Show simple item record

contributor authorPlatt, C. M. R.
date accessioned2017-06-09T17:38:59Z
date available2017-06-09T17:38:59Z
date copyright1977/04/01
date issued1977
identifier issn0021-8952
identifier otherams-9244.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4232711
description abstractMeasurements by monostatic lidar of linear depolarization ratios and backscatter coefficients in an altostratus cloud revealed a horizontally layered structure. Three different types of layers were observed. The bottom and central layers had depolarization ratios varying from 0.3 to 0.4, which identified them as layers containing mainly ice. The backscatter coefficients were similar to those found in cirrus ice clouds. A central, transient layer had depolarization ratios characteristic of a high-density water cloud, although the total integrated backscatter of 2.3 ± 1.2 was high for this type of cloud. The top layer had a depolarization ratio of 0.2 at the cloud base, decreasing to 0.04 at the cloud center. Backscatter coefficients ranged up to 30 km?1 and the total integrated backscatter was about 7.6 ± 3.8. This value is considerably higher than the range of values predicted for water or cirrus ice clouds and one possible explanation is that specular reflection was occurring from horizontally aligned ice crystal plates. The variation of backscatter coefficient within each layer was rather regular, with a maximum at the center of the layers. The cloud was situated in a stable air stream and its evolution appeared to be slow.
publisherAmerican Meteorological Society
titleLidar Observation of a Mixed-Phase Altostratus Cloud
typeJournal Paper
journal volume16
journal issue4
journal titleJournal of Applied Meteorology
identifier doi10.1175/1520-0450(1977)016<0339:LOOAMP>2.0.CO;2
journal fristpage339
journal lastpage345
treeJournal of Applied Meteorology:;1977:;volume( 016 ):;issue: 004
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record