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Trends In Atmospheric CO2 Concentration

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).

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)