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| Titel |
Technical Note: One year of Raman-lidar measurements in Gual Pahari EUCAARI site close to New Delhi in India – Seasonal characteristics of the aerosol vertical structure |
| VerfasserIn |
M. Komppula, T. Mielonen, A. Arola, K. Korhonen, H. Lihavainen, A.-P. Hyvärinen, H. Baars, R. Engelmann, D. Althausen, A. Ansmann, D. Müller, T. S. Panwar, R. K. Hooda, V. P. Sharma, V.-M. Kerminen, K. E. J. Lehtinen, Y. Viisanen |
| 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 ; 12, no. 10 ; Nr. 12, no. 10 (2012-05-24), S.4513-4524 |
| Datensatznummer |
250011164
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| Publikation (Nr.) |
 copernicus.org/acp-12-4513-2012.pdf |
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| Zusammenfassung |
| One year of multi-wavelength (3 backscatter + 2 extinction + 1
depolarization) Raman lidar measurements at Gual Pahari, close to New Delhi,
were analysed. The data was split into four seasons: spring (March–May),
summer (June–August), autumn (September–November) and winter (December–February). The vertical
profiles of backscatter, extinction, and lidar ratio and their variability
during each season are presented. The measurements revealed that, on
average, the aerosol layer was at its highest in spring (5.5 km). In summer,
the vertically averaged (between 1–3 km) backscatter and extinction
coefficients had the highest averages (3.3 Mm−1 sr−1 and 142 Mm−1
at 532 nm, respectively). Aerosol concentrations were slightly
higher in summer compared to other seasons, and particles were larger in
size. The autumn showed the highest lidar ratio and high extinction-related
Ångström exponents (AEext), indicating the presence of smaller
probably absorbing particles. The winter had the lowest backscatter and
extinction coefficients, but AEext was the highest, suggesting still a
large amount of small particles. |
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