LAN Linhui,ZHANG Xiaoling,WANG Chuanyang,et al.Comparative Analysis of Summer Ozone Pollution and Meteorological Factors Threshold in Chengdu and Chongqing[J].Journal of Chengdu University of Information Technology,2026,41(02):236-245.[doi:10.16836/j.cnki.jcuit.2026.02.015]
成渝两地夏季臭氧污染与气象条件阈值对比分析
- Title:
- Comparative Analysis of Summer Ozone Pollution and Meteorological Factors Threshold in Chengdu and Chongqing
- 文章编号:
- 2096-1618(2026)02-0236-10
- Keywords:
- ozone suppression events; meteorological factor; high temperatures; Chengdu-Chongqing area
- 分类号:
- X515
- 文献标志码:
- A
- 摘要:
- 利用2021-2022年夏季空气质量监测数据和气象数据,研究不同气象条件下成渝两地O3(臭氧)污染特征差异。结果表明:(1)成都地区日最大8 h滑动平均(O3-8 h)浓度和超标率整体上高于重庆地区,重庆地区气温及风速明显高于成都地区,成都地区相对湿度更高,2022年两地气温上升对O3浓度有较大影响。(2)成渝两地气温及风速与臭氧变化趋势一致,相对湿度趋势相反。PM2.5、CO和NO2的浓度与O3浓度呈负相关。成都地区PM2.5浓度高于重庆地区,而CO及NO2浓度均低于重庆地区。(3)成都地区气温在36 ℃～38 ℃时O3浓度有最大值,重庆地区O3浓度在气温为38 ℃～40 ℃时无明显变化。O3浓度与相对湿度呈负相关关系,且两地相对湿度达到60%～70%时,O3浓度明显降低,风速为2.5～3 m/s时两地O3浓度均有最大值。最利于成都地区高浓度O3形成的气象条件为:气温32 ℃～38 ℃,相对湿度30%～60%,风速0.5～3 m/s,重庆地区:气温36 ℃～40 ℃,相对湿度30%～50%,风速0.6～2.8 m/s。(4)利用Loess回归将成渝两地气温和O3浓度逐小时数据进行拟合,得到成都和重庆发生O3抑制性事件的气温临界值分别是37.3 ℃和38.4 ℃。
- Abstract:
- The differences in ozone pollution characteristics between Chengdu and Chongqing under different meteorological conditions were investigated using summer air quality monitoring data and meteorological data from 2013 to 2022. The results show that:(1)TheO3-8 h concentrations and over-standard rates in Chengdu were higher than those in Chongqing as a whole.Furthermore, the temperature and wind speed in Chongqing are significantly higher than those in Chengdu, while the opposite trend is reflected in the relative humidity, and the temperature increase in 2022 will have a greater impact on O3 concentrations in the two areas.(2)Air temperature and wind speed were in the same trend as ozone in both Chengdu and Chongqing, while relative humidity displayed an inverse trend.A negative correlation was observed between the concentrations of PM2.5, CO, and NO2 and that of O3. The concentration of PM2.5 in Chengdu was found to be higher than that in Chongqing, while the concentrations of CO and NO2 were lower than in Chongqing.(3)The concentration of O3 in Chengdu reaches its maximum with the temperature of 36 ℃-38 ℃, and then decreases with further temperature increase, while there is no obvious change in the O3 concentration in Chongqing. O3 concentration is negatively correlated with relative humidity; it decreases clearly when relative humidity is exceeds 60%-70% in both Chengdu and Chongqing. O3 concentration in two places reaches up to its maximum value at wind speeds of 2.5-3 m/s. The concentration of PM2.5 in Chengdu is higher than that in Chongqing, while the concentrations of CO and NO2 in Chengdu are lower than those in Chongqing. The favorable meteorological conditions for high O3 in Chengdu include temperature ranging from 32 ℃-38 ℃, relative humidity ranging 30%-60%, and wind speed ranging from 0.5-3 m/s, while in Chongqing: temperature ranging from 36 ℃-40 ℃, relative humidity ranging from 30%-50%, and wind speed ranging form 0.6-2.8 m/s.(4)Loess regression was applied to fit hourly data for temperature and O3 in both Chengdu and Chongqing.The O3 inhibition events occurred when the air temperature in Chengdu and Chongqing exceeded 37.3 ℃ and 38.4 ℃, respectively.
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备注/Memo
收稿日期:2024-08-16
基金项目:国家重点研发计划课题资助项目(2023YFC3709301); 国家自然科学基金资助项目(42175174)
通信作者:张小玲.E-mail:xlzhang@ium.cn