Monday, December 14, 2009

More Temperature Adjustments Controversy - Nashville Tennessee

It looks like we may have another case of temperature being 'adjusted' to the point of turning a cooling trend into a warming one (previous case). This is the crux of the explanation, but you should head over to the source for the rest. Pay close attention the the second chart.

http://wattsupwiththat.com/2009/12/11/would-you-like-your-temperature-data-homogenized-or-pasteurized

"After transforming the row data to column data (see the end of the post for a “bleg” about this), the first thing I did was plot the differences between the two series:



click to enlarge


The GISTemp homogeneity adjustment looks a little hockey-stickish, and induces an upward trend by reducing older historical temperatures more than recent historical temperatures. This has the effect of turning what is a negative trend in the HadCRUT3 data into a positive trend in the GISTemp version:


click to enlarge




So what would appear to be a general cooling trend over the past ~130 years at this location when using the unadjusted HadCRUT3 data, becomes a warming trend when the homogeneity adjustment is supplied.

"

Past related posts:
Berman Post: Leaked/Hacked Emails Suggest Global Warming Fraud Among Top Scientists
Berman Post: Hide The Decline
Berman Post: PJTV on 'ClimateGate'
Berman Post: A New Zealand 'ClimateGate'?
Berman Post: John Holdren (Obama Science Czar) Is Directly Involved With 'ClimateGate'?
Berman Post: 'ClimateGate' or 'ClimaQuiddick'
Berman Post: Original CRU Data Has Been Destroyed
Berman Post: Scientists at Center of 'ClimateGate'/'ClimaQuiddick' Agree to Turn Over All Raw Data ... Sort of
Berman Post: Gibbs on 'ClimateGate'/'ClimaQuiddick' ... 'No Dispute on Climate Chage'
Berman Post: Phil Jones Steps Down Over 'ClimateGate'/'ClimaQuiddick'
Berman Post: Jon Stewart Goofs on 'ClimateGate'/'ClimaQuiddick' Scientists
Berman Post: Silicon Graffiti - Hide The Decline!
Berman Post: UN to Investigate 'ClimateGate'/'ClimaQuiddick'
Berman Post: Dilbert on The Made up Global Warming Numbers, Sort of
Berman Post: Leaked/Hacked 'ClimateGate' Emails Traced to Russia
Berman Post: Understanding "Hide The Decline"
Berman Post: More on Understanding "Hide The Decline"
Berman Post: A NASA ClimateGate?
Berman Post: Another ClimateGate at Darwin Zero?
Berman Post: McAleer Booted For Asking a Tough Question, Again
Berman Post: 'Hockey Stick Graph' in Context
Berman Post: Lord Monckton Debates a Greenpeace Campaigner (Global Warming)

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