Super-warm climates couldn't prevent ice growth


	Super-warm climates couldn't prevent ice growth

amgumen

4-27-2008 8:20 PM

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climate

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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://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/87a59b6b-508c-4b9a-91e4-1a3118a92329/28A9F2CC-12CF-4678-89D1-6E539DDFCB89/" 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://www.scienceagogo.com/news/20080010165746data_trunc_sys.shtml" href="http://www.scienceagogo.com/news/20080010165746data_trunc_sys.shtml" style="font-size: 11px;">www.scienceagogo.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.scienceagogo.com/news/20080010165746data_trunc_sys.shtml"><FONT size="2" face="Verdana,Arial,Helvetica,sans-serif"> The new study examines geochemical and sea level data retrieved from marine microfossils deposited on the ocean floor 91 million years ago during the Cretaceous Thermal Maximum (also known as the super-greenhouse). This extreme warming event in Earth's history raised tropical ocean temperatures to 35-37°C (95-98.6°F), about 10°C (50°F) warmer than today, thus creating an intense greenhouse climate.</FONT></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://www.scienceagogo.com/news/20080010165746data_trunc_sys.shtml"><FONT size="2" face="Verdana,Arial,Helvetica,sans-serif"> The study found strong evidence that an ice sheet about 50-60 percent the size of the modern Antarctic ice cap existed for about 200,000 years. "Until now it was generally accepted that there were no large glaciers on the poles prior to the development of the Antarctic ice sheet about 33 million years ago," said study co-author Richard Norris. "This study demonstrates that even the super-warm climates of the Cretaceous Thermal Maximum were not warm enough to prevent ice growth."</FONT></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://www.scienceagogo.com/news/20080010165746data_trunc_sys.shtml">Paradoxically, past greenhouse climates may have aided ice growth by increasing the amount of moisture in the atmosp</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/28A9F2CC-12CF-4678-89D1-6E539DDFCB89/blog/" title="blog or email this clip"><img src="http://content9.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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