Started in March 1958, the Scripps Mauna Loa dataset is the longest-runing, high-precision instrument record for atmospheric CO2.
About the Scripps CO2 Program
The Scripps CO2 program was initiated in 1956 by Charles David Keeling who directed the program until he died in 2005. The program is now operated by Ralph F. Keeling who also runs the Scripps O2 Program that measures atmospheric oxygen and argon. Both programs are based at the Scripps Institution of Oceanography in San Diego (La Jolla) California.
CO2Now.org moved to CO2.earth in November 2015. Go to the CO2.earth's monthly CO2 page to get the latest Scrips readings and dataset for CO2 at Mauna Loa.
Scripps CO2 Program Home Page | Scripps CO2 Program
Scripps CO2 Program: Scripps Source CO2 Data (CSV)
More from the Scripps CO2 Program
Keeling Curve Website | See the most recent daily average for atmospheric CO2
Keeling Curve Twitter | Daily averages for atmospheric CO2 (recent and historical)
NOAA CO2 Data | CO2Now.org