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Atmospheric Greenhouse Gases
Trends in Atmospheric Carbon Dioxide
Monthly CO2 Average  (NOAA Data Source)

March 2024:  425.38 ppm

March 2023:  420.99 ppm

Last updated: Apr 5, 2024

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History of atmospheric carbon dioxide from 800,000 years ago until the end of the most recent GLOBALVIEW+ CO2 collection

Source: NOAA Global Monitoring Laboratory

Trends in Atmospheric Methane
Global CH4 Monthly Means   (NOAA Data Source)

December 2023:  1932.23 ppb

December 2022:  1924.61 ppb

Last updated: Apr 5, 2024

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