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Physical Controls on Phytoplankton
Would you expect a fall bloom of phytoplankton? What would end it?
• What do phytoplankton need to grow?– Light– Nuitrients
• Where are Nutrients?
• Why?
• Where is the light?
• Where is the sun?
• So for phytoplankton to grow, nutrients must be brought to where the light is.
• Water must move up!
• How?
• Mixed layer cycle
• When bloom?
• When enough
light?
• When shallow
enough?
• Coastal Upwelling.
• Where is coastal upwelling important?
• What about the open ocean?
• What open ocean winds can drive upwelling?
• Results…
• What happens next?
• Iron Story…
• Iron Story -- winds carry dust. Atmosphere matters too!
• What happens after the Nutrients come up into the light?
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