Mauna Loa CO2

January 2024

 

NOAA-GML

SCRIPPS UCSD

January 2024
422.80 ppm TBD
January 2023 419.48 ppm TBD
January 2022 418.13 ppm TBD
Last Update: Feb. 5, 2024 Jan. 8, 2024
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.