WE PROPOSE TO CARRY OUT GEOS-CHEM MODEL CALCULATIONS AT THE HIGHEST AVAILABLE RESOLUTION OVER INDIA CHINA AND THE USA TO OBTAIN AEROSOLS OPTICAL DEPTH AND THEIR PROPERTIES. WE WILL COMPARE THESE RESULTS WITH THE MISR DATA AT 4 KM X 4 KM RESOLUTION (THE HIGHEST AVAILABLE RESOLUTION) AND OTHER SATELLITE OBSERVATIONS AND PROVIDE MUCH NEEDED HIGH RESOLUTION AEROSOL/PARTICULATE MATTER ABUNDANCES. THE WORK WILL ENABLE THE USE OF HIGH RESOLUTION MISR SATELLITE DATA FOR AIR QUALITY AND CLIMATE CHANGE ASSESSMENT.