II.Response to
Perturbations
•Two new ice age hypotheses
• (THE ONGOING SAGA)
A.Southern Ocean
•HYPOTHESIS: reduced AABW influence
–Fertilization out/air-sea equilibration in
–Real ocean more like box models (high sensitivity) than GCMs (low sensitivity)
B. Low latitudes
•HYPOTHESIS: SAMW-SiO2/CaCO3 iron fertilization scenario
–fertilization in
–Real ocean more like GCMs (high sensitivity) than box models (low sensitivity)