Global Representation of Aerosol Vertical Structure and PM2.5 Concentrations from Satellite

Tuesday, 16 December 2014: 4:30 PM
Aaron van Donkelaar, Randall Martin and Brian Boys, Dalhousie University, Halifax, NS, Canada
Aerosol vertical profiles from chemical transport models (CTMs) allow satellite retrievals of aerosol optical depth (AOD) to be globally related to near-surface fine particulate matter (PM2.5) concentrations. The CALIOP space-borne lidar provides global retrieval of extinction profiles that offer valuable insight into the accuracy of the CTM aerosol profiles, and can improve our understanding of a major source of uncertainty in satellite-derived PM2.5. Attention is also needed to the complete evolution of aerosol properties affecting the AOD to PM2.5 relationship. Satellite-derived PM2.5 estimates produced by this method now span more than a decade and provide unprecedented insight into the spatial and temporal distribution of PM2.5 and its health impact.