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Nitrous oxide (N₂O) in 2009 (global mean)
Annual mean322.28 ppb
vs previous year+0.77 ppb
Rank of increase19 / 24
Max − min within year0.90 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 322.21 ppb | +0.88 |
| Feb | 322.34 ppb | +0.95 |
| Mar | 322.26 ppb | +0.88 |
| Apr | 322.10 ppb | +0.71 |
| May | 321.98 ppb | +0.55 |
| Jun | 321.94 ppb | +0.48 |
| Jul | 322.02 ppb | +0.59 |
| Aug | 322.15 ppb | +0.75 |
| Sep | 322.30 ppb | +0.81 |
| Oct | 322.51 ppb | +0.86 |
| Nov | 322.71 ppb | +0.91 |
| Dec | 322.84 ppb | +0.87 |
+0.63 ppb
+0.66 ppb
+0.91 ppb
+0.62 ppb
+1.06 ppb
+0.77 ppb
+0.91 ppb
+1.02 ppb
+0.84 ppb
+0.89 ppb
+1.15 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.