In response to contrarian takes on the measurement of global average temperatures, climate scientist demonstrates global warming via historic ocean temperatures and air pressure
In August 2012, John Christy, a climate scientist from the University of Alabama, Huntsville, testified to the Senate Environment and Public Works Committee that the Earth is not warming.
In part, Christy's testimony, a controversial one, was based on what he described as a problem with how surface temperatures are measured and averaged.
See full Article: http://www.scientificamerican.com/article.cfm?id=new-method-proves-climate-change-is-real
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