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| Titel |
Gauss–Seidel limb scattering (GSLS) radiative transfer model development in support of the Ozone Mapping and Profiler Suite (OMPS) limb profiler mission |
| VerfasserIn |
R. Loughman, D. Flittner, E. Nyaku, P. K. Bhartia |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 6 ; Nr. 15, no. 6 (2015-03-17), S.3007-3020 |
| Datensatznummer |
250119555
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| Publikation (Nr.) |
 copernicus.org/acp-15-3007-2015.pdf |
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| Zusammenfassung |
The Gauss–Seidel limb scattering (GSLS) radiative transfer (RT) model
simulates the transfer of solar radiation through the atmosphere and is
imbedded in the retrieval algorithm used to process data from the Ozone
Mapping and Profiler Suite (OMPS) limb profiler (LP), which was launched on
the Suomi NPP satellite in October 2011. A previous version of this model has
been compared with several other limb scattering RT models in previous
studies, including Siro, MCC++, CDIPI, LIMBTRAN, SASKTRAN, VECTOR, and
McSCIA. To address deficiencies in the GSLS radiance calculations revealed in
earlier comparisons, several recent changes have been added that improve the
accuracy and flexibility of the GSLS model, including
1. improved treatment of the variation of the extinction coefficient with
altitude, both within atmospheric layers and above the nominal top of the
atmosphere;
2. addition of multiple-scattering source function calculations at multiple
solar zenith angles along the line of sight (LOS);
3. introduction of variable surface properties along the limb LOS, with
minimal effort required to add variable atmospheric properties along the LOS
as well;
4. addition of the ability to model multiple aerosol types within the model atmosphere.
The model improvements 1 and 2 are verified by comparison to
previously published results (using standard radiance tables whenever
possible), demonstrating significant improvement in cases for which previous
versions of the GSLS model performed poorly. The single-scattered radiance
errors that were as high as 4% in earlier studies are now generally
reduced to 0.3%, while total radiance errors generally decline from
10% to 1–3%. In all cases, the tangent height dependence of the
GSLS radiance error is greatly reduced. |
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