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Methane (CH₄) in 2000 (global mean)
Annual mean1,773.2 ppb
vs previous year+0.9 ppb
Rank of increase37 / 41
Max − min within year14.3 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,775.5 ppb | +1.7 |
| Feb | 1,775.4 ppb | +1.6 |
| Mar | 1,776.5 ppb | +1.9 |
| Apr | 1,777.2 ppb | +2.3 |
| May | 1,774.6 ppb | +1.9 |
| Jun | 1,768.1 ppb | +0.8 |
| Jul | 1,763.5 ppb | +0.5 |
| Aug | 1,765.5 ppb | +0.8 |
| Sep | 1,772.0 ppb | +1.0 |
| Oct | 1,777.1 ppb | +0.5 |
| Nov | 1,777.7 ppb | -0.8 |
| Dec | 1,775.3 ppb | -1.9 |
+6.7 ppb
+2.4 ppb
+3.3 ppb
+11.1 ppb
+6.7 ppb
+0.9 ppb
-1.9 ppb
+1.4 ppb
+4.6 ppb
-0.2 ppb
-2.8 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.