Environmental Engineering Reference
In-Depth Information
Figure 5.2
Diagrammatic representation of the sources and types of atmospheric aerosols
based aerosol mixture recognized by Bolle
et al.
(1986) is maritime in origin. It includes water
and sea-spray particles for the most part, with
only a small proportion of water-soluble particles
(c. 5 per cent).
Aerosols can range in size from a few
molecules to a visible grain of dust, but the
distribution across that range is not even. The
Aerosols of urban and industrial origin are
normally considered to be restricted in their
distribution, since they are mainly released into
the lower troposphere. However, products of
urban combustion found in the Arctic and the
increasing levels of sulphates in the stratosphere,
suggest that their effects now extend beyond the
local area (Shaw 1980). The third geographically
Figure 5.3
A comparison of the size-range of common aerosols with radiation wavelength
