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| Titel |
Comparison of aerosol extinction between lidar and SAGE II over Gadanki, a tropical station in India |
| VerfasserIn |
P. Kulkarni, S. Ramachandran |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 33, no. 3 ; Nr. 33, no. 3 (2015-03-18), S.351-362 |
| Datensatznummer |
250121178
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| Publikation (Nr.) |
 copernicus.org/angeo-33-351-2015.pdf |
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| Zusammenfassung |
| An extensive comparison of aerosol extinction has been performed using lidar
and Stratospheric Aerosol and Gas Experiment (SAGE) II data over Gadanki
(13.5° N, 79.2° E), a tropical station in India, following
coincident criteria during volcanically quiescent conditions from 1998 to
2005. The aerosol extinctions derived from lidar are higher than SAGE II
during all seasons in the upper troposphere (UT), while in the lower-stratosphere (LS) values are closer. The seasonal mean percent differences
between lidar and SAGE II aerosol extinctions are > 100% in the UT and
< 50% above 25 km. Different techniques (point and limb observations)
played the major role in producing the observed differences. SAGE II aerosol
extinction in the UT increases as the longitudinal coverage is increased as the
spatial aerosol extent increases, while similar extinction values in LS confirm the zonal
homogeneity of LS aerosols. The study strongly
emphasized that the best meteorological parameters close to the lidar measurement site in terms of space
and time and Ba (sr−1), the
ratio between aerosol backscattering and extinction, are needed for the
tropics for a more accurate derivation of aerosol extinction. |
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