Lidar observations of the horizontal orientation of ice crystals in cirrus clouds

Lidar observations of the horizontal orientation of ice crystals in cirrus clouds

ABSTRACT A scanning lidar system has been used at Aberystwyth (52.4°N, 4.1°W) to measure the backscatter and depolarization ratios in cirrus clouds. The measurements indicate that the height of maximum occurrence was near 9 km and that about 50% of clouds showed the presence at some height of ice cr...

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Veröffentlicht in:Tellus. Series B, Chemical and physical meteorology Chemical and physical meteorology, 1990, Vol.42 (2), p.211-216
Hauptverfasser: THOMAS, L., CARTWRIGHT, J. C., WAREING, D. P.
Format: Artikel
Sprache:eng
Schlagworte:
Cloud physics
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
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Zusammenfassung:ABSTRACT A scanning lidar system has been used at Aberystwyth (52.4°N, 4.1°W) to measure the backscatter and depolarization ratios in cirrus clouds. The measurements indicate that the height of maximum occurrence was near 9 km and that about 50% of clouds showed the presence at some height of ice crystals having a near horizontal orientation. The angular dependence of the backscatter about the vertical showed that the maximum tilt angle of these crystals from the horizontal plane was about 0.3°.
ISSN:0280-6509
1600-0889
DOI:10.1034/j.1600-0889.1990.00001.x-i1