Caption: "Schematic diagram of chemical and transport processes related to atmospheric composition. These processes link the atmosphere with other components of the Earth system, including the oceans, land, and terrestrial and marine plants and animals."

The cartoon illustrates the components of a scientific model of chemical and transport processes in the Earth's atmosphere. You could also say it is cartoon of those processes themselves.

Credit/Permission: United States Global Change Research Program (formally United States Climate Change Science Program), 2003 / Public domain.
Image link: Wikipedia.
File: Earth atmosphere file: atmosphere_model.html.