Trends in CO2, CH4, N2O, SF6
Trends in Atmospheric Carbon Dioxide (CO2)
Recent Global CO2 Trend
| May 27: | 425.86 ppm |
| May 26: | 425.86 ppm |
| May 25: | 425.85 ppm |
| May 24: | 425.84 ppm |
| May 23: | 425.83 ppm |
The figure shows daily averaged CO2 from four GML Atmospheric 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.