Case Analysis of Near-Surface Ozone Pollution Events Based on the WRF-CAMx Model
Lin Qiuhan
Jiang Rongfu
Lin Nan
Wu Lijuan
Liang Baoyuan
Abstract：Using the hourly meteorological data from the Putian meteorological station and hourly O3 data from the environmental monitoring station in November 8-9,2020,as well as the wind profiler radar data and emission source data,this article analyzes the meteorological characteristics of the nighttime O3 pollution process.Additionally,the WRF-CAMx model is employed for vertical distribution simulation and source analysis of O3.The results indicate that the nighttime peak concentration of O3 in Putian City was 212 µg·m-3,significantly higher than that in Fuzhou and Quanzhou.Prior to the O3 pollution epi-sode,the air temperature was on the rise,which was likely caused by the warming effect ahead of the southward-moving cold front.During the O3 pollution at night,the wind profiler radar data showed a 27.2％decline in wind speed from the near-surface to the 750 m height in Putian City,exacerbating the O3 pollution.The Hysplit 4 model results reveal that during the nighttime O3 pollution period,the airflow passed through the region with significant NOX and VOCS emissions,while during non-pollution periods,the airflow mainly originated from the East China Sea.WRF-CAMx model results demonstrate that during the heavy nighttime O3 pollution period(23:00),the atmospheric O3 concentration could reach the 1500 m height at 850 hPa.Ningde City contributed 94％to the nighttime O3 pollution in Futian City among va-rious cities in Fujian Province.
Keywords：O3 pollutionmeteorological conditionregional transportwind-profiler radarWRF-CAMx
Publication Date：2024-06-28
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 104-111 )