1. Physical Controls on Phytoplankton Would you expect a fall bloom of phytoplankton? What would end it?

2. What do phytoplankton need to grow? –Light –Nuitrients

3. Where are Nutrients?

4. Why?

5. 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?

6. Mixed layer cycle

7. When bloom? When enough light? When shallow enough?

9. Coastal Upwelling.

10. Where is coastal upwelling important?

13. What about the open ocean?

14. What open ocean winds can drive upwelling?

15. Results…

16. What happens next?

17. Iron Story…

18. Iron Story -- winds carry dust. Atmosphere matters too!

23. What happens after the Nutrients come up into the light?