摘要
利用2016年南京市臭氧(O_3)及前体物监测数据,对南京市O_3污染现状、变化特征及其与前体物的关系进行分析。结果表明,2016年南京市O_3超标56 d,超标率15.3%,O_3日最大8 h滑动平均值的第90百分位数为184μg/m~3,超标0.15倍。O_3超标主要集中在4—9月份,日变化呈现"单峰"型特征,峰值出现在14:00,而上午8:00—10:00时段O_3浓度升幅最显著,小时浓度升幅超过20%。前体物VOCs和NO_2浓度变化与O_3呈反相关,且VOCs和NO_2浓度冬季最高,夏季最低,秋季和春季基本相当。
Based on ozone(O_3)and its precursors monitoring data in the urban area of Nanjing in 2016, O_3pollution situations and its variation characteristics, the relationship between O_3 and its precursors were studied. The results showed that there were 56 days of O_3-8 h value exceeded the limit in National Ambient Air Quality Standard(GB 3095—2012), the over standard rate was 15.3%, the 90 th percentile concentration of maximum O_3-8 h value was 184 μg/m~3, which was 0.15 times over the standard value. The days of O_3over standard mainly concentrated from April to September in Nanjing. O_3 diurnal variation showed single peak type, the peak hour appeared at 14:00, O_3 concentration increased the most significantly from 8: 00 a.m. to 10: 00 a.m., the increase of hourly concentration exceeded 20%. The concentrations of VOCs and NO_2 were negative correlated with O_3. The concentrations of VOCs and NO_2 were the highest in winter and lowest in summer, and were basically the same in autumn and spring.
引文
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