Thursday, August 22, 2013

Cleaner air, not CO2, responsible for "global warming"?

Here's a good example of how complicated the earth's environment is...it's a study raising the possibility that the increase in clean air across the globe over the last 40 years plays a significant, and important, role in the temperature record.  How? Cleaner air leads to a brighter atmosphere -- think of the brightness in a room before vs. after the windows have been cleaned -- which, in turn, warms up the planet.  This phenomena is, of course, not accounted for by the enviros in their climate models, though as this statement suggests, it could be critical in our understanding of the temperature record:
A new paper (O’Dowd et al.) from the National University of Ireland presented this summer at the 19th International Conference on Nucleation and Atmospheric Aerosols suggests that clean air laws put in place in the 1970′s and 80′s have resulted in an increase in sunlight impacting the surface of the Earth, and thus have increased surface temperatures as a result.  In one fell swoop, this can explain why surface temperature dipped in the 1970′s, prompting fears of an ice age, followed by concerns of global warming as the air got cleaner after pollution laws and controls were put in place.
There's more of interest in the article over at WattsUpWithThat.