<div>This is what may happen:</div>
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<div><a href="http://www.realclimate.org/index.php/archives/2007/02/aerosols-the-last-frontier/#more-406">http://www.realclimate.org/index.php/archives/2007/02/aerosols-the-last-frontier/#more-406</a><br>
<p>The relative lifetimes of CO<sub>2</sub> and aerosol in the atmosphere result in the expectation that reducing fossil fuel use will accelerate warming. A CO<sub>2</sub> molecule has a lifetime of about 100 years in the atmosphere, while an aerosol particle has an average life expectancy of only about 10 days. Therefore, if we instantaneously ceased using combustion engines, the (cooling) fossil fuel-related aerosols would be cleaned out of the atmosphere within weeks, while the (warming) CO<sub>2</sub> would remain much longer, leaving a net positive forcing from the reduction in emissions for a <a href="http://www.realclimate.org/index.php/archives/2006/11/how-much-co2-emission-is-too-much/"><font color="#66aa55">century or more</font></a>.</p>
<span class="gmail_quote">On 2/25/08, <b class="gmail_sendername">Ted Moffett</b> <<a href="mailto:starbliss@gmail.com">starbliss@gmail.com</a>> wrote:</span></div>
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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div>So what happens when coal fired plants, etc., stop releasing aerosals into the atmosphere that have a cooling effect, that are reducing warming from CO2 emissions, in part from the same coal fired plants?</div>
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<div><a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.realclimate.org/index.php/archives/category/climate-science/aerosols/" target="_blank">http://www.realclimate.org/index.php/archives/category/climate-science/aerosols/</a></div>
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<div>Ted Moffett</div>
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