Wednesday, 9 August 2017

1900. HadCrut4.

Three claims for the global historical surface temperature anomaly of the January-to-December calendar year 1900, which is between:- 

-0·45(±0)ºC and +0·05(±0)ºC”.................Claim #1. 
-0·34(±0)ºC and  -0·06(±0)ºC”.................Claim #2. 
-0·38(±0)ºC and  -0·23(±0)ºC”.................Claim #3.

The monthly series of HadCrut4 version 4·0·0·0 entails claim #1. The annual series of HadCrut4 version 4·0·0·0 entails claim #2. The annual series of HadCrut4 version 4·0·0·0decadally smoothed by the application of a 21 point binomial filter entails claim #3. Alternative link for HadCrut4 version 4·0·0·0. Question. If the upper and lower limits of the global historical surface temperature anomaly of any interval depend on the method of their calculation, then in what sense are these limits real entities?

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