Deutsche Bank on the MWP
Sep 9, 2010
Bishop Hill in Climate: MWP

Deutsche Bank has issued a document which purports to "address major skeptic arguments". You know what to expect, but one thing stood out: the treatment of the medieval warm period:

Northern hemisphere temperatures in the Medieval Warming Period (MWP) may have been comparable to today, but the estimates have high uncertainty because there are so few records and spatial coverage is spotty. However, a MWP warmer than the last decade does not challenge the case for anthropogenic warming.

Now this is quite interesting, because Deutsche Bank's advisers, who are from Columbia University, seem to have a rather different take on the issue to the IPCC, who say, as we all know, that modern temperatures are "very likely" higher than any other period in the past 1000 years.

Like Professor Kelly, one can't help but wonder how the IPCC came up with a statement of such certainty based on such limited data.


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