The Ozone Mapping and Profiler Suite (OMPS) Limb Profiler (LP) Version 1 aerosol extinction retrieval algorithm: theoretical basis
The theoretical basis of the Ozone Mapping and Profiler Suite (OMPS) Limb Profiler (LP) Version 1 aerosol extinction retrieval algorithm is presented. The algorithm uses an assumed bimodal lognormal aerosol size distribution to retrieve aerosol extinction profiles at 675 nm from OMPS LP radiance...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-05-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/11/2633/2018/amt-11-2633-2018.pdf |
| Summary: | The theoretical basis of the Ozone Mapping and Profiler Suite (OMPS) Limb
Profiler (LP) Version 1 aerosol extinction retrieval algorithm is presented.
The algorithm uses an assumed bimodal lognormal aerosol size distribution
to retrieve aerosol extinction profiles at 675 nm from OMPS LP radiance
measurements. A first-guess aerosol extinction profile is updated by
iteration using the Chahine nonlinear relaxation method, based on
comparisons between the measured radiance profile at 675 nm and the radiance
profile calculated by the Gauss–Seidel limb-scattering (GSLS) radiative
transfer model for a spherical-shell atmosphere. This algorithm is discussed
in the context of previous limb-scattering aerosol extinction retrieval
algorithms, and the most significant error sources are enumerated. The
retrieval algorithm is limited primarily by uncertainty about the aerosol
phase function. Horizontal variations in aerosol extinction, which violate
the spherical-shell atmosphere assumed in the version 1 algorithm, may also
limit the quality of the retrieved aerosol extinction profiles significantly. |
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| ISSN: | 1867-1381 1867-8548 |