葫芦岛近地面臭氧变化特征分析研究

Characteristic of Surface Ozone Concentrations at Huludao

为进一步了解葫芦岛地区臭氧污染,以该市2014年-2016年臭氧(O_3)监测数据为基础分析了O_3浓度变化特征。结果表明:葫芦岛市O_3污染有明显的加重趋势;O_3污染天气集中出现在4～10月;O_3浓度的日变化特征呈现单峰分布,峰值出现在15:00,谷值出现在06:00; O_3前体物(NO、NO_2、CO)浓度休息日低于工作日,O_3浓度休息日高于工作日。日间为环境监测和预报的关键时期。

The characteristics of ozone concentration changes were analyzedbased on the observational data of ozone from 2014 to 2016 in Huludao.The results showed that the pollution of ozone in Huludao was obviously aggravated.The ozone pollution was concentrated in April to October and the daily variation of ozone concentration showed a unimodal distribution.The valley value appeared at 06:00 and the peak value appeared at 15:00.There was a clear“Weekend Effect”in ozone concentration and the concentration of ozone precursors(NO,NO 2,CO)was lower than the working day at weekends.The ozone concentration atweekend was higher than the working day.Daytime is a critical period for environmental monitoring and forecasting.