Why is There a Net Flow of Carbon from the Atmosphere

Question

Why is there a net flow of carbon from the atmosphere to the oceans?
A) The lower concentration of carbon dioxide in the oceans compared to the atmosphere leads to carbon dioxide diffusing into the oceans.
B) Plankton at the surface funnel carbon from the atmosphere to the ocean.
C) Carbon dioxide dissolves more readily in water than in the atmosphere.
D) Respiration from aquatic life lowers the carbon dioxide concentration in the oceans.

Accepted Answer

The concentration of carbon dioxide is generally higher in the atmosphere than in the ocean, leading to diffusion of CO2 into the ocean to reach equilibrium.