Soot 'influences Arctic climate'


	Soot 'influences Arctic climate'

invictus

8-10-2007 8:51 AM

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tags:

climate change, global warming, arctic, ice cores, industry, science

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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/43a004cf-f180-46cf-b573-8534b2ff9427/F4814037-9AFB-47B5-8542-EF3A91DD520A/" 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://news.bbc.co.uk/2/hi/science/nature/6939633.stm" href="http://news.bbc.co.uk/2/hi/science/nature/6939633.stm" style="font-size: 11px;">news.bbc.co.uk</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><DIV class="sh">
					Soot 'influences Arctic climate'
				</DIV></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://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><FONT size="2">
<TABLE width="203" cellspacing="0" cellpadding="0" border="0" align="right"><TBODY><TR><TD><DIV>
				<IMG width="203" vspace="0" hspace="0" height="152" border="0" alt="Arctic ice  Image: BBC" src="http://newsimg.bbc.co.uk/media/images/44049000/jpg/_44049975_arctic_bbc_203.jpg" />
				<DIV class="cap">Human activities have left a visible mark on the Arctic</DIV>
			</DIV>
			</TD></TR></TBODY></TABLE><B>Measurements from ice cores suggest that soot released by industrial activities has influenced climate change in the Arctic.</B>
</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://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><P>
<FONT size="2">The researchers looked at ice cores covering the period 1788 to 2002.
</FONT></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://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><FONT size="2">The natural record shows that concentrations of black carbon, or soot, were particularly bad from 1851 to 1951, Science journal reports.
</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://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><FONT size="2">Soot adds to local climate warming because dark ground absorbs energy from the Sun that white snow would reflect.
</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://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><FONT size="2">Joe McConnell and Ross Edwards from the Desert Research Institute (DRI) in Reno, US, gathered and analysed ice core samples from various regions of Greenland. 
</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://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><FONT size="2">These samples allowed them to analyse annual deposits of soot and other chemicals going back 215 years. 
</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://news.bbc.co.uk/2/hi/science/nature/6939633.stm"><FONT size="2">"In addition to black carbon, we measured a broad range of other chemicals at very high depth resolution in this same ice core," said Dr McConnell.
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