Friday, November 07, 2008

CO2sceptics News Blog | Claim: Current warming sharpest climate change in 5,000 years
...it is simple to refute the assertion of "Current warming sharpest climate change in 5,000 years" as it applies to global temperature. And in the AR4 the IPCC blatantly misrepresented data in an attempt to disguise the fact that there is nothing unusual about the rate of recent global warming.

The current global warming is in fact a cooling since the late 1990s.

The most recent warming phase began ~1970 and ended in 1998. The previous warming phase was from ~1910 to ~1940. The latter of those two most recent warming periods had the same warming rate (within errors of estimation) as the former. And it is important to note that 80% of the anthropogenic GHG emissions were after 1940.

This failure of the "current warming" to be unusually rapid is an embarrasment to the IPCC and the IPCC's response to it in the AR4 deserves much publicity.

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