Lidar Measurements of Clouds
Clouds present one of the most difficult challenges in the quantitative description of radiative transfer in the atmosphere. They occur widely in the atmosphere and have a great diversity of physical characteristics such as their position, extent, water content, droplet size, ice content, etc. Optically they present a broad range of properties which are generally described in terms of parameters such as, extinction, reflectance and emissivity. One of the dominant characteristics of all clouds is their large variability in both space and time. It is this aspect which makes an accurate modelling of their optical properties in any radiative transfer calculations very difficult — particularly since cloud optical data with good spatial and temporal resolution are still quite limited.
KeywordsMultiple Scattering Liquid Water Content Backscatter Signal Lidar System Lidar Measurement
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