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<table border="0" cellpadding="3" cellspacing="1" width="100%" class="forumline"> <tr> <th class="thCornerL" width="22%" height="26">Author</th> <th class="thCornerR">Message</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>cheapbag214s</b></span></td> <td class="row1" height="28" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="http://picsrv.fora.pl/Aeolus/images/icon_minipost.gif" width="12" height="9" alt="Post" title="Post" border="0" /><span class="postdetails">Posted: Wed 10:21, 13 Nov 2013<span class="gen"> </span> Post subject: while feldspars account for only about 3 percent</span></td> </tr> <tr> <td colspan="2"><hr /></td> </tr> <tr> <td colspan="2"><span class="postbody">Study: Feldspar minerals key to create ice formation in certain clouds <br />LEEDS, England, June 12 () -- A small amount of feldspar minerals in certain clouds pack a wallop when generating ice formations,[url=http://www.christianlouboutinonlineshop.de/]christian louboutin online shop[/url], British, German and U.S. researchers say.The discovery contrasts with the prevailing view that clay minerals were the most important component of atmospheric mineral dust for ice formation in mixed-phase clouds, the research published Wednesday in Nature indicated.The amount of ice in clouds affects cloud extent, life span and energy-sending properties, which can influence climate.Clay minerals contribute about two-thirds of the dust mass, while feldspars account for only about 3 percent, Benjamin Murray of the University of Leeds in Britain, and his co-authors said. Despite its relatively small presence, researchers demonstrated feldspar minerals dominate ice nucleation in clouds with a mixture of water droplets and ice particles. Nucleation is the process by which ice crystals and raindrops form in clouds around a solid core.The research also showed that feldspar particles, at certain temperatures, may account for a large proportion of the ice nuclei in Earth's atmosphere. Desert dust is considered a key source of ice nuclei, particles that enable ice to form above a cloud's normal freezing threshold.Thomas Koop of Bielefeld University in Germany and Natalie Mahowald of Cornell University in Ithaca, N.Y., also participated in the research.</span></td> </tr> </table></td> </tr> <tr> <td colspan="2" height="1" class="spaceRow"><img src="http://picsrv.fora.pl/Aeolus/images/spacer.gif" alt="" width="1" height="1" /></td> </tr> </table>
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