Gas Releases Helped End Ice Ages


	Gas Releases Helped End Ice Ages

tabsey

2-26-2008 11:56 PM

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tags:

climate

tabsey says:

Efforts are being made to re-establish wetlands in areas of Australia, but we do have the driest continent.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/3478f1d4-ce3d-4621-a3eb-df1e708c6406/03361D67-8457-48C1-B24D-0D528A6B7630/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://dsc.discovery.com/news/2008/02/26/methane-global-warming.html" href="http://dsc.discovery.com/news/2008/02/26/methane-global-warming.html" style="font-size: 11px;">dsc.discovery.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://dsc.discovery.com/news/2008/02/26/methane-global-warming.html"><P><STRONG>Feb. 26, 2008</STRONG> -- Vast releases from the oceans of a potent greenhouse gas may have helped trigger the <A target="_blank" href="http://dsc.discovery.com/news/2006/08/30/cataclysm_pla.html">ends of past ice ages</A>, says a researcher studying methane levels in ancient ice cores from Antarctica.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://dsc.discovery.com/news/2008/02/26/methane-global-warming.html"><P>Researchers point out the phenomenon could happen again today, possibly accelerating <A target="_blank" href="http://dsc.discovery.com/convergence/globalwarming/globalwarming.html">global warming</A>.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://dsc.discovery.com/news/2008/02/26/methane-global-warming.html"><P>The signals of <A target="_blank" href="http://dsc.discovery.com/news/2007/04/26/magmatrigger_pla.html">sudden methane releases</A> during ice ages were extracted from 400,000 years-worth of ice drilled out of Antarctica's <A target="_blank" href="http://dsc.discovery.com/news/2007/05/18/vostok_pla.html">Lake Vostok</A>. The pattern suggests that there have been spikes in methane releases over and over--right at the times when things are coldest, driest, and the most common modern source--wetlands--are the scarcest.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://dsc.discovery.com/news/2008/02/26/methane-global-warming.html"><P>"There's no way that the wetlands can work," said researcher Kieran O'Hara of the University of Kentucky in Lexington. "Even modern wetlands can't explain the source."</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://dsc.discovery.com/news/2008/02/26/methane-global-warming.html"><P>O'Hara modeled methane releases seen in the ancient ice to try and find out their source. His results appear in an article in the February issue of <EM>Geophysical Research Letters</EM>.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/03361D67-8457-48C1-B24D-0D528A6B7630/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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