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投稿时间：2022-08-27 修订日期：2023-04-10
投稿时间：2022-08-27 修订日期：2023-04-10
中文摘要: PM2.5和O3已经成为汾渭平原城市最主要的污染物，两者之间相互影响，在暖季经常同时出现构成污染，其污染程度与气象条件密切相关。本文利用2015年至2021年间汾渭平原12个城市逐日PM2.5和O3浓度、地面气象观测数据以及ERA5高空再分析数据等资料，分析了汾渭平原PM2.5和O3的时空变化特征以及复合污染发生时PM2.5和O3的关系，并研究了局地气象条件和天气形势对复合污染的影响。结果显示，得益于“污染协同治理”和“一市一策”的实施，该地区年均PM2.5和MDA8 O3（MDA8-90，O3年评价值，日最大8小时滑动平均值第90百分位数）浓度分别在2017年和2018年开始持续下降，复合污染日数也在2019年后开始持续下降；分别分析了PM2.5（MDA8 O3）偏高时对MDA8 O3（PM2.5）的影响，PM2.5增加可削弱太阳辐射，从而影响O3生成使得两者呈负相关，O3同样会增强大气氧化性，促进二次颗粒物生成导致PM2.5浓度增大使二者呈现正相关；复合污染主要发生在3-9月，在汾渭平原东部城市出现次数较多，多出现在高温、低湿的环境下；最后利用T-PCA算法（正交主成分分析）将复合污染的天气环流形势分为4种类型，主要呈现出以高空西北气流或偏西气流、低层为暖区偏南风或微风为主的天气特征。研究结果对汾渭平原的大气污染防治提供了观测依据，尤其对于PM2.5和O3污染协同治理具有重要意义。
Abstract:PM2.5 and O3 which interact with each other have become the most important pollutants in the cities of FenWei Plain. The pollution often occurs simultaneously in the warm season and is closely related to meteorological conditions. Based on the daily PM2.5 and O3 concentration data, ground meteorological observation data and ERA5 high-altitude re-analysis data of 12 cities in the FenWei Plain from 2015 to 2021, the spatio-temporal characteristics of PM2.5 and O3 in the FenWei Plain, as well as the relationship between PM2.5 and O3 when combined pollution occurs were analyzed, and the impact of local meteorological conditions and synoptic situation on combined pollution is also studied in this paper. The result shows that the average annual PM2.5 and MDA8 O3 (maximum daily 8-h average ozone) concentrations in the FenWei Plain began to decline continuously in 2017 and 2018, respectively, and the number of compound pollution days also began to decline continuously after 2019, due to the implementation of "collaborative pollution control" and "one city, one policy"; The effects of PM2.5 (MDA8 O3) on MDA8 O3 (PM2.5) were analyzed; the increase of PM2.5 can weaken solar radiation which affects O3 generation so that the two are negatively correlated, while O3 will also oxidize secondary particulate matter generation and lead to an increase in PM2.5 concentration, showing a positive correlation between PM2.5 and O3; combined pollution mainly occurs in March-September, frequently in the eastern cities of the FenWei Plain , and mostly in condition of high temperature and low humidity; Finally, the synoptic circulation situation of combined pollution is divided into four types by principal component analysis in the T-mode (T-PCA algorithm), featured by northwest or the westerly air flow in high-altitude and the warm zone southerly wind or breeze in low layer. The results of the study provide the observation basis for controlling pollution in the FenWei Plain and are of great significance for cooperative governance for PM2.5 and O3 pollution especially.
文章编号：202208270244 中图分类号： 文献标志码：
基金项目:*山西省气象局面上项目（SXKMSTQ20217137），秦岭和黄土高原生态环境气象重点实验室开放研究基金重点课题（2021K-10）资助
| 作者 | 单位 | 地址 |
| 周涛 | 山西省运城市气象局 | 山西省运城市盐湖区河东东街268号 运城市气象局 |
| 周青 | 中国气象局气象探测中心 | 北京市海淀区中关村南大街46号 |
| 张勇 | 中国气象局气象发展与规划院 | |
| 吴昱树 | 乌兰察布市气象局 | |
| 孙健 | 莒县气象局 |
| Author Name | Affiliation | Address |
| ZHOUTAO | Yuncheng Meteorological Bureau | 山西省运城市盐湖区河东东街268号 运城市气象局 |
| ZHOUQING | 北京市海淀区中关村南大街46号 | |
| ZHANGYONG | ||
| WUYUSHU | ||
| SUNJIAN |
引用文本：
ZHOUTAO,ZHOUQING,ZHANGYONG,WUYUSHU,SUNJIAN,0.Study on Characteristics of PM2.5-O3 combined pollution and meteorological impact in Fenwei Plain[J].Meteor Mon,():-.
ZHOUTAO,ZHOUQING,ZHANGYONG,WUYUSHU,SUNJIAN,0.Study on Characteristics of PM2.5-O3 combined pollution and meteorological impact in Fenwei Plain[J].Meteor Mon,():-.
ZHOUTAO,ZHOUQING,ZHANGYONG,WUYUSHU,SUNJIAN,0.Study on Characteristics of PM2.5-O3 combined pollution and meteorological impact in Fenwei Plain[J].Meteor Mon,():-.
ZHOUTAO,ZHOUQING,ZHANGYONG,WUYUSHU,SUNJIAN,0.Study on Characteristics of PM2.5-O3 combined pollution and meteorological impact in Fenwei Plain[J].Meteor Mon,():-.