Influence of the aerosol vertical distribution on the retrievals of aerosol optical depth from satellite radiance measurements

Details Influence of the aerosol vertical distribution on the retrievals of aerosol optical depth from satellite radiance measurements Influence of the aerosol vertical distribution on the retrievals of aerosol optical depth from satellite radiance measurements

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3457q&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 21, p. 3457-3460

Other

12

Atmospheric Composition And Structure: Aerosols And Particles, Meteorology And Atmospheric Dynamics: Numerical Modeling And Data Assimilation, Meteorology And Atmospheric Dynamics: Radiative Processes, Meteorology And Atmospheric Dynamics: Remote Sensing

Scientific paper

We investigate the importance of the layered vertical distribution of absorbing and non-absorbing tropospheric aerosols for the retrieval of the aerosol optical depth from satellite radiances measured at visible wavelengths at a single viewing angle. We employ lidar and in-situ measurements of aerosol extinction coefficients and optical depths to model radiances which would have been observed by a satellite. Then, we determine the aerosol optical depth that would produce the observed radiance under various sets of assumptions which are often used in current retrieval algorithms. We demonstrate that, in the presence of dust or other absorbing aerosols, the retrieved aerosol optical depth can underestimate or overestimate the observed optical depth by a factor of two or more depending on the choice of an aerosol optical model and the relative position of different aerosol layers. The presence of undetected clouds provides a further complication.

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