SEARCH BLOG: GIGO
Three months ago, I posted "Global Warming GIGO" which told about a small, grass-roots effort that was seeking to determine the state of the weather stations used to gather temperature data for NOAA that has been a significant part of the basis for the claim of global warming.
Now, an initial report of 33% of those stations has been published by Anthony Watts that shows the following:
The CRN site rating system is described here:
"Climate Reference Network Rating Guide - Class 1 and 2 are considered best, 5 is the worst.
Class 1 - Flat and horizontal ground surrounded by a clear surface with a slope below 1/3 (<19deg).>3 degrees.
Class 2 - Same as Class 1 with the following differences. Surrounding Vegetation <25>5deg.
Class 3 (error 1C) - Same as Class 2, except no artificial heating sources within 10 meters.
Class 4 (error >= 2C) - Artificial heating sources <10>
Class 5 (error >= 5C) - Temperature sensor located next to/above an artificial heating source, such a building, roof top, parking lot, or concrete surface."
Fully 70% of the sites surveyed have Class 4 and Class 5 site location problems that cause significant overstatement of temperatures.Who would have thought that global warming was caused by artificial heating sources?
As the old saying goes, Garbage In; Garbage Out.