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 ›› 2022, Vol. 38 ›› Issue (1): 15-22.doi: 10.3969/j.issn.1673-503X.2022.01.003

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Variation characteristics of air pollutants in Sichuan region during January-March of 2020

Wei-jie LI1(),Hu-jia ZHAO2,Quan-liang CHEN1,*(),Lin-chang AN3,Jie ZHANG1,Xu-xin WANG4   

  1. 1. School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China
    2. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110166, China
    3. National Meteorological Center, Beijing 100081, China
    4. Anshan Meteorological Service, Anshan 114004, China
  • Received:2021-08-18 Online:2022-02-28 Published:2022-03-02
  • Contact: Quan-liang CHEN E-mail:1349270937@qq.com;chenql@cuit.edu.cn

Abstract:

Based on the monitoring data published by the China Environmental Monitoring Station and ground observation data of the China Meteorological Administration during 2018-2020, the variation characteristics of air pollutants in Sichuan province from January to March of 2020 were analyzed using the correlation analysis method.The results show that due to the implementation of anthropogenic emission source control policies from January to March of 2020, the concentrations of NO2 and PM10 in Chengdu, Mianyang, Yibin, and Panzhihua decrease by 30% on average compared with the same period of 2018-2019.However, the daily mean of O3 mass concentration in the four cities increases by 15.21%, 10.32%, 5.03%, and 0.42%, respectively.At the same time, the correlation analysis of O3 with relative humidity, temperature, wind speed, and precipitation shows that O3 is negatively correlated with relative humidity, and positively correlated with temperature, wind speed, and precipitation, with the correlation coefficients exceeding 0.7.The abnormal growth of O3 is not only affected by meteorological elements but also indirectly maintained by low nitrogen oxide and PM10 concentrations.Strict pollutant emission control measures have a great impact on the emission of major pollutants, but less impact on secondary pollutants such as ozone.The prevention and control of secondary pollutant pollution are still facing severe challenges.

Key words: Ozone, Nitrogen dioxide, PM10

CLC Number: