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Carbon dioxide (CO₂) in 2021 (global mean)
Annual mean414.70 ppm
vs previous year+2.26 ppm
Rank of increase15 / 46
Max − min within year4.45 ppm
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 414.73 ppm | +2.30 |
| Feb | 415.20 ppm | +2.25 |
| Mar | 415.49 ppm | +2.05 |
| Apr | 415.81 ppm | +1.95 |
| May | 416.01 ppm | +2.20 |
| Jun | 415.20 ppm | +2.32 |
| Jul | 413.45 ppm | +2.28 |
| Aug | 412.15 ppm | +2.41 |
| Sep | 412.38 ppm | +2.38 |
| Oct | 413.83 ppm | +2.17 |
| Nov | 415.58 ppm | +2.33 |
| Dec | 416.60 ppm | +2.46 |
+3.42 ppm
+2.15 ppm
+2.39 ppm
+2.46 ppm
+2.37 ppm
+2.26 ppm
+2.38 ppm
+2.27 ppm
+3.44 ppm
+2.83 ppm
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.