| 基于总过氧自由基观测研究合肥市西郊夏季O3生成特征 |
| |
| 引用本文： | 俞辉,韦娜娜,徐学哲,刘芊芊,姚易辰,赵卫雄,张为俊.基于总过氧自由基观测研究合肥市西郊夏季O3生成特征[J].环境科学,2023,44(4):1974-1984. |
| |
| 作者姓名： | 俞辉 韦娜娜 徐学哲 刘芊芊 姚易辰 赵卫雄 张为俊 |
| |
| 作者单位： | 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 合肥 230031;中国科学技术大学研究生院科学岛分院, 合肥 230026;中国科学技术大学研究生院科学岛分院, 合肥 230026;中国科学技术大学环境科学与光电技术学院, 合肥 230026;中国科学院合肥物质科学研究院安徽光学精密机械研究所, 合肥 230031;中国科学技术大学环境科学与光电技术学院, 合肥 230026 |
| |
| 基金项目： | 国家自然科学基金项目（U21A2028，42022051，41905118，21876177）；中国科学院青年创新促进会项目（Y202089）；合肥研究院院长基金项目（YZJJ202101，BJPY2019B02）；大气重污染成因与治理攻关项目（DQGG202117） |
| |
| 摘 要： | 2020年8月利用化学放大法对合肥市西郊大气总过氧自由基RO*2·(RO2·+HO2·)体积分数进行监测，并结合O3和其前体物，分析了过氧自由基体积分数、O3生成速率和O3生成对前体物的敏感性.结果表明，观测期间总过氧自由基体积分数的日均值呈典型的单峰型变化，12:00左右出现最高值，日间峰值体积分数为43.8×10-12,日间RO*2·与太阳辐射强度、温度和O3呈明显的相关性.利用实测RO*2·和NO,获得合肥市西郊夏季O3生成速率，日间峰值为10.6×10-9h-1,O3生成速率对NO变化更为敏感.基于大气自由基和NOx(NO+NO2)反应去除速率占比(Ln/Q),对合肥...
|
| 关 键 词： | 臭氧(O3) 总过氧自由基(RO*2·) 臭氧生成速率 臭氧生成敏感性 合肥市西郊夏季 |
| 收稿时间： | 2022/6/10 0:00:00 |
| 修稿时间： | 2022/7/16 0:00:00 |
Characteristics of O3 Production in the Western Suburb of Hefei in Summer Based on the Observation of Total Peroxy Radical |
| |
| YU Hui,WEI Na-n,XU Xue-zhe,LIU Qian-qian,YAO Yi-chen,ZHAO Wei-xiong,ZHANG Wei-jun.Characteristics of O3 Production in the Western Suburb of Hefei in Summer Based on the Observation of Total Peroxy Radical[J].Chinese Journal of Environmental Science,2023,44(4):1974-1984. |
| |
| Authors: | YU Hui WEI Na-n XU Xue-zhe LIU Qian-qian YAO Yi-chen ZHAO Wei-xiong ZHANG Wei-jun |
| |
| Institution: | Anhui Institute of Optics and Fine Mechanics, Heifei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;Science Island Branch, Graduate School, University of Science and Technology of China, Hefei 230026, China;Science Island Branch, Graduate School, University of Science and Technology of China, Hefei 230026, China;School of Environmental Science and Optoelectronics Technology, University of Science and Technology of China, Hefei 230026, China; Anhui Institute of Optics and Fine Mechanics, Heifei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;School of Environmental Science and Optoelectronics Technology, University of Science and Technology of China, Hefei 230026, China |
| |
| Abstract: | In August 2020, the observations of total peroxy radical concentrations were carried out in the western suburb site of Hefei using a peroxy radical chemical amplifier (PERCA) instrument. The ozone production and its sensitivity were characterized with the measured O3 and its precursors. The results showed that the daily variation in total peroxy radical concentrations exhibited an obvious convex tend, with the highest value at approximately 12:00; the average peak peroxy radical concentration was 43.8×10-12; and the concentrations of the peroxy radical and ozone were driven by strong solar radiation and high temperature. The photochemical ozone production rate could be determined with peroxy radical and NO concentration. The average ozone peak production rate in summer was 10.6×10-9 h-1, which was more sensitive to NO concentration. Based on the ratio of the radical loss rate due to reactions with NOx to the radical loss rate (Ln/Q), the characteristics of O3 production in the western suburb of Hefei in summer were analyzed. The results showed that O3 production sensitivity varied greatly during the day. The summer O3 production regime shifted from the VOC-sensitive chemistry in the early morning to NOx-sensitive chemistry in the afternoon, and this regime transition typically occurred in the morning. |
| |
| Keywords: | ozone(O3) total peroxy radical(RO2*· ) ozone production rate sensitivity of ozone generation summer in the western suburb of Hefei |
|
| 点击此处可从《环境科学》浏览原始摘要信息 |
| 点击此处可从《环境科学》下载免费的PDF全文 |
|
