|Since 1993, these 12 small-scale open ocean experiments (red dots) have shown that iron additions do indeed result in phytoplankton blooms, thereby drawing carbon dioxide out of the atmosphere and into the ocean.|
- How long will carbon be sequestered in the ocean?
- How deep is deep enough to accomplish this?
- How can sequestration efficiency be increased?
- How does the ocean food web change during and after a bloom?
- Which phytoplankton and grazers raise sequestration efficiency?
- Which parts of the ocean are best for iron fertilization?
- What size and what shaped patch should be fertilized?
- How often and how continually should iron be added?
- What kinds of currents and surface conditions give the best results?
- How can the amount and fate of carbon from a bloom be verified?
- How could effects downstream of experiments be detected?
- How could the production of other greenhouse gases be monitored?