DEPOLARIZATION LIDAR DETERMINATION OF CLOUD-BASE MICROPHYSICAL PROPERTIES.
In: EPJ Web of Conferences, Jg. 119 (2016-07-15), S. 1-5
Online
Konferenz
Zugriff:
The links between multiple-scattering induced depolarization and cloud microphysical properties (e.g. cloud particle number density, effective radius, water content) have long been recognised. Previous efforts to use depolarization information in a quantitative manner to retrieve cloud microphysical cloud properties have also been undertaken but with limited scope and, arguably, success. In this work we present a retrieval procedure applicable to liquid stratus clouds with (quasi-)linear LWC profiles and (quasi-)constant number density profiles in the cloud-base region. This set of assumptions allows us to employ a fast and robust inversion procedure based on a lookup- table approach applied to extensive lidar Monte-Carlo multiple-scattering calculations. An example validation case is presented where the results of the inversion procedure are compared with simultaneous cloud radar observations. In non-drizzling conditions it was found, in general, that the lidar- only inversion results can be used to predict the radar reflectivity within the radar calibration uncertainty (2-3 dBZ). Results of a comparison between ground-based aerosol number concentration and lidar-derived cloud base number considerations are also presented. The observed relationship between the two quantities is seen to be consistent with the results of previous studies based on aircraft-based in situ measurements. [ABSTRACT FROM AUTHOR]
Titel: |
DEPOLARIZATION LIDAR DETERMINATION OF CLOUD-BASE MICROPHYSICAL PROPERTIES.
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Autor/in / Beteiligte Person: | Donovan, D. P. ; Baltink, H. Klein ; Henzing, J. S. ; de Roode, S. ; Siebesma, A. P. |
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Zeitschrift: | EPJ Web of Conferences, Jg. 119 (2016-07-15), S. 1-5 |
Quelle: | 2016, Vol. 119, p1-5. 5p.; Jg. 119 (2016-07-15) S. 1-5 |
Veröffentlichung: | 2016 |
Medientyp: | Konferenz |
ISSN: | 2101-6275 (print) |
DOI: | 10.1051/epjconf/201611916010 |
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