What is the source of high carbon dioxide levels at middle depths in the ocean?

Question

Quizplus · Accepted Answer

Carbon dioxide levels in the middle depths of the ocean are higher than they are at the surface. Respiration from animals and the decay of the remains of organisms are the large contributors to these high levels of carbon dioxide. Information can be found in the section The Ocean's Acid-Base Balance Varies with Dissolved Components and Depth.

What Is the Source of High Carbon Dioxide Levels at Middle