This study used a 13-year series of hourly and daily data collected over the winter period to determine the temporal distribution and variability of nitrogen oxides in the ground atmosphere of a city. The study objective was to distinguish the types of diurnal variation of the analyzed air pollutants and assess them depending on the changes in meteorological conditions in 2005–2018. The highest daily levels of nitrogen oxides were recorded by sensors in the morning, between 7 am and 9 am, and in the evening, between 5 pm and 8 pm. Standardized hourly concentrations of NO₂ > 200 μg m⁻³ in 2005–2018 were recorded on several occasions between 6 pm and 12 am. Six types of diurnal variation of the analyzed nitrogen oxides were distinguished, in which the highest levels were recorded at different times of the day. The highest levels of nitrogen oxides were in types C1 and C2, and the lowest were in types B1 and B2, with the most significant difference being in the NO concentration. There was a significant relationship between the nitrogen oxides concentration in the types of diurnal variation and meteorological indicators, with wind speed having the greatest impact on the nitrogen oxides concentration.

这项研究使用了冬季期间收集的13年每小时和每天的系列数据来确定城市地面大气中氮氧化物的时间分布和变化性。研究目的是区分所分析的空气污染物的日变化类型，并根据2005-2018年的气象条件变化对其进行评估。每天早上7点至9点之间以及晚上5点至8点之间的传感器记录了每天最高的氮氧化物含量。NO _2的标准小时浓度 > 200μgm ^-3在2005年至2018年期间的下午6点至凌晨12点之间记录了好几次。区分了六种类型的氮氧化物的日变化，其中在一天的不同时间记录了最高水平。氮氧化物的最高含量出现在C1和C2类型中，最低的出现在B1和B2类型中，其中最大的差异在于NO浓度。昼夜变化类型中氮氧化物的浓度与气象指标之间存在显着的关系，风速对氮氧化物的浓度影响最大。