Figure : copy_of_global-monthly-mean-methane-and-carbon-dioxide-concentrations-and-global-annual-emissions-of-ch4-and-non-fossil-fuel-annual-emissions-of-co2-

ES.4. Global Monthly Mean Atmospheric Methane and Carbon Dioxide Concentrations

Figure ES.4

National Oceanic and Atmospheric Administration
Andrew R. Jacobson

This figure appears in chapter ES of the Second State of the Carbon Cycle Report (SOCCR2): A Sustained Assessment Report report.

CH4 values (red) and CO2 values (blue) are averaged from the background surface sites of the National Oceanic and Atmospheric Administration’s global monitoring network. Dotted vertical lines in 2007 and 2016 represent approximate reference times for publication of the First State of the Carbon Cycle Report (CCSP 2007) and development of the Second State of the Carbon Cycle Report. Concentrations of CH4 in parts per billion (ppb), CO2 in parts per million (ppm). [Simplified from Figure 8.1 in Ch. 8: Observations of Atmospheric Carbon Dioxide and Methane, p. 339.]

Figure may be copyright protected and permission may be required. Contact original figure source for information

The time range for this figure is January 01, 1979 (00:00 AM) to January 01, 2016 (00:00 AM).

This figure was created on May 03, 2018.

This figure was submitted on February 11, 2019.

This figure is composed of this image :
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