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Overnight Open Thread (Mætenloch) »
December 12, 2009
Homogenizing Nashville to Hide the Decline
If I'm reading the chart right (and I think I am), below shows not the temperature in Nashville, but the adjustments made to the temperature, going from raw readings to "homogenized" adjusted numbers. The scale on the left shows you the size of the adjustments.
You will notice that all early temperatures are adjusted downwards, which, in effect, adjusted the current temperature quite a bit upwards. (But note the current temperatures are barely being adjusted here; it's the older ones being pushed down.)
Here is the true trend in real temperatures vs. the supposed trend when the numbers are "homogenized."
Nashville's been trending quite a bit colder -- but once we homogenize, we get a slight upward trend.
How many of the world's weather stations are similarly homogenized to show trends that don't exist at all but for manipulation>
Full story at Watt's Up With That? I only do pictures.