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???faethor said:Okay. But the magentic change appears to have been on earth during this period. At least say some scientist's guesses -- they'll still researching this possibility.metalman said:The magnetic polarity of the sun reverses every 11 year cycle.
Not sure what you mean by this. I know that the earths field flips from time to time but it's on the order of 3 to 4 hundred thousand years or so, not like the sun's 11.
But the sunspot cycle is important though it doesn't necessarily dominate. Through the 70's and 80's when the cycle was high we still cooled a little and solar energy reaching the ground was actually lower than it should have been because of particulates especially sulphur particulates (from human activity - related to acid rain, also definitely shown to be mostly human). Since these were cleaned up we've been receiving more energy at the ground despite the falling sunspot activity. Lots of variables in this equation, and it's non-linear.