Ozone pollution in Hangzhou and the impact of typhoon fireworks process
The present paper utilizes the air quality and meteorological data Hangzhou city(China)from 2018 to 2021 to investigate the ozone pollution problem and other covariance factors.We selected the backward trajectory and ozone hourly data during the typhoon"fireworks"to examine the impact of firework emissions on air quality and climate change in Hangzhou for the year 2021.Hence the study was conducted to perform the backward trajectory clustering and potential source area analysis.The results showed that the air quality in Hangzhou improved well from 2018 to 2021,and the ozone pollution has been more serious,mainly in April-October months in each year.It was depicted that the Ozone concentration was negatively correlated with relative humidity and positively correlated with temperature,while wind speed also impacts on ozone production and leads to dispersion of Ozone pollution during strong winds.For example,during the typhoon"fireworks"in 2021,the high rainfall and strong wind speed decreased the concentration of various pollutants.After the typhoon passed through,the high temperature and low humidity contributed to the increase of ozone concentration.The clustering and potential source analysis was conducted for July 25～30,2021(after the typhoon transit),with seven air mass transport pathways.The results revealed that the trajectory of air masses originated from the northwest direction through Jiangxi and Hubei Provinces.While the consistency of the high values of WPSCF and WCWT was depicts that the ozone pollution was influenced by regional transport from the cities located in different provinces of Zhejiang,Jiangxi and Hubei.
air qualityozonebackward trajectorysource analysisHangzhoufactor
万方数据
维普
