Carbon Dioxide and the Ocean
1. Introduction

Expedition Menu
1. Introduction
2. Dead Zones
4. CO2 and Ocean

5. Ocean Acidification
6. The History

7. Iron Expedition
8. Departure
9. To the Study Site
10. Iron Mixture
11. Fertilization
12. Sampling
13. Lab Work
14. Tracking the Patch
15. Trapping Particles
16. The Results
17. Recent Work
18. Going Rogue

Don's Introduction
Many materials pertaining to the SOFeX expedition were used by the permission of the Moss Landing Marine Laboratories. We thank Dr. Kenneth Coale for allowing the use of these materials.


Chorethron centric diatom from South Patch (bar is 100 micrometers)
(credit: Karen Selph-University of Hawaii)


Welcome back!

We will now look at phytoplankton in dead zones, harmful algal blooms and the role of phytoplankton in absorbing carbon dioxide and influence climate.

We will next join the SOFeX to test the "iron hypothesis" -- an intriguing speculation on engineering climate change by stimulating phytoplankton blooms.

Learning Objective: Students will learn about the role played by microscopic organisms, phytoplankon, in the health of the ocean and global climate, in general. Next, students will learn about the potential of the disposal of carbon dioxide, CO2, in the deep waters of the ocean. Students will then join a virtual research voyage to the Southern Ocean to study the effects of iron fertilization on phytoplankton populations and its relationship to the carbon cycle and carbon dioxide accumulation in the atmosphere. Finally, in a required discussion, students will use their multiple choce questions to assess the scientific and ethical merits of geoengineering the ocean to address either nutrient loading and dead zones, harmfuls algal blooms, ocean acidification or iron fertilzation in combination with the acculmulation of carbon dioxide in the atmosphere,.


The importance of single-celled organisms!

Images from Diatoms of the California Current System

Contact Don Reed
Dept. of Geology
San José State University
ęCopyright 2007
Last Updated on April 4, 2007

What is a dead zone in the ocean?