Recent Global CO2 Trend

October 26:   415.73 ppm
October 25:   415.73 ppm
October 24:   415.72 ppm
October 23:   415.71 ppm
October 22:   415.71 ppm
Last Updated: October 27, 2021
Global CO2

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The figure shows daily averaged CO2 from four GML Baseline observatories; Barrow, Alaska (in blue), Mauna Loa, Hawaii (in red), American Samoa (in green), and South Pole, Antarctica (in yellow). The thick black lines represent the average of the smoothed seasonal curves and the smoothed, de-seasonalized curves for each of the records. These lines are a very good estimate of the global average levels of CO2. Details about how the smoothed seasonal cycle and trend are calculated from the daily data are available here.