• Global warming is a direct result of
changes in radiative
forcing. The r.f. is a sum of direct effects such as the enhanced
greenhouse effect +
increased aerosol loads, and indirect
effects such as increased cloud cover (a secondary effect from changes in the geochemical reservoirs).
• The effect of aerosol
particles and
cloud cover is not to alter the greenhouse
effect but to change the amount
of radiation
incident at the surface.
The particles simply
increase the amount of solar
radiation reflected back to space.