Trends In Atmospheric CO2 Concentration
Trends in atmospheric CO2 at La Parguera (2009-present) and at the Mauna Loa Observatory, Hawaii (2005-present)
Monthly mean CO2 mole fraction determined from daily averages and expressed as parts per million (ppm).
Download the Mauna Loa CO2 monthly mean data.
More information: Pacific Marine Environmental Laboratory (PMEL) - La Parguera NOAA Coral Reef Early Warning System (CREWS)