Seasonal Insolation Changes
						q The 23,000-year cycle of precissional change dominants the insolation changes at low and middle latitudes. q The 41,000-year cycle of tilt change dominants the insolation changes at higher latitudes. q Eccentricity changes (the 1000,000 or 413,000-year cycles) is not a significant influence on seasonal insolation chanes.
			Mean isolation value = 340 W/m2