If they are, then the most significant dynamic influence would be our
nearest neighbour, the moon. Which of course it is.
I've just finished reading a book called " Predicting the Weather by
looking at the Moon" by Ken Ring, who patiently describes the mechanism
involved. It's worth reading.
The most obvious gravitational connections to
our atmosphere relate to phase, declination, perigee and apogee, and the
longer term cycles these generate.
If anyone's interested, have a look at his page on
http://www.weatherman.co.nz
Stuart
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