ESS101C
Prof. Jin-Yi Yu
How Glaciations Increased Productions at Low Latitudes?
qIncreased Upwelling
q      Stronger glacial winds
ègreater wind-driven upwelling of nutrient-rich water along coast and near equator.
qIncreased Nutrient Levels By Iron Fertilization
q      Stronger glacial winds
èDust rich in iron is blow to the ocean from arid continental interiors
èIons fertilize the surface ocean and stimulate greater glacial photosynthesis and productivity.
èThis fertilization effect stimulates the productivity in mid-ocean regions far from costal upwelling.
q     
q
(from Earth’s Climate: Past and Future)