INDEPENDENT MEASUREMENT OF EXTINCTION AND BACKSCATTER PROFILES IN CIRRUS CLOUDS BY USING A COMBINED RAMAN ELASTIC-BACKSCATTER LIDAR

被引：586
作者：
ANSMANN, A
WANDINGER, U
RIEBESELL, M
WEITKAMP, C
MICHAELIS, W
机构：
[1] Nstitut fr Physik, GKSS-Forschungszentrum Geesthacht GmbH, Geesthacht, W-2054
来源：
APPLIED OPTICS | 1992年 / 31卷 / 33期
关键词：
COMBINED LIDAR; RAMAN LIDAR; BACKSCATTER LIDAR; LIDAR RATIO; PARTICLE EXTINCTION; PARTICLE BACKSCATTER; KLETT METHOD; CIRRUS OBSERVATION;
D O I：
10.1364/AO.31.007113
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Height profiles of the extinction and the backscatter coefficients in cirrus clouds are determined independently from elastic- and inelastic- (Raman) backscatter signals. An extended error analysis is given. Examples covering the measured range of extinction-to-backscatter ratios (lidar ratios) in ice clouds are presented. Lidar ratios between 5 and 15 sr are usually found. A strong variation between 2 and 20 sr can be observed within one cloud profile. Particle extinction coefficients determined from inelastic-backscatter signals and from elastic-backscatter signals by using the Klett method are compared. The Klett solution of the extinction profile can be highly erroneous if the lidar ratio varies along the measuring range. On the other hand, simple backscatter lidars can provide reliable information about the cloud optical depth and the mean cloud lidar ratio.
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页码：7113 / 7131
页数：19
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