Trends In Atmospheric CO2 Concentration
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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)