Study on the vertical distribution and potential sources of O3 in Guangzhou during summer based on hyperspectral remote sensing technology
Guangzhou,one of the central cities in the Pearl River Delta urban agglomeration,is increasingly facing ozone pollution,which has become an important factor influencing air quality improvement in the region.This highlights the urgent need for research into the sources of this pollution.This study analyzes the vertical distribution characteristics of ozone in Guangzhou during the summer months,based on data collected from the hyperspectral remote sensing monitoring station in Panyu University Town from June to August 2023,and examines the potential sources of ozone pollution.The results indicate that:1)There is a strong correlation between the hyperspectral remote sensing data and the near-surface monitoring data from national control stations,confirming the accuracy and reliability of the remote sensing results;2)The highest daily ozone levels in Guangzhou during the summer typically occur in the boundary layer at 15∶00-16∶00 pm,with average concentrations in June and July found to be higher than those in August;3)The ozone concentrations in Guangzhou are significantly influenced by external sources.Near-surface ozone primarily originates from eastern Guangdong Province,while mid-boundary layer ozone mainly comes from the eastern direction of Guangzhou.High-altitude ozone is predominantly sourced from the northeast,with additional contributions to ozone transport from the southwest.
Hyperspectral remote sensingGuangzhousummerozone pollutionbackward trajectorypotential source area
万方数据
