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https://doi.org/10.5194/amt-2017-299
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
04 Oct 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).
The Ozone Mapping and Profiler Suite (OMPS) Limb Profiler (LP) Version 1 Aerosol Extinction Retrieval Algorithm: Theoretical Basis
Robert Loughman1, Pawan K. Bhartia2, Zhong Chen3, Philippe Xu4, Ernest Nyaku1, and Ghassan Taha5 1Department of Atmospheric and Planetary Sciences, Hampton University, Hampton, Virginia, USA
2Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
3Science Systems and Applications, Inc. (SSAI), 10210 Greenbelt Road, Suite 600, Lanham, Maryland 20706, USA
4Science Applications International Corporation (SAIC), Lanham, Maryland, USA
5GESTAR, Columbia, Maryland, USA
Abstract. The theoretical basis of the Ozone Mapping and Profiler Suite (OMPS) Limb Profiler (LP) Version 1 aerosol extinction (AE) retrieval algorithm is presented. The algorithm uses an assumed bi-modal log-normal aerosol size distribution to retrieve AE profiles at 675 nm from OMPS LP radiance measurements. A first-guess AE profile is updated by iteration using the Chahine non-linear 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 AE retrieval algorithms, and the most significant error sources are enumerated. The retrieval algorithm is limited primarily by uncertainty about the aerosol phase function, and by horizontal variations in aerosol extinction, which violate the spherical-shell atmosphere assumed in the Version 1 algorithm.

Citation: Loughman, R., Bhartia, P. K., Chen, Z., Xu, P., Nyaku, E., and Taha, G.: The Ozone Mapping and Profiler Suite (OMPS) Limb Profiler (LP) Version 1 Aerosol Extinction Retrieval Algorithm: Theoretical Basis, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-299, in review, 2017.
Robert Loughman et al.
Robert Loughman et al.
Robert Loughman et al.

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Short summary
The theoretical basis of the Ozone Mapping and Profiler Suite (OMPS) Limb Profiler (LP) Version 1 aerosol extinction (AE) retrieval algorithm is presented. This algorithm is discussed in the context of previous limb-scattering AE retrieval algorithms, and the most significant error sources are enumerated: Uncertainty about the aerosol phase function and horizontal variations in aerosol extinction, which violate the spherical-shell atmosphere assumed in the Version 1 algorithm.
The theoretical basis of the Ozone Mapping and Profiler Suite (OMPS) Limb Profiler (LP) Version...
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