implying that for a given amount of solar radiation on Daisyworld there are two
stable temperatures and two stable daisy population sizes. How can this finding be
reconciled with the notion of Gaia’s stability?
44.2 Daisyworld Model Equations
DARK_DAISY_AREA(t) ¼ DARK_DAISY_AREA(t À dt) + (DARK_DAISY_
BIRTH À DARK_DAISY_DEATH) * dt
INIT DARK_DAISY_AREA ¼ 0.0001
INFLOWS:
DARK_DAISY_BIRTH ¼ if ((DARK_DAISY_TEMP>5) and (DARK_DAISY_
TEMP<45))
then
DARK_DAISY_AREA * NO_DAISY_AREA * DARK_
DAISY_GROWTH else 0
OUTFLOWS:
DARK_DAISY_DEATH ¼ DARK_DAISY_AREA * DEATH_RATE
LIGHT_DAISY_AREA(t) ¼ LIGHT_DAISY_AREA(t À dt) + (LIGHT_DAISY_
BIRTH À LIGHT_DAISY_DEATH) * dt
INIT LIGHT_DAISY_AREA ¼ 0.0001
INFLOWS:
LIGHT_DAISY_BIRTH ¼
if ((LIGHT_DAISY_TEMP>5) and (LIGHT_
DAISY_TEMP<45))
then
LIGHT_DAISY_AREA * NO_DAISY_AREA
* LIGHT_DAISY_GROWTH else 0
Fig. 44.14
422
44 Daisyworld