The
scattering coefficient per particle
(
);
where
is the number concentration of particles
(
) and
is the
scattering cross-section.
,
the
scattering component of
extinction due to gas and particles, is measured in the atmosphere using a nephelometer. For a homogeneous atmosphere it is related in theory to the meteorological range
(
):
;
and
represent the
scattering and absorption
coefficients per unit length for a light beam (of path length
) which has a
spectral radiance (intensity)
incident on a sample of air and
is the transmitted
spectral radiance (intensity),
.
Source:
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2212
