Wrangel Island Mammoths 'not killed by inbreeding'
Posted 24 March 2012 - 10:35
Posted 24 March 2012 - 20:27
Posted 24 March 2012 - 20:33
Now that is news, a shift in axial tilt? Every indication is the tilt does not change only the position of the axis and that change is primarily due to gravitational progression related to our diminitive twin, Luna...
You're thinking of 'nutation' David, the axial tilt is 'obliquity' and varies between 24.5o and 22.1o over a 41,000yr period (currently decreasing). As Andy says, it's one of the Milankovitch cycles.
Heads up on the string of supercells to your west mate.
Posted 25 March 2012 - 04:53
Thanx, I forgot the slight wobble... (Though as to a global (GAT) influence it may at best account for roughly +/-0.15C.)
(As to the pounding, heavy rain squall @ 7-9cm/hr for 20 min. Brief sleet (small hail, roughly thimble tip), with 40km gusts. And the main energy missed us as it split/lifted to clear the Cane Mts, well the "Cane Rise" would be more accurate, to our immediate SSW. So we dodged the worst.., Thanx!)