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| Titel |
First results from a rotational Raman scattering cloud algorithm applied to the Suomi National Polar-orbiting Partnership (NPP) Ozone Mapping and Profiler Suite (OMPS) Nadir Mapper |
| VerfasserIn |
A. Vasilkov, J. Joiner, C. Seftor |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 9 ; Nr. 7, no. 9 (2014-09-10), S.2897-2906 |
| Datensatznummer |
250115894
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| Publikation (Nr.) |
 copernicus.org/amt-7-2897-2014.pdf |
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| Zusammenfassung |
| This paper reports initial results from an Ozone Mapping and Profiler Suite
(OMPS) Nadir Mapper cloud pressure and cloud fraction algorithm. The OMPS
cloud products are intended for use in OMPS ozone or other trace-gas
algorithms. We developed the OMPS cloud products using a heritage algorithm
developed for the Ozone Monitoring Instrument (OMI) on NASA's Aura satellite.
The cloud pressure algorithm utilizes the filling-in of ultraviolet solar
Fraunhofer lines by rotational Raman scattering. The OMPS cloud products are
evaluated by comparison with OMI cloud products that have been compared in
turn with other collocated satellite data including cloud optical thickness
profiles derived from a combination of measurements from the CloudSat radar
and MODerate-resolution Imaging Spectroradiometer (MODIS). We find that the probability density
functions (PDFs) of effective cloud fraction retrieved from OMPS and OMI
measurements are very similar. The PDFs of the OMPS and OMI cloud pressures
are comparable. However, OMPS retrieves somewhat higher pressures on average.
The current NASA total ozone retrieval algorithm makes use of a monthly
gridded cloud pressure climatology developed from OMI. This climatology
captures much of the variability associated with the relevant cloud
pressures. However, the use of actual cloud pressures retrieved with OMPS in
place of the OMI climatology changes OMPS total column ozone estimates
locally (presumably in the correct direction) only in areas with large
differences between climatological and actual cloud pressures. The ozone differences can
be up to 5% in such areas. |
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