In article .com,
Roger Coppock wrote:
Angell Global Ground Level Balloon Data 1958-2004 from:
http://cdiac.esd.ornl.gov/trends/tem...ll/angell.html

Just like the ground level observer data, the
warming rate is faster in winter than the summer.
Annual .16 +- .02 K/decade
Winter .18 +- .03 K/decade
Spring .17 +- .03 K/decade
Summer .14 +- .02 K/decade
Fall .16 +- .03 K/decade

For a bit of nonsense ...

Winter in an area, like the midwestern US, with a substantial seasonal
cycle, is something like 40 K colder than summer. Winter's gaining
0.04 K/decade on summer, so in only 1000 decades, 10,000 years, winter
will be as warm as summer. Earlier in places with less seasonal cycle.

Less nonsensical ... one notes that this very crudely estimated 10 ky
is getting to milankovitch time scales, so that orbital variation, in
particular the changing tilt and date of vernal equinox (timing of seasons)
starts to become part of the story. Nothing especially new to this
observation, there's a decade-old paper by David Thomson that I recently
re-encountered which was making some observations regarding sun vs.
co2 and including orbital effects even for just the last century.

--
Robert Grumbine http://www.radix.net/~bobg/ Science faqs and amateur activities notes and links.
Sagredo (Galileo Galilei) "You present these recondite matters with too much
evidence and ease; this great facility makes them less appreciated than they
would be had they been presented in a more abstruse manner." Two New Sciences