Linked Datasets 

CO2 1800-1960 Historical References, Chemical Methods. PDF file.
CO2 background estimation 1826-2008. Excel file.
CO2 1800-1960 raw monthly averages and reconstructed annual MBL averages. PDF file.
CO2 Sampling Stations – Chemical Methods 1800-1960. PDF file.
CO2 background estimation 1826-1960. Excel file.