Mauna Loa CO2

February 2016




February 2017

 406.42 ppm

406.64 ppm

February 2016

 404.04 ppm

404.16 ppm

February 2015

400.28 ppm

400.31 ppm

Last Update: March 6, 2017
March 4, 2017
View Data: NOAA  |  CO2.Earth 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

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



CO2 Past.  CO2 Present.  CO2 Future.