Tag Archives: Fifth Assessment Report

In the final draft of its new report the IPCC has significantly slashed its predictions for how much the climate will warm in the coming decades.

From the second to the final draft of its newest report the IPCC significantly slashed its predictions for how much the climate will warm in the coming decades.

In the second draft of the Fifth Assessment Report it had broadly agreed with the models that the world will warm by 0.4 to 1.0 Cº from 2016-2035 against 1986-2005. But in the final draft it quietly cut the 30-year projection to 0.3-0.7 Cº, saying the warming is more likely to be at the lower end of the range [equivalent to about 0.4 Cº over 30 years]. If that rate continued till 2100, global warming this century could be as little as 1.3 Cº.

This will bring the IPCC’s predictions more in line with the reality of the past two decades, which has seen a complete pause in any warming.

This is actually very good news, as it suggests that the good scientists in the climate community are beginning to regain control of the science. Rather than bend to the political winds, the IPCC is being forced to bend to the data itself. Nonetheless, no one should be sanguine about the situation. As noted by Christopher Monckton at the link,

Multiple lines of evidence now confirm that the models and consequently the IPCC have overestimated global warming. Yet neither that misconceived organization nor any of its host of unthinking devotees has displayed any remorse. Instead, they persist in maintaining that the warming is temporarily paused, though they cannot really explain why; or they blame particulate aerosols, their get-out-of-jail-free fudge-factor; or they pretend warming is really continuing unabated, saying it has gone into hiding deep in the oceans where, conveniently, we cannot measure it, or that the Earth-atmosphere system has a fever driven by four atom-bombs’-worth of heat content increase every second.

What they are not prepared to countenance, notwithstanding the real-world, measured evidence, is the growing probability that they and their precious models have so badly misunderstood the climate, or so well understood it and so badly misrepresented it, that global warming is simply not going to occur at anything like any of the exaggerated rates that they had until now so confidently over-predicted.

Read the whole thing. Look especially at Figure 9, the last figure, as it shows the data in comparison with the predictions in all the IPCC reports.