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The book “Ice Ages: Solving the Mystery”, first
published in the 1970’s, is a worthwhile historical review of our efforts
in understanding the mechanism of the ice ages, starting from the time that
people realized that great ice sheets explained geological formations better
than the Great Flood. In that sense, the central cause of global warming and cooling (the
Milankovitch cycles) has been generally accepted for decades, although there
are still arguments around some issues. For example, the insolation
changes are generally slight, so feedback mechanisms (i.e. albedo changes,
greenhouse gas release) are invoked to explain the observed changes. Although there is this underlying driver for the ice age cycles,
other disruptions are still possible. For example, large volcanic events
and comet/asteroid impacts are known to cause global disruptions, and they don’t
follow the orbital cycles. Time will tell if the rapid release of fossil carbon
that’s happening now will deserve similar merit. In any case, planetary physics is fascinating IMO. Mark (who actually does have fruit trees (alas, being neglected this
year), and tries to contribute positively to the AGW debate!) From:
nafex-bounces@lists.ibiblio.org [mailto:nafex-bounces@lists.ibiblio.org] On
Behalf Of Jwlehman@aol.com
http://www.digitaljournal.com/article/277236
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