Re: Global warming: Climate change and evolution

>
> temperatures
> across a broad swathe of northern Canada have been 20° C higher than
> normal for the past month, the record temperatures are coming despite
> the lowest levels of solar activity in a century and a La Nina effect
> that should be making Canada colder rather than warmer, and so on.


This is not overall warming per se, as it is just cold air being replaced
with warm. From NY
Times<http://www.nytimes.com/2011/01/25/science/earth/25cold.html>
:

A pattern of atmospheric circulation that tends to keep frigid air penned in
> the Arctic has weakened during the last two winters, allowing big tongues of
> cold air to descend far to the south, while masses of warmer air have moved
> north.

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