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Methane (CH₄) in 2009 (global mean)
Annual mean1,793.5 ppb
vs previous year+6.5 ppb
Rank of increase23 / 41
Max − min within year13.0 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,795.0 ppb | +8.3 |
| Feb | 1,795.5 ppb | +9.6 |
| Mar | 1,795.8 ppb | +9.7 |
| Apr | 1,795.5 ppb | +8.6 |
| May | 1,792.4 ppb | +7.2 |
| Jun | 1,787.0 ppb | +6.5 |
| Jul | 1,785.0 ppb | +7.4 |
| Aug | 1,788.9 ppb | +7.9 |
| Sep | 1,794.8 ppb | +7.2 |
| Oct | 1,798.0 ppb | +4.3 |
| Nov | 1,797.9 ppb | +0.5 |
| Dec | 1,796.7 ppb | +0.2 |
-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
+9.2 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.