Direct Measurements of Tropospheric Ozone from TOMS Radiances

摘要

Measurements of the global tropospheric ozone fields are of great importance for a full understanding of the chemical and dynamical processes that control the distribution and amount of trace gases in the troposphere and stratosphere. In previous work we have shown that tropospheric ozone amounts can be retrieved directly from the radiance data obtained by TOMS (Total Ozone Mapping Spectrometer), and that the use of TOMS archived ozone amounts can lead to large errors. This new algorithm was applied to the Biomass Burning regions of Africa, and daily maps of the tropospheric ozone were obtained. The specific objectives of this investigation are (1) to develop the equatorial algorithm further and to extend the analysis to cover the entire African continent, (2) to apply the algorithm to the study of the climatology of the biomass burning seasons, (3) to develop a new technique for the derivation of a climatological tropospheric ozone data base using cloud to ground radiance differences, and (4) to study the global trends of the zonally averaged tropospheric ozone from 1988 to 1993.