Midterm Exam Answers

Midterm Exam Answers - Carbon Cycle Midterm Exam April 1,...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Carbon Cycle Midterm Exam April 1, 2008 Answer Key 1. a. What process dominates the seasonal cycle in atmospheric O 2 at 41˚S? Southern summer release and southern winter uptake by the ocean. Part due to warming-cooling and part due to respiration. b. What is the principal reason why the atmospheric O 2 content declines at only 85 percent that expected from the consumption by fossil fuel burning? Excess photosynthesis over respiration plus forest and soil organic matter destruction in the Northern Hemisphere. (Note: Ocean O 2 release is secondary)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Why is the negative charge deficit a bit larger in the Pacific Ocean deep water than in tropical surface water? Ca removal (as CaCO 3 ) from surface water and Ca addition to deep water (CaCO 3 dissolution). b. Why is the carbonate ion contribution to satisfying the negative charge deficit larger in tropical surface water than in Pacific Ocean deep water? Photosynthesis in surface water and sinking of organic matter thus formed removes CO 2 and hence raises CO 3 2- . The reverse is due to respiration in deep water.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 10

Midterm Exam Answers - Carbon Cycle Midterm Exam April 1,...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online