GML conducts research on greenhouse gas and carbon cycle feedbacks, changes in aerosols, and surface radiation, and recovery of stratospheric ozone.

Trends in CH4 - NOAA Global Monitoring Laboratory

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Here are the latest monthly-averaged observations of global methane (CH₄; a potent greenhouse gas)... April 2026 - 1937.59 ppb April 2025 - 1934.59 ppb + Data: gml.noaa.gov/ccgg/trends_... + More info on trends: doi.org/10.1126/scie...