I agree, Marc. While there are theories, our present knowledge of solar physics provides no solid ground for predicting what may or may not be happening. Extrapolating empirical observations taken over the past few hundred years is risky, since they literally represent a quark in the bucket with respect to the sun's lifetime:
http://en.wikipedia.org/wiki/File:Sunspot_Numbers.png Longer reconstructions based on geologic evidence indicate that there's more at work than a simple 11-year cycle with sporadic "minimums": http://en.wikipedia.org/wiki/File:Sunspots_11000_years.svg How 'bout that peak at 9000 BC? 73, Dave, AA6YQ -----Original Message----- From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com]on Behalf Of Marc PD4U Sent: Friday, May 01, 2009 11:36 AM To: digitalradio@yahoogroups.com Subject: [digitalradio] Re:Solar Cycle 23 Sunspot Group Re-emerges But is the solar minimum the (only necessary and sufficient) explaining factor for a global cooling? As we say in Holland "One swallow doesn't make it summer" meaning: one cannot 'jump to conclusions' based on unsufficient data, and beside that the swallow is not the explaining factor for summer to arise, but a result of it. ---------------------------------------------------------------------------- ---- Express yourself instantly with MSN Messenger! MSN Messenger
