主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2020, Vol. 36 ›› Issue (4): 36-44.doi: 10.3969/j.issn.1673-503X.2020.04.005

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Statistical analysis of air pollution in Fenwei Plain based on satellite remote sensing and ground observation data

Xing-xing GAO1,2(),Hai-lin GUI3,*(),Liu-jie PAN1,Nan WANG1,Jian-peng WANG1   

  1. 1. Shaanxi Meteorological Observatory, Xi'an 710014, China
    2. Key Laboratory of Atmospheric Chemistry, China Meteorological Administration, Beijing 100081, China
    3. National Meteorological Centre, Beijing 100081, China
  • Received:2019-06-11 Online:2020-08-30 Published:2020-06-16
  • Contact: Hai-lin GUI E-mail:1276015279@qq.com;guihl@cma.gov.cn

Abstract:

Based on remote sensing data from the MODIS satellite, the Ozone Monitoring Instrument (OMI) and the CALIPSO Lidar, the hourly surface concentrations of six criteria air pollutants observed at national environmental monitoring stations, and the surface meteorological data such as visibility and haze records, we comprehensively analyzed air quality and aerosol composition over Fenwei Plain during autumn and winter of 2013-2018 and investigated the relationship between the satellite-retrieved aerosol optical depth (AOD) and surface pollutant concentrations.In addition, meteorological conditions and the effects of emission reduction were assessed using the chemical weather forecasting system-EMI evaluation model (CUACE-EMI) developed by the China Meteorological Administration.The results show that six among the eleven representative cities suffer from air pollution for nearly or more than half of the whole autumn and winter.When air pollution occurs, the pollution level mostly reaches moderation and above at these representative cities.Haze and heavy haze occur frequently in Sanmenxia, Linfen, Yuncheng, and Xi'an, with the occurrence frequency of severe haze of 11.63%-14.78%.The primary pollutants are PM2.5 and PM10 and dominantly consist of polluted dust, desert dust, and smoke dominate, with the occurrence frequency of 36.24%, 25.14%, and 22.96%, respectively.The correlation coefficients between MODIS-retrieved AOD and air quality index (AQI), PM2.5, and PM10 concentrations are 0.72, 0.70, and 0.64, respectively.Compared with each year from 2013 to 2017, meteorological conditions contributes with an increase of PM2.5 concentration in 2018 by 17.06%, 1.58%, 4.34%, 11.25%, and 5.75%, respectively, emission reduction measures results in a decrease of PM2.5 concentration in 2018 by 8.74%, 28.01%, 4.93%, 3.16%, and 42.62%, respectively.

Key words: Fenwei Plain, Air quality index, Haze, Satellite remote sensing

CLC Number: