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| Titel |
The definition of an atmospheric database for Aeolus |
| VerfasserIn |
G. J. Marseille, K. Houchi, J. Kloe, A. Stoffelen |
| 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 ; 4, no. 1 ; Nr. 4, no. 1 (2011-01-21), S.67-88 |
| Datensatznummer |
250001568
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| Publikation (Nr.) |
 copernicus.org/amt-4-67-2011.pdf |
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| Zusammenfassung |
| The definition of an atmospheric database is an important component of
simulation studies in preparation of future earth observing remote sensing
satellites. The Aeolus mission, formerly denoted Atmospheric Dynamics Mission
(ADM) or ADM-Aeolus, is scheduled for launch end of 2013 and aims at
measuring profiles of single horizontal line-of-sight (HLOS) wind
components from the surface up to about 32 km with a global coverage. The
vertical profile resolution is limited but may be changed during in-orbit
operation. This provides the opportunity of a targeted sampling strategy,
e.g., as a function of geographic region. Optimization of the vertical (and
horizontal) sampling strategy requires a characterization of the atmosphere
optical and dynamical properties, more in particular the distribution of
atmospheric particles and their correlation with the atmospheric dynamics.
The Aeolus atmospheric database combines meteorological data from the ECMWF
model with atmosphere optical properties data from CALIPSO. An inverse
algorithm to retrieve high-resolution particle backscatter from the CALIPSO
level-1 attenuated backscatter product is presented. Global weather models
tend to underestimate atmospheric wind variability. A procedure is described
to ensure compatibility of the characteristics of the database winds with
those from high-resolution radiosondes. The result is a high-resolution
database of zonal, meridional and vertical wind, temperature, specific
humidity and particle and molecular backscatter and extinction at 355 nm
laser wavelength. This allows the simulation of small-scale atmospheric
processes within the Aeolus observation sampling volume and their impact on
the quality of the retrieved HLOS wind profiles. The database
extends over four months covering all seasons. This allows a statistical
evaluation of the mission components under investigation. The database is
currently used for the development of the Aeolus wind processing, the
definition of wind calibration strategies and the optimization of the Aeolus
sampling strategy. |
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