Transcrito do artigo Global Warming de Stephen Nodvin (2009/02/02) divulgado no Portal “The Encyclopedia of Earth (

(…)  The NCDC 2006 report also described temperature trends aloft in the atmosphere measured over the past 50 to 60 years using balloon-borne instruments (radiosondes) and for the past 28 years using satellites. The report states that temperature data collected from approximately 5,000 to 30,000 feet above the surface indicate that 1958-2006 global temperature trends in the middle troposphere are similar to trends in surface temperature; 0.12°C/decade for surface and 0.15°C/decade for mid-troposphere.

On 2 February 2007, the Intergovernmental Panel on Climate Change (IPCC) released the Summary For Policymakers (SPM), an executive summary of the first volume of its 4th Assessment Report entitled, “The Physical Science Basis of Climate Change.” The IPCC Report documents that not only do the records show a warming trend during the past half century in land-based temperature data but also in global ocean temperature measurements. The increases in ocean temperatures indicate global warming trends are not an artifact of urbanization or the so-called “heat-island” effect. (…)



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