- Sep 12, 2008
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The weather data is averaged from reports from stations all over the globe.
What has been happening with the US data, is that it is being lemon picked.
While more weather stations exist than ever before, the US data sets have been shrinking. And the reports that go away are from high altitude, northern latitude, central continental locations. When data is pulled out, the average increases.
Also the data sets that are kept or are added are also suspect. Data sets near airports show an increasing trend just because of development. What was 30 years ago an ocean of grass is now covered in asphalt. But they don't normalize for that, and when they do, they often normalize the wrong way.
Lies damned lies, and global warming.
What has been happening with the US data, is that it is being lemon picked.
While more weather stations exist than ever before, the US data sets have been shrinking. And the reports that go away are from high altitude, northern latitude, central continental locations. When data is pulled out, the average increases.
Also the data sets that are kept or are added are also suspect. Data sets near airports show an increasing trend just because of development. What was 30 years ago an ocean of grass is now covered in asphalt. But they don't normalize for that, and when they do, they often normalize the wrong way.
Lies damned lies, and global warming.
NASA GISS is run by the unbalanced James Hansen, who, as Patrick Michaels recently explained in National Review Online, "became famous for calling coal [shipments] to your local power plant 'death trains' and advocating war-crime trials for the executives who daily force you to put gasoline in your car." Hansen also testified in defense of saboteurs on trial for vandalism at power plant construction sites in Britain, saying their violence was justified by the contribution to global warming that the power plants would produce. He can certainly be relied upon as an objective data source.using the agency's own figures, Smith shows that in 1991, almost a quarter of NOAA's Canadian temperature data came from stations in the high Arctic. The same region contributes only 3% of the Canadian data today. Mr. D'Aleo and Mr. Smith say NOAA and GISS also ignore data from numerous weather stations in other parts of the world, including Russia, the U.S., and China .The result, they say, is a warmer-than-truthful global temperature record. "NOAA systematically eliminated 75% of the world's stations with a clear bias towards removing higher latitude, high altitude and rural locations, all of which have a tendency to be cooler," the authors say. "The thermometers, in a sense, marched towards the tropics, the sea, and to airport tarmacs."