Retrieval of tropospheric CO profiles using correlation radiometer. II: Effects of other gases and the retrieval in cloudy atmosphere

The effects of methane, ozone, water vapor and nitrous oxide on the retriev al of tropospheric CO profiles using correlation radiometer have been asses sed. The scheme of the retrieval in the presence of solid clouds have been proposed. The effect of methane and nitrous oxide can be well accounted by their mean profile, and that of ozone can be represented by a typical middl e latitude ozone profile, while for water vapor, less than 50% uncertainty is required. With the assumption of blackbody for cloud surface, the CO pro file may be retrieved for low and middle solid clouds. However, the retriev al of CO profile will lose quality for high clouds.