Some clear-headed logic! We know our winters have been warmer in the
last 15 yrs or so, but are figures available for other mid-latitude places, eg
America, Russia which might show how their winters have changed, if at all, in
a similar period? This comparison could tell us a lot. I'd do it myself but
am not quite sure where to look.

Tudor Hughes, Warlingham, Surrey
For one recent study-
Thompson, D. W. J., and J. M. Wallace, 2001: Regional Climate Impacts of the Northern Hemisphere
Annular Mode. Science, 293, 85-89.
http://horizon.atmos.colostate.edu/a...ENCEgalleys.ps
(you may need Ghostscript-
http://www.cs.wisc.edu/%7Eghost/index.html
)
other papers at-
http://horizon.atmos.colostate.edu/a...rs/CliTre.html

--
regards,
david
(add 17 to waghorne to reply)