Posted by Larry Hoover on February 5, 2009, at 8:45:29
In reply to Re: Global Warming or Cooling?????? » Phillipa, posted by Dinah on February 4, 2009, at 18:16:20
> I'm old enough to remember the new ice age of the seventies.
Yes, that prediction has never changed, really. Funny that I'm not seeing evidence for it.
Based on detailed analysis of climate data found in Greenland's and Antarctica's layered ice sheets, it has been surmised that the Sun's radiation varies over time in predictable cyclic patterns. If I recall correctly, there are three main cycles, each with different lengths of time between their peaks. For most of the time, their oscillations largely cancel each other out, but ever now and again (in geological time, not human time) these cycles have their peaks or troughs overlap, enhancing each other. Again, if I recall correctly, those cycles should be combining to reduce solar emissions now, and over the next few hundred (or was it thousand?) years.
As I said, it's interesting that nine of the ten warmest years on record have occurred after the ice age prediction was made.
Lar
poster:Larry Hoover
thread:877985
URL: http://www.dr-bob.org/babble/social/20090116/msgs/878185.html