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Trends in Atmospheric Carbon Dioxide
Monthly CO2 Average at Maunakea Observatories (NOAA Data Source)
January 2023: 419.47 ppm
January 2022: 418.19 ppm
Last updated: February 6, 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)
October 2022: 1920.34 ppb
October 2021: 1908.12 ppb
Last updated: January 5, 2023
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