Lidar monitoring of clouds

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Authors
  1. Bissonnette, L.R.
  2. Roy, G.
  3. Cober, S.G.
  4. Isaac, G.A.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The lidar has long been proposed as a potential remote sensor of cloud microphysical and optical parameters. The conventional lidar has had only mixed success because retrieval in a medium of such density requires an independently measured boundary value deep in the cloud and a relation between backscatter and extenction. The solution we propose is to make detection at multiple fields of view (MFOV) and exploit the additional information provided by multiple scattering. In this paper, we compare MFOV-based ladar retrievals with in situ measurements of the liquid water content and droplet diameters in liquid-phase stratus clouds. The results show good correlation between the lidar solutions and the in situ data, but a constant bias of 20-30% depending on the parameter. The bias is reduced to 10% if comparisons are restricted to the cloud base region accessible to the lidar. Another significant conclusion is that the lidar solutions are, within 20-30%, statistically representative of the complete layer in spite of the limited penetration range.
Keywords
MFOV (Multiple Fields Of View)
Date of publication
30 Sep 2001
Number of Pages
14
Reprinted from
SPIE, vol 4539, 2002, p 8-17
DSTKIM No
CA020298
CANDIS No
517054
Format(s):
Hardcopy;Document Image stored on Optical Disk

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