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Trends in Atmospheric Carbon Dioxide
Monthly CO2 Average at Maunakea Observatories (NOAA Data Source)
August 2023: 419.68 ppm
August 2022: 417.15 ppm
Last updated: Sep 5, 2023


History of atmospheric carbon dioxide from 800,000 years ago until the end of the most recent GLOBALVIEW+ CO2 collection
Trends in Atmospheric Methane
Global CH4 Monthly Means (NOAA Data Source)
May 2023: 1922.26 ppb
May 2022: 1907.80 ppb
Last updated: Sep 5, 2023



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