Re: [asa] UN Downgrades Man's Impact On The Climate

From: Rich Blinne <>
Date: Mon Dec 11 2006 - 13:56:09 EST

On 12/11/06, Rich Blinne <> wrote:

> The aerosols that were predominate in the West did have a slight
> cooling effect but are overwhelmed by the warming effect of CO2. (2.5
> W/m^2 versus -0.5 W/m^2). What's also not stated is that black carbon
> aerosols more prevalent in the developing world can have positive
> forcings. The amount of such aerosols have been going down in the last
> few decades, masking the effects of the CO2 emissions.

A clarification. The phrase "such aerosols" in the last sentence refer
to the non-BC aerosols that have a cooling effect. BC aerosols in
China and other places have been getting worse. This means that the
net effect of aerosols will be accelerating and not decelerating the

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Received on Mon Dec 11 13:57:16 2006

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