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http://hdl.handle.net/2122/2732| Authors: | Del Guasta, M.* Morandi, M.* Stefanutti, L.* Balestri, S.* Rizi, V.* Masci, F.* Stein, B.* Wedekind, C.* Mielke, B.* Immler, F.* Matthey, R.* Mitev, V.* Douart, M.* |
Title: | Evidence for Liquid Droplets in a -65° Cold Cirrus Observed by LIDAR above Sodankyla (Finland) during SESAME | Editors: | Pyle, J. A. Harrys, N. R. P. Amanatidis, G. T. |
Issue Date: | 18-Sep-1995 | Keywords: | Polar Stratospheric Clouds cirrus clouds |
Subject Classification: | 01. Atmosphere::01.01. Atmosphere::01.01.99. General or miscellaneous | Abstract: | It is widely accepted that pure water cannot exist as liquid below about -40°C. Theoretical and laboratory studies confirm this behavior for pure water . Nevertheless, liquid droplets have been seldom observed in cirrus clouds down to -50°C. Miltiwaveleght depolarization LIDAR tecnique can help ti hunt usually cold supercooled clouds. The presence of non-depolarizing cloud layers is indicative of scattering with ylindrical symmetry, possible both with spherical droplets and with ice plates horizontally oriented. In this work, a -65°C cold, non- depolarizing cloud observed in Finland is analysed, concluding thath supercooled droplets are responsible for the absence of depolarization in most of the layer. |
| Appears in Collections: | Conference materials |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| Proc_3_Europ_work_polar_start_ozone_1995_141-144.pdf | 2.85 MB | Adobe PDF | View/Open |
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