Figure 2.4

This figure appears in chapter 2 of the Our Changing Planet: The U.S. Global Change Research Program for Fiscal Year 2017 report.

https://www.eol.ucar.edu/field_projects/pecan

As part of the Megacities Carbon Project, sensors located around the Los Angeles basin provide continuous ground-based measurements of the atmospheric concentrations of carbon dioxide, methane, and carbon monoxide. Remote-sensing instruments on Mt. Wilson and at Caltech provide measurements throughout the height of the atmosphere. Aircraft and mobile laboratories also provide infrequent but intensive measurements throughout the height of the atmosphere. (Source: NASA-Jet Propulsion Laboratory).

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