In article
,
Weatherlawyer writes:
On Dec 13, 8:59 am, Paul Hyett wrote:

I can understand why low pressure cells are deeper in winter - greater
temperature contrast

So what causes greater temperature differences?


The temperature at the Equator doesn't change much throughout the year,
as the sun at local noon is always within 23 degrees or so of the
vertical, and the length of time between sunrise and sunset doesn't
change much either. But close to the Pole you have almost six months
with no sun, so naturally there is a large difference in temperature
between winter and summer. That produces a much greater temperature
difference between Polar and Equatorial regions in winter than in
summer.
--
John Hall
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