Characteristics of Ozone Pollution and Formation Sensitivity Based on Satellite Observation in Qingdao City
The variation characteristics,tropospheric column concentration distribution and formation sensitivity of ozone pollution process during the period of 17-22 May,2022 in Qingdao City were studied based on the observations of Sentinel-5P satellite and laser lidar.As a result,the study indicated that this process was affected by the adverse pollution diffusion con-ditions such as regional warming,enhanced solar radiation,and thermal inversion,as well as the transmission of regional pol-lution and high-altitude sedimentation.There existed significant spatial distribution differences in terms of the column concen-trations of ozone and its precursors HCHO and NO2 in the troposphere.Furthermore,the ozone formation sensitivity analysis presented that most parts of the urban and suburban areas were synergistically controlled by VOCs and NOx,and it is neces-sary to optimize the emission reduction ratio and to achieve collaborative control.The outer suburbs were governed by NOx in general,while the petrochemical industrial area was mainly located in VOCs-controlled area.
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