Shortwave IR Window Channel (3.9 micron)

Reflective Properties: 3.9 Micron Scattering by Ice and Water (Page 3 of 8)

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A graph of single scattering albedo for liquid water and for ice at minus 50 degrees Celcius

As seen in the graph, reflection at 3.9 microns by a cloud is a function of both cloud phase and droplet size. Droplet radii in water clouds range between 5 and 20 microns, while ice particles in cirrus clouds are often 50 microns or larger. Therefore, water clouds are much more reflective than ice clouds at 3.9 microns.


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