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Methane (CH₄) in 2008 (global mean)
Annual mean1,787.1 ppb
vs previous year+5.7 ppb
Rank of increase26 / 41
Max − min within year19.7 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,786.7 ppb | +7.5 |
| Feb | 1,785.8 ppb | +7.2 |
| Mar | 1,786.2 ppb | +6.0 |
| Apr | 1,786.9 ppb | +5.9 |
| May | 1,785.2 ppb | +5.9 |
| Jun | 1,780.4 ppb | +5.0 |
| Jul | 1,777.6 ppb | +4.9 |
| Aug | 1,781.1 ppb | +3.7 |
| Sep | 1,787.6 ppb | +1.8 |
| Oct | 1,793.7 ppb | +4.0 |
| Nov | 1,797.3 ppb | +8.0 |
| Dec | 1,796.6 ppb | +8.5 |
+4.6 ppb
-0.2 ppb
-2.8 ppb
+0.7 ppb
+6.4 ppb
+5.7 ppb
+6.5 ppb
+5.4 ppb
+4.1 ppb
+5.1 ppb
+5.3 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.