Quote:
Originally Posted by Peter Ward
I do need to clarify this....
I did not intend to suggest 0.5 degrees/decade is the IPCC's projection, it's simply a random small positive number to illustrate the point.
IPCC 4 states with high confidence, meaning there is robust evidence and data agreement that temperatures by the end of the century will be 2 degrees (globally) higher than they are now (their words, not mine), which of course around 1/4 of one degree per decade, not 1/2 a degree.
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Rehashing obsolete stuff. They were using 90% confidence levels back then.
They've now switched to 95% confidence levels. From memory, (I can't be bothered looking it up again) IPCC5 figures are that they now have very high confidence that by the end of the century the temperature will have increased by between 1C and 7C.
Currently not on track to meet even that huge range.
Regards,
Renato