The indirect aerosol effect on clouds is non-linear [1], [76] such that it has been suggested that even the modest
aerosol amounts added by pre-industrial humans to an otherwise pristine atmosphere may have caused a significant climate forcing [59].
Jack
added: «Dust is one of the most important
aerosols for both the climate and the biology of an environment, and so understanding the
amount of dust produced, and the distance and direction it travels is vital to allow us to understand its effect better.»
«Comparing the
amount of warming in the U.S. saved by reducing our greenhouse gas emissions by some 80 % to the
amount of warming
added in the U.S. by increases in Asian black carbon (soot)
aerosol emissions (at least according to Teng et al.) and there is no clear winner.
shows that natural VOC induced
aerosols above the boundary layer are mostly of natural origin (7:1), and comprise a 2:1 up to > 10:1
amount, compared to SOx (SO2 + sulfate)
aerosols in the 0.5 - 10 km free troposphere, or 10 % of the total
aerosol optical depth measured by satellites...
Add to that the effect below the boundary layer and the effect of other natural
aerosols (natural fires, sea salt, sand dust, DMS, NOx), good for some 38 % of the < 1 micron fraction of total
aerosols (according to IPCC estimates)...