台风“南玛都”影响下的福州市臭氧污染成因及控制对策  

Causes and Control Measures of Ozone Pollution in Fuzhou City under the Influence of Typhoon‘Nanmadu’

作　　者：应传友 林晶 郑文飞 蔡哲 陈曦 唐志伟 周德荣[3] 江飞[4] YING Chuanyou;LIN Jing;ZHENG Wenfei;CAI Zhe;CHEN Xi;TANG Zhiwei;ZHOU Derong;JIANG Fei(Fuzhou Institute of Environmental Science,Fuzhou 350013,China;Nanjing Climblue Technology Co.,Ltd.,Nanjing 211135,China;School of Atmospheric Sciences,Nanjing University,Nanjing 210046,China;Institute for Earth Systems Science,Nanjing University,Nanjing 210046,China)

机构地区：[1]福州市环境科学研究院,福建福州350013 [2]南京创蓝科技有限公司,江苏南京210035 [3]南京大学大气科学学院,江苏南京210046 [4]南京大学地球系统科学研究所,江苏南京210046

出　　处：《环境科学研究》2023年第12期2293-2305,共13页Research of Environmental Sciences

基　　金：国家重点研发计划重点专项(No.2020YFA0607504);福建省自然科学基金项目(No.2022J01518)。

摘　　要：2022年9月18-20日福州市发生了一次臭氧(O_(3))污染事件,11:00-14:00 O_(3)浓度基本维持在160μg/m^(3)以上,且19日O_(3)日最大8小时平均浓度达176μg/m^(3).这次污染事件可能与第14号台风“南玛都”的外围东北气流带来的海上O_(3)污染传输有关.本文利用2022年9月15-21日常规大气污染物浓度、VOCs组分浓度及气象监测数据,结合拉格朗日粒子扩散模型(LPDM模型)、区域空气质量模型(WRF-CMAQ模型)和基于观测的化学盒子模型(OBM模型)等多种手段对此次污染过程进行了分析,定量评估了海上O_(3)传输贡献和福州市O_(3)前体物减排效果.结果表明:(1)基于△O_(x)(光化学氧化剂小时浓度变化量)的结果显示,19日受东北风影响,近海高浓度O_(3)气团传输至福州内陆,传输贡献为5~17μg/m^(3),19日18:00-23:00海上O_(3)污染气团对九龙站点的O_(3)平均输送量达到6.0μg/(m^(3)·h).(2)9月18-20日,福州市O_(3)生成由VOCs与NO_(x)协同控制区逐渐转为VOCs控制区,福州市VOCs与NO_(x)减排比例在台风影响前期控制在1∶1,后期需增大VOCs减排量,减排比例调整为2∶1,以缓减污染天高温及自然源排放增加等不可控因素对O_(3)污染贡献增加的影响.研究显示,通过对NO_(x)与VOCs排放管控进行科学动态调整,能够获得更好的管控效果.From September 18th-20th,2022,an ozone(O_(3))pollution episode occurred in Fuzhou.The O_(3) concentration from 11:00 to 14:00 remained above 160μg/m³.On September 19th,2022,the daily maximum 8-hour average O_(3) concentration reached 176μg/m^(3).This episode may be related to the offshore O_(3) transport caused by the northeastern airflow in the periphery of Typhoon‘Nanmadol’No.14.Here,based on the concentrations of conventional atmospheric pollutants and VOCs components and meteorological data from September 15th to 21st,2022,combined with the Lagrange particle diffusion model(LPDM),regional air quality model(WRF-CMAQ),and observation-based chemical box model(OBM),we analyzed the process of this O_(3) pollution episode,quantitatively assessed the contribution of maritime O_(3) transport and the effect of emission reduction of O_(3) precursors on O_(3) pollution,which can provide support for the prevention and control of O_(3) pollution in Fuzhou under the influence of typhoon systems.The main conclusions are as follows:(1)Based on theΔO_(x)(hourly concentration change of photochemistry oxidant)results,under the influence of the northeast wind,the air mass with high O_(3) concentrations from the offshore was transmitted to the inland of Fuzhou on 19th.The contribution of O_(3) transmission was about 5-17μg/m^(3).From 18:00 to 23:00 on the 19th,the hourly transportation contribution to the Jiulong site reached 6.0μg/(m^(3)·h).(2)From September 18th to 20th,ozone generation in Fuzhou City gradually shifted from the VOCs and NO_(x) synergistic control area to the VOCs control area.The emission reductions of VOCs and NO_(x) in Fuzhou should be controlled at a ratio of 1∶1 in the early stage of typhoon influence.In the later stage,the emission reduction of VOCs should be increased,and the ratio should be adjusted to 2∶1 to mitigate the impact of uncontrollable factors such as high temperatures and the increased biogenic VOCs emissions on the O_(3) pollution in pollution days.The study found that better

关 键 词：台风 O_(3)污染 WRF-CMAQ模型 LPDM模型 福州市 

分 类 号：X511[环境科学与工程—环境工程]