Cloud attenuation: Difference between revisions

Latest revision as of 14:52, 20 February 2012

cloud attenuation[edit | edit source]

Usually, the attenuation of microwave radiation by clouds.

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.

INDEX
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
0
1
2
3
4
5
6
7
8
9

@@ Line 9: / Line 9: @@
    </div>
-<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>&minus;3</sup>) is the liquid [[water content]], &#x003c1; (g cm<sup>&minus;3</sup>) the [[density]] of water, &#x003bb; 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) &times;  10<sup>&minus;2</sup>''M'' for water clouds, and (2 to 20) &times; 10<sup>&minus;2</sup>''M'' for ice clouds.</div><br/> </div>
+<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]], &#x003c1; (g cm<sup>-3</sup>) the [[density]] of water, &#x003bb; 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) &times;  10<sup>-2</sup>''M'' for water clouds, and (2 to 20) &times; 10<sup>-2</sup>''M'' for ice clouds.</div><br/> </div>
 </div>