Weekly means for atmospheric CO2 originate from the NOAA Global Monitoring Laboratory (GML) and its Mauna Loa Observatory in Hawaii. 

Latest average weekly CO2 level in the atmosphere

A full-size version of this graphic is available for print media and digital screens.

NOAA source data: Web & txt


NOAA-ESRL and Scripps CO2 provide continually-updated graphics with daily and weekly data points plotted over multiple time periods.  Use the tabs below to view these graphics as well as links to the NOAA and Scripps websites.  The CO2 Earth Records page tracks the latest weekly record-high CO2 levels

Recent data is preliminary.  NOAA-ESRL is the only weekly dataset with values updated in real time.  Scripps CO2 posts a weekly CO2 dataset that is updated less frequently.