Abstract
At the beginning of 2020, COVID-19 broke out. Because the virus is extremely contagious and the mortality rate after infection is extremely high, China and many countries in the world have imposed lockdowns. Air pollutants during the epidemic period have attracted the attention of many scholars. This research is to use predictive models to describe changes in extreme air pollutants. China is the first country in the world to enter the lockdown state. This study uses data from 2015-2020 to compare and predict the concentration of extreme pollutants before and after the lockdown. The results show that the lockdown of the epidemic will reduce the annual average concentration of PM2.5, and the annual average concentration of O3 will increase first and then decrease. Through analysis, it is concluded that there is a synergistic decrease trend between PM2.5 and O3. With the various blockade measures for epidemic prevention and control, the reduction of extreme air pollutant concentrations is sustainable. The assessment of China’s air quality in conjunction with the COVID-19 can provide scientific guidance for the Chinese government and other relevant departments to formulate policies.
Highlights
At the end of 2019, Wuhan (China) reported a new coronavirus disease (COVID-19) for the first time
Air quality will return to a good state under long-term control
Based on the above prediction results, it can be known that the lockdown of the COVID-19 will have a continuous impact on China’s extreme air pollution
Summary
At the end of 2019, Wuhan (China) reported a new coronavirus disease (COVID-19) for the first time. The virus was found all over the world in a very short time. At the end of January 2020, the World Health Organization (WHO) declared a state of public health emergency, and the COVID-19 widespread concern in the international community (WHO 2020). China has put all efforts across the country to support Wuhan, the hardest-hit area of the epidemic. Work and production were suspended across the country for home isolation. With the continuous efforts of the Chinese people, the COVID-19 has been gradually suppressed
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