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.

"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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