Multi-Platform VOC Observations in Hong Kong and the Greater Bay Area: Bridging Ground, UAV, and Satellite Data

Volatile organic compounds (VOCs) are critical precursors to tropospheric ozone and secondary organic aerosol formation in Hong Kong and the Greater Bay Area. This study presents an integrated characterization of VOCs across complementary observation platforms: ground-based networks, unmanned aerial vehicles (UAVs), and satellite remote sensing.

Ground-based measurements at multiple archetypical sites reveal distinct VOC pollution profiles, which identifies persistent anthropogenic sources and seasonal photochemical formation patterns. UAV deployments extend spatial coverage and enable vertical profiling of VOC distributions, capturing intra-urban variability. Satellite retrievals provide diurnal atmospheric composition data, advancing detection of weakly absorbing reactive trace gases.

Integrated risk assessment frameworks quantify environmental and health implications of VOC pollution across different urban archetypes. This multi-platform approach demonstrates the feasibility of combining disparate observation systems to advance VOC characterization, source apportionment, and air quality management in rapidly developing coastal regions.