Recent Global CO2 Trend

January 16:   411.55 ppm
January 15:   411.54 ppm
January 14:   411.53 ppm
January 13:   411.53 ppm
January 12:   411.52 ppm
Last Updated: January 17, 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.