Ira Glickstein: IPCC Global Warming Predictions ‘Seriously Flawed’

  • Date: 20/12/12
  • Ira Glickstein, Watts Up With That

Global temperature observations over the more than two decades since the First IPCC Assessment Report demonstrate that the IPCC climate theory, and models based on that theory, are wrong. Therefore, they must be greatly modified or completely discarded.

The animated graphic is based on Figure 1-4 from the recently leaked IPCC AR5 draft document. This one chart is all we need to prove, without a doubt, that IPCC analysis methodology and computer models are seriously flawed. They have way over-estimated the extent of Global Warming since the IPCC first started issuing Assessment Reports in 1990, and continuing through the fourth report issued in 2007.

When actual observations over a period of up to 22 years substantially contradict predictions based on a given climate theory, that theory must be greatly modified or completely discarded.

IPCC AR5 draft figure 1-4 with animated central Global Warming predictions from FAR (1990), SAR (1996), TAR (2001), and AR5 (2007).

IPCC AR5 draft figure 1-4 with animated central Global Warming predictions from FAR (1990), SAR (1996), TAR (2001), and AR5 (2007).

IPCC SHOT FOUR “ARROWS” – ALL HIT WAY TOO HIGH FOR 2012

The animation shows arrows representing the central estimates of how much the IPCC officially predicted the Earth surface temperature “anomaly” would increase from 1990 to 2012. The estimates are from the First Assessment Report (FAR-1990), the Second (SAR-1996), the Third (TAR-2001), and the Fourth (AR4-2007). Each arrow is aimed at the center of its corresponding colored “whisker” at the right edge of the base figure.

The circle at the tail of each arrow indicates the Global temperature in the year the given assessment report was issued. The first head on each arrow represents the central IPCC prediction for 2012. They all mispredict warming from 1990 to 2012 by a factor of two to three. The dashed line and second arrow head represents the central IPCC predictions for 2015.

Actual Global Warming, from 1990 to 2012 (indicated by black bars in the base graphic) varies from year to year. However, net warming between 1990 and 2012 is in the range of 0.12 to 0.16˚C (indicated by the black arrow in the animation). The central predictions from the four reports (indicated by the colored arrows in the animation) range from 0.3˚C to 0.5˚C, which is about two to five times greater than actual measured net warming.

The colored bands in the base IPCC graphic indicate the 90% range of uncertainty above and below the central predictions calculated by the IPCC when they issued the assessment reports. 90% certainty means there is only one chance in ten the actual observations will fall outside the colored bands.

The IPCC has issued four reports, so, given 90% certainty for each report, there should be only one chance in 10,000 (ten times ten times ten times ten) that they got it wrong four times in a row. But they did! Please note that the colored bands, wide as they are, do not go low enough to contain the actual observations for Global Temperature reported by the IPCC for 2012.

Thus, the IPCC predictions for 2012 are high by multiples of what they thought they were predicting! Although the analysts and modelers claimed their predictions were 90% certain, it is now clear they were far from that mark with each and every prediction.

IPCC PREDICTIONS FOR 2015 – AND IRA’S

The colored bands extend to 2015 as do the central prediction arrows in the animation. The arrow heads at the ends of the dashed portion indicate IPCC central predictions for the Global temperature “anomaly” for 2015. My black arrow, from the actual 1990 Global temperature “anomaly” to the actual 2012 temperature “anomaly” also extends out to 2015, and let that be my prediction for 2015:

  • IPCC FAR Prediction for 2015: 0.88˚C (1.2 to 0.56)
  • IPCC SAR Prediction for 2015: 0.64˚C (0.75 to 0.52)
  • IPCC TAR Prediction for 2015: 0.77˚C (0.98 to 0.55)
  • IPCC AR5 Prediction for 2015: 0.79˚C (0.96 to 0.61)
  • Ira Glickstein’s Central Prediction for 2015: 0.46˚C

Please note that the temperature “anomaly” for 1990 is 0.28˚C, so that amount must be subtracted from the above estimates to calculate the amount of warming predicted for the period from 1990 to 2015.

IF THEORY DIFFERS FROM OBSERVATIONS, THE THEORY IS WRONG

As Feynman famously pointed out, when actual observations over a period of time contradict predictions based on a given theory, that theory is wrong!

Global temperature observations over the more than two decades since the First IPCC Assessment Report demonstrate that the IPCC climate theory, and models based on that theory, are wrong. Therefore, they must be greatly modified or completely discarded. Looking at the scattershot “arrows” in the graphic, the IPCC has not learned much about their misguided theories and flawed models or improved them over the past two decades, so I cannot hold out much hope for the final version of their Assessment Report #5 (AR5).

Keep in mind that the final AR5 is scheduled to be issued in 2013. It is uncertain if Figure 1-4, the most honest IPCC effort of which I am aware, will survive through the final cut. We shall see.

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