FY-4A SATELLITE BASED CLOUD MICROPHYSICAL VARIATION ANALYSIS OF AIRBORNE CLOUD SEEDING OPERATIONS IN SICHUAN BASIN

Using near surface atmospheric pollutant reanalysis and remote sensing measurements, a dipole-like spatial pattern of near surface ozone trap across two megacities of the Sichuan Basin is demonstrated during 2013–2019. Unexpectedly, Chongqing has the deeper ozone trap compared to Chengdu despite its lower urbanization level. Results showed the ozone trap pattern aligns more closely with meteorological condition rather than chemical condition.