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| Titel |
Optical thickness and effective radius of Arctic boundary-layer clouds retrieved from airborne nadir and imaging spectrometry |
| VerfasserIn |
E. Bierwirth, A. Ehrlich, M. Wendisch, J.-F. Gayet, C. Gourbeyre, R. Dupuy, A. Herber, R. Neuber, A. Lampert |
| 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 ; 6, no. 5 ; Nr. 6, no. 5 (2013-05-08), S.1189-1200 |
| Datensatznummer |
250017887
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| Publikation (Nr.) |
 copernicus.org/amt-6-1189-2013.pdf |
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| Zusammenfassung |
| Arctic boundary-layer clouds in the vicinity of Svalbard (78° N,
15° E) were observed with airborne remote sensing and in situ
methods. The cloud optical thickness and the droplet effective radius are
retrieved from spectral radiance data from the nadir spot (1.5°,
350–2100 nm) and from a nadir-centred image (40°, 400–1000 nm).
Two approaches are used for the nadir retrieval, combining the signal from
either two or five wavelengths. Two wavelengths are found to be sufficient
for an accurate retrieval of the cloud optical thickness, while the retrieval
of droplet effective radius is more sensitive to the number of wavelengths.
Even with the comparison to in-situ data, it is not possible to definitely
answer the question which method is better. This is due to unavoidable time
delays between the in-situ measurements and the remote-sensing observations,
and to the scarcity of vertical in-situ profiles within the cloud. |
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