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Methane (CH₄) in 2011 (global mean)
Annual mean1,803.1 ppb
vs previous year+4.1 ppb
Rank of increase32 / 41
Max − min within year16.4 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,800.0 ppb | +2.6 |
| Feb | 1,799.9 ppb | +1.0 |
| Mar | 1,800.9 ppb | +1.5 |
| Apr | 1,802.8 ppb | +3.2 |
| May | 1,803.1 ppb | +5.5 |
| Jun | 1,798.9 ppb | +6.5 |
| Jul | 1,796.0 ppb | +6.7 |
| Aug | 1,799.0 ppb | +5.0 |
| Sep | 1,804.2 ppb | +2.2 |
| Oct | 1,809.6 ppb | +2.9 |
| Nov | 1,812.4 ppb | +5.3 |
| Dec | 1,810.1 ppb | +6.8 |
+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
+11.6 ppb
+9.0 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.