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Methane (CH₄) in 2002 (global mean)
Annual mean1,772.7 ppb
vs previous year+1.4 ppb
Rank of increase35 / 41
Max − min within year15.4 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,774.1 ppb | +1.2 |
| Feb | 1,772.9 ppb | +0.3 |
| Mar | 1,773.4 ppb | -0.2 |
| Apr | 1,772.7 ppb | -1.1 |
| May | 1,770.3 ppb | -0.6 |
| Jun | 1,766.9 ppb | +0.8 |
| Jul | 1,764.3 ppb | +1.2 |
| Aug | 1,767.0 ppb | +2.5 |
| Sep | 1,773.8 ppb | +3.3 |
| Oct | 1,778.2 ppb | +2.8 |
| Nov | 1,779.5 ppb | +2.9 |
| Dec | 1,779.6 ppb | +3.7 |
+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
+0.7 ppb
+6.4 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.