Modeling the Atmospheric Rise of Carbon Dioxide

White dome of the Mauna Loa Observatory, with the Mauna Kea mountain in the background
The Mauna Loa Observatory in Hawaii, where atmotpheric carbon dioxide levels have been measured and recorded sincer 1958. National Oceanic and Atmospheric Administration.
Here’s the data in its entirety. CO₂ is measured in ppm (parts-per-million). Hover over the plot for more details.
There’s a clear and consistent upward trend through the years. The average increase is +0.4% each year.
In fact, the regression line curves upward. This means that CO₂ levels are not only increasing but also accelerating at an alarming rate.
There are yearly peaks during winter months, when we burn more coal for energy, and plants naturally release more CO₂ when there is less sunlight.
Each circle corresponds to a full year. Here's what the data for 1958 looks like.
And here is the whole dataset. Notice the gradual trend outward, indicating a yearly increase in CO₂ levels.
The circles stretch outward in winter months (blue) and inward in summer months (red), due to the yearly cycles we saw above.