| 武汉市2018年4—9月臭氧及其前体物非线性关系研究 |
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| 引用本文： | 陈安雄,胡柯,沈龙娇,钟章雄,段佳鹏,汪羽商,陈文泰.武汉市2018年4—9月臭氧及其前体物非线性关系研究[J].南京气象学院学报,2020,12(6):729-738. |
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| 作者姓名： | 陈安雄 胡柯 沈龙娇 钟章雄 段佳鹏 汪羽商 陈文泰 |
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| 作者单位： | 武汉市环境监测中心, 武汉, 430022,武汉市环境监测中心, 武汉, 430022,武汉市环境监测中心, 武汉, 430022,武汉市环境监测中心, 武汉, 430022,武汉市环境监测中心, 武汉, 430022,南京科略环境科技有限责任公司, 南京, 211800,南京科略环境科技有限责任公司, 南京, 211800 |
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| 基金项目： | 国家重点研发计划（2017YFC0212600） |
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| 摘 要： | 近年来武汉市臭氧污染日益严峻，成为影响空气质量达标的瓶颈，弄清臭氧及其前体物非线性关系是臭氧防控的关键和基础.本研究基于武汉中心城区2018年4—9月臭氧及其前体物在线观测数据，分析出武汉市臭氧浓度受前体物和气象条件等因素的共同影响，呈较为明显的季节变化和日变化特征.观测期间武汉市大气挥发性有机物（VOCs）平均体积分数为32.5×10-9，烷烃是武汉市VOCs的主要组分，其次是含氧VOCs （OVOCs）和卤代烃.利用基于观测的模型定量分析臭氧与前体物之间的关系，发现削减VOCs会引起臭氧生成潜势的显著下降，而削减氮氧化物则会使臭氧生成潜势升高，说明武汉市臭氧生成处于VOCs控制区.在人为源VOCs中，间/对二甲苯和邻二甲苯的相对增量反应活性（RIR）最高，是影响臭氧生成的关键组分.
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| 关 键 词： | 臭氧 基于观测的模型(OBM) 臭氧生成潜势 相对增量反应活性(RIR) |
| 收稿时间： | 2020/9/2 0:00:00 |
Nonlinear relationship between ozone and its precursors in Wuhan during 2018 |
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| CHEN Anxiong,HU Ke,SHEN Longjiao,ZHONG Zhangxiong,DUAN Jiapeng,WANG Yushang and CHEN Wentai.Nonlinear relationship between ozone and its precursors in Wuhan during 2018[J].Journal of Nanjing Institute of Meteorology,2020,12(6):729-738. |
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| Authors: | CHEN Anxiong HU Ke SHEN Longjiao ZHONG Zhangxiong DUAN Jiapeng WANG Yushang and CHEN Wentai |
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| Institution: | Wuhan Municipal Environmental Monitoring Center, Wuhan 430022,Wuhan Municipal Environmental Monitoring Center, Wuhan 430022,Wuhan Municipal Environmental Monitoring Center, Wuhan 430022,Wuhan Municipal Environmental Monitoring Center, Wuhan 430022,Wuhan Municipal Environmental Monitoring Center, Wuhan 430022,Nanjing Intelligent Environmental Sci-Tech Company Limited, Nanjing 211800 and Nanjing Intelligent Environmental Sci-Tech Company Limited, Nanjing 211800 |
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| Abstract: | In recent years,ozone (O3) pollution has become increasingly severe,which has proved to be the bottleneck of air quality control in Wuhan.Clarifying the nonlinear relationship between ozone and its precursors is the basis for ozone pollution control.To address this,an observation-based model was used to calculate relative incremental reactivity (RIR) and ozone formation potential based on online observation data of O3 and its precursors collected by Wuhan city station during April to September 2018.The results showed that O3 possessed obvious temporal variation on both seasonal and diurnal scales,and was subject to O3 precursors as well as meteorological conditions.The average volume fraction of volatile organic compounds (VOCs) was 32.5×10-9 during the observation period.Alkanes were the dominant VOCs in Wuhan,followed by oxygenated VOCs (OVOCs) and halogenated hydrocarbons.The reductions of VOCs and NOx would respectively result in a significant drop and an increase of ozone formation potential.It indicated that Wuhan was under the VOCs-limited regime during the observation period.Among the anthropogenic VOCs,m/p-xylene and o-xylene had the highest RIR,thus were the major components affecting the formation of ambient ozone in Wuhan. |
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| Keywords: | ozone observation-based model (OBM) ozone formation potential relative incremental reactivity(RIR) |
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