According to the 2007 Fourth Assessment Report by the Intergovernmental Panel on Climate Change (IPCC), global surface temperature increased by 0.74 ± 0.18 °C during the 20th century.
The UAH globally averaged satellite based temperature for March 2011 is out. From a high of +0.72 deg C in January 2010, global temperature anomaly has plunged - 0.1 deg C by March 2011 or a drop of 0.8 deg C within a span of 15 months. That’s a magnitude nearly equivalent to IPCC’s global warming signal - an extremely sharp precipitous drop.
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