Switch all (molecular, aerosol, cloud, and ice cloud) absorption off. Please
note that this option simply sets the absorption optical thickness to 0.
If used together with xxx_set_tau this might be a bit confusing but
probably the most logical way. E.g. when using aerosol_default and
aerosol_set_tau 1, the aerosol optical thickness is set to 1,
with 0.940539 scattering and 0.059461 absorption. If no_absorption
is added, the absorption optical thickness is set to 0 while the scattering
optical thickness is preserved at 0.940539 (even though 1 was specified by
the user). We find this the most logical solution of the problem because
by switching no_absorption off and on one tests the effect of the
absorber in an isolated way, rather than mixing absorption and scattering.
The same is true for water and ice clouds. Note, that thermal emission of
molecules is also switched off.
Arve Kylling
2010-03-10