The table below shows the annual movement of carbon into and out of the atmosphere due to different global processes.
| Process | Direction of carbon movement | Mass of carbon transferred per year / gigatonnes |
|---|---|---|
| Photosynthesis | Out of the atmosphere | 122.4 |
| Respiration | Into the atmosphere | 120.2 |
| Ocean absorption | Out of the atmosphere | 91.5 |
| Ocean release | Into the atmosphere | 90.5 |
| Combustion of fossil fuels | Into the atmosphere | 9.8 |
Calculate the net mass of carbon added to the atmosphere each year.
