traffic emission has the greatest share in the variance of the system, which in the case of night-time data analysis equal to 30.7%, 27.1% for the daytime of measurement and 23.6% for the entire period. This episodes of high ozone concentration were predominantly due to local photochemistry because all the meteorological conditions were conducive for ozone formation particularly during daytime.

中文翻译：

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城市环境中的对流层臭氧评估——华沙特定热浪案例研究

摘要 华沙的空气质量问题与冬季煤炭或天然气燃烧排放污染物有关，与欧盟其他首都不同，交通是空气污染的主要来源。在华沙，交通排放对空气质量的影响在一年中的温暖季节清晰可见。因此，重要的是分析和确定高浓度臭氧和相关气象条件的原因（来源指示），然后在稍后阶段采取行动减少它们。这项工作分析了研究区域主要交通污染物臭氧及其前体的时间变化，并使用各种统计方法研究了气象参数与城市空气污染物之间的关系。对于热浪期间选定的烟雾事件，已经完成了向后轨迹，以确定潜在的污染流入源。交通排放在系统方差中的份额最大，在夜间数据分析的情况下为 30.7%，测量白天为 27.1%，整个期间为 23.6%。这种高臭氧浓度事件主要是由于局部光化学作用造成的，因为所有气象条件都有利于臭氧的形成，尤其是在白天。整个期间为 6%。这种高臭氧浓度事件主要是由于局部光化学作用造成的，因为所有气象条件都有利于臭氧的形成，尤其是在白天。整个期间为 6%。这种高臭氧浓度事件主要是由于局部光化学作用造成的，因为所有气象条件都有利于臭氧的形成，尤其是在白天。