<div><a href="http://www.physorg.com/news177254019.html">http://www.physorg.com/news177254019.html</a></div>
<div> </div>
<div><a href="http://www.ucar.edu/news/releases/2009/maxmin.jsp">http://www.ucar.edu/news/releases/2009/maxmin.jsp</a></div>
<div> </div>
<div>
<div align="center"><a href="http://www.ucar.edu/news/releases/2009/images/temps_2.jpg"><img height="331" alt="temps" src="http://www.ucar.edu/news/releases/2009/images/temps_2med.jpg" width="504"></a><a href="http://www.fin.ucar.edu/netpub/server.np?find&site=imagelibrary&catalog=catalog&template=detail.np&field=itemid&op=matches&value=2122" target="_blank"></a> </div>
<p class="caption">This graphic shows the ratio of record daily highs to record daily lows observed at about 1,800 weather stations in the 48 contiguous United States from January 1950 through September 2009. Each bar shows the proportion of record highs (red) to record lows (blue) for each decade. The 1960s and 1970s saw slightly more record daily lows than highs, but in the last 30 years record highs have increasingly predominated, with the ratio now about two-to-one for the 48 states as a whole. <a class="captionEnlarge onscreen" href="http://www.ucar.edu/news/releases/2009/images/temps_2.jpg" target="_blank">[ENLARGE]</a> (ŠUCAR, graphic by Mike Shibao.) <a onclick="MM_openBrWindow('../../common/news-disclaimer.html','disclaimer','width=400,height=300')" href="http://www.ucar.edu/news/releases/2009/maxmin.jsp#">News media terms of use*</a></p>
<p class="caption">-------------------------</p>
<p class="h2gold">More records ahead </p>
<p>In addition to surveying actual temperatures in recent decades, Meehl and his co-authors turned to a sophisticated computer model of global climate to determine how record high and low temperatures are likely to change during the course of this century. </p>
<p>The modeling results indicate that if nations continue to increase their emissions of greenhouse gases in a "business as usual" scenario, the U.S. ratio of daily record high to record low temperatures would increase to about 20-to-1 by mid-century and 50-to-1 by 2100. The mid-century ratio could be much higher if emissions rose at an even greater pace, or it could be about 8-to-1 if emissions were reduced significantly, the model showed.</p>
<p>------------------------------------------</p>
<p>Vision2020 Post: Ted Moffett</p></div>