daisyworld & feedback effects kump chapter 2 tark hamilton
TRANSCRIPT
Average Climate Response of the 5 Largest Volcanic Eruptions (1883-1991)
Krakatau (1883), Santa Maria (1902), Agung (1963), El Chichón (1982), Pinatubo (1991)
Mt. Pinatubo Luzon, Philippines
June 12, 1991-3days VEI=6 Event
10 km3 of tephra 20 Mtons of SO2
-0.5°C coolingO3 depletion
SO2 Aerosols block sunlight
Arc Volcanoes with subducted or sediment contamination are worst
Designing Graphs: Data Display (measurements points, details) versus
Concepts (general trends)(both are auto-scaled to show the range of variation)
Daily Temperature Variation
Two Forcing Functions: Surface
Temperature on Daisies (Curve) vs Daisys on Surface Temperature
(line)
& Equilibrium Diagram: P1 stable versus P2 unstable
Increasing Solar Luminosity Shifts Equilibria, while White Daisys still
reflect heat the same way: i.e. Just different stable %
coverage
Response of Daisyworld to Luminosity
ΔTeq = ΔT0 + ΔTf
Where: ΔT0 w/o feedback
ΔTeq < ΔT0
and ΔTf < 0
a) Daisyworld’s response to Increased
Luminosity (neg. feedback on T°C)
b) Lifeless Planet with fixed albedo