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| Titel |
Aerosol extinction-to-backscatter ratio derived from passive satellite measurements |
| VerfasserIn |
F.-M. Bréon |
| 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 ; 13, no. 17 ; Nr. 13, no. 17 (2013-09-06), S.8947-8954 |
| Datensatznummer |
250085680
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| Publikation (Nr.) |
 copernicus.org/acp-13-8947-2013.pdf |
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| Zusammenfassung |
| Spaceborne reflectance measurements from the POLDER instrument are used to
study the specific directional signature close to the backscatter direction.
The data analysis makes it possible to derive the extinction-to-backscatter
ratio (EBR), which is related to the inverse of the scattering phase function
for an angle of 180° and is needed for a quantitative
interpretation of lidar observations (active measurements). In addition, the
multidirectional measurements are used to quantify the scattering phase
function variations close to backscatter, which also provide some indication
of the aerosol particle size and shape. The spatial distributions of both
parameters show consistent patterns that are consistent with the aerosol
type distributions. Pollution aerosols have an EBR close to 70, desert dust
values are on the order of 50 and EBR of marine aerosols is close to 25. The
scattering phase function shows an increase with the scattering angle close
to backscatter. The relative increase ∂lnP/∂γ is
close to 0.01 for dust and pollution type aerosols and 0.06 for marine type
aerosols. These values are consistent with those retrieved from Mie
simulations. |
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