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I don't think it is a case of either/or.  There are numerous factors at work and I chose to highlight one.  What I found interesting, as a non climate scientist, is the quite drastic effect relatively small changes in average global temperatures can have in particularly regions, and the degree to which even non-anthropogenic climate change has, in the past, led to quite sudden and dramatic changes in Europe in particular.

Petoukhov talks of other correlations being stronger, but the excerpts you quote don't really provide a theory of causation which explains why low ice in the East Arctic should result in colder winters in NW Europe and doesn't exclude the possibility of global warming ->low Arctic sea ice -> reduced thermohaline circulation -> weaker NAD -> colder winters.

In any case, I'm not qualified to debate the finer points of the available evidence and theories. My purpose was to demonstrate that whilst you cannot prove that exceptionally cold winters in NW Europe are caused by global warming, you cannot exclude that possibility either, and there is no reason why slow and gradual global trends cannot lead the sudden and dramatic localised fluctuations.

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by Frank Schnittger (mail Frankschnittger at hot male dotty communists) on Wed Dec 8th, 2010 at 11:15:25 AM EST
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I find the evidence fairly compelling that there is a causal link between global warming and colder European winters. For the rest, I agree with you completely.

Thanks for the excuse to update my understanding of this subject...

Anyway, if you won't believe me (and who could blame you), perhaps you'll believe...

the UK Met Office?

It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II

by eurogreen on Wed Dec 8th, 2010 at 12:01:44 PM EST
[ Parent ]
Meteorological office for anything.  

Just not relevant.  

I don't mean to pick on the UK--I wouldn't believe the US either.  

From your link

according to Vicky Pope, Head of Climate Change for Government at the UK Meteorological Office
 

Not to be rude, but lying is their job.  

The Fates are kind.

by Gaianne on Thu Dec 9th, 2010 at 02:56:52 AM EST
[ Parent ]
Gaianne:
Not to be rude, but lying is their job.  

I'm not sure I understand why this has to be the case.  What are the institutional/class interests which are served by falsifying climate science?

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by Frank Schnittger (mail Frankschnittger at hot male dotty communists) on Thu Dec 9th, 2010 at 04:34:03 AM EST
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