Timeplot of global atmospheric methane (CH4) showing the full NOAA record (September 1983-March 2022). This version is created with a light background.
Trends in Athmospheric Methane by NOAA. The visualizations featured on this page utilize the complete record from the Globally averaged marine surface monthly mean data for the period July 1983-March 2022 (accessed: August 4, 2022). Within the data record the globally averaged monthly mean values are centered on the middle of each month and are represented in the visualization as the jagged/wavy Average line. The continuous line shows the long-term Trend, where the average seasonal cycle has been removed.
Please give credit for this item to: NASA's Scientific Visualization Studio
Science Paper: Dlugokencky, E. J., L. P. Steele, P. M. Lang and K. A. Masarie, (1994), The growth rate and distribution of atmospheric methane, Journal of Geophysical Research, 99, D8, 17, doi:10.1029/94JD01245
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NOAA Globall Averaged Marine Surface Monthly Mean Data
NOAA/GML, Ed Dlugokencky, gml.noaa.gov/ccgg/trends_ch4/