Recent Global CO2 Trend

January 27:   411.67 ppm
January 26:   411.66 ppm
January 25:   411.65 ppm
January 24:   411.64 ppm
January 23:   411.64 ppm
Last Updated: January 28, 2020
Global CO2

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The figure shows daily averaged CO2 from four GMD 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.