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	<title>Climate Science and Politics &#187; UHI</title>
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		<title>Giss versus UAH: 85,7% more warming after 30 years!</title>
		<link>http://climatepatrol.net/2009/01/22/giss-versus-uah-857-more-warming-after-30-years/</link>
		<comments>http://climatepatrol.net/2009/01/22/giss-versus-uah-857-more-warming-after-30-years/#comments</comments>
		<pubDate>Thu, 22 Jan 2009 17:23:14 +0000</pubDate>
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				<category><![CDATA[English Climate Categories]]></category>
		<category><![CDATA[Global Temperature History]]></category>
		<category><![CDATA[Giss-Nasa]]></category>
		<category><![CDATA[Gisstemp]]></category>
		<category><![CDATA[global temperature]]></category>
		<category><![CDATA[temperature 1979-2008]]></category>
		<category><![CDATA[temperature 2008]]></category>
		<category><![CDATA[UAH]]></category>
		<category><![CDATA[UHI]]></category>
		<category><![CDATA[University of Alabama]]></category>

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		<description><![CDATA[Global Temperature 1979-2008 marks an anniversary of 30 years of temperature history of the satellite era. Since the World Meteorological Organization has defined &#8220;climate&#8221; as &#8220;the average weather&#8221; over a classical period of 30 years, we have now a record of a full climate period of near surface temperatures as measured by satellites. This is particularly interesting because surface temperatures records by surface stations are contineously critized as being contaminated by the urban heat island effect of a growing population around the station (UHI effect). Let&#8217;s look at the above graph. At first glance, the five datasets follow more an less the same trend. I have re-baselined the graph by attributing index 0 (zero) to the average temperature of start year 1979 for each metric. Now look at the result:   The temperature of the satellite MSU unit of the University of Alabama indicated thus that temperature in 2008 was +0,28°C above 1979. At the same time, temperature by Giss Nasa land-ocean index rose +0,52°C which indeed means 85,7% more warming of Giss land-ocean compared to UAH-MSU after 30 years of satellite measurements of near surface temperature (lower troposphere). The long-term trendline shows a slope of +0,127°C resp. +0,162°C per decade, which [...]]]></description>
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