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Nitrous oxide (N₂O) in 2021 (global mean)
Annual mean334.28 ppb
vs previous year+1.28 ppb
Rank of increase2 / 24
Max − min within year1.16 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 333.88 ppb | +1.38 |
| Feb | 333.96 ppb | +1.41 |
| Mar | 334.01 ppb | +1.40 |
| Apr | 334.06 ppb | +1.37 |
| May | 334.10 ppb | +1.33 |
| Jun | 334.13 ppb | +1.26 |
| Jul | 334.15 ppb | +1.16 |
| Aug | 334.23 ppb | +1.12 |
| Sep | 334.40 ppb | +1.16 |
| Oct | 334.62 ppb | +1.21 |
| Nov | 334.84 ppb | +1.23 |
| Dec | 335.04 ppb | +1.28 |
+0.78 ppb
+0.79 ppb
+1.17 ppb
+0.96 ppb
+1.13 ppb
+1.28 ppb
+1.34 ppb
+1.07 ppb
+1.03 ppb
+1.14 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.