Website which shows monthly trends in atmospheric greenhouse gases, including methane (CH4). The Global Monitoring Division of NOAA’s Earth System Research Laboratory has measured methane since 1983 at a globally distributed network of air sampling sites. A global average is constructed by first smoothing the data for each site as a function of time, and then smoothed values for each site are plotted as a function of latitude for 48 equal time steps per year. Global means are calculated from the latitude plot at each time step.
Global monitoring laboratory
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Global
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Resource Type
Data
Category
Methane fundamentals
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