Cloud attenuation: Difference between revisions
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<div class="definition"><div class="short_definition">Usually, the [[attenuation]] of [[microwave radiation]] by [[clouds]].</div><br/> <div class="paragraph">For the centimeter [[wavelength]] band, clouds produce [[Rayleigh scattering]]. The attenuation is due largely to [[scattering]], rather than [[absorption]], for both [[ice]] and water clouds. The cloud attenuation for one-way transmission is <div class="display-formula"><blockquote>[[File:ams2001glos-Ce20.gif|link=|center|ams2001glos-Ce20]]</blockquote></div> where ''M'' (g m<sup> | <div class="definition"><div class="short_definition">Usually, the [[attenuation]] of [[microwave radiation]] by [[clouds]].</div><br/> <div class="paragraph">For the centimeter [[wavelength]] band, clouds produce [[Rayleigh scattering]]. The attenuation is due largely to [[scattering]], rather than [[absorption]], for both [[ice]] and water clouds. The cloud attenuation for one-way transmission is <div class="display-formula"><blockquote>[[File:ams2001glos-Ce20.gif|link=|center|ams2001glos-Ce20]]</blockquote></div> where ''M'' (g m<sup>-3</sup>) is the liquid [[water content]], ρ (g cm<sup>-3</sup>) the [[density]] of water, λ the wavelength, and <div class="inline-formula">[[File:ams2001glos-Cex03.gif|link=|ams2001glos-Cex03]]</div>, where ''m''<sup>2</sup> is the complex [[dielectric constant]]. The attenuation depends only on ''M'', and in the [[range]] of wavelengths from 1 to 10 cm is approximately (1 to 100) × 10<sup>-2</sup>''M'' for water clouds, and (2 to 20) × 10<sup>-2</sup>''M'' for ice clouds.</div><br/> </div> | ||
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Latest revision as of 13:52, 20 February 2012
cloud attenuation[edit | edit source]
For the centimeter wavelength band, clouds produce Rayleigh scattering. The attenuation is due largely to scattering, rather than absorption, for both ice and water clouds. The cloud attenuation for one-way transmission is where M (g m-3) is the liquid water content, ρ (g cm-3) the density of water, λ the wavelength, and 
, where m2 is the complex dielectric constant. The attenuation depends only on M, and in the range of wavelengths from 1 to 10 cm is approximately (1 to 100) × 10-2M for water clouds, and (2 to 20) × 10-2M for ice clouds.
