Mauna Loa CO2

November 2022




November 2022
417.51 ppm pending
November 2021 415.01 ppm pending
November 2020 413.12 ppm pending
Last Update: Dec. 5, 2022 TBD
View Data: NOAA Scripps

Mauna Loa Observatory (MLO)  |  Atmospheric CO2
monthly mean concentrations  |  ppm = parts per million

Two independent records of CO2 changes are maintained in parallel at Mauna Loa.   A graph showing the two records together is available at the bottom of the Scripps CO2 Program website.  All-time monthly record highs for CO2 are recorded at the CO2 Records webpage. 

Use the tabs below to view the latest monthly CO2 data, charts and related links.