ESS200A
Prof. Jin-Yi Yu
Seasonal Insolation Changes
qThe 23,000-year cycle of precissional change dominants the insolation changes at low and middle latitudes.
qThe 41,000-year cycle of tilt change dominants the insolation changes at higher latitudes.
qEccentricity changes (the 1000,000 or 413,000-year cycles) is not a significant influence on seasonal insolation chanes.
Mean isolation
value = 340 W/m2
(from Earth’s Climate: Past and Future)