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Methane (CH₄) in 2004 (global mean)
Annual mean1,777.1 ppb
vs previous year-0.2 ppb
Rank of increase39 / 41
Max − min within year12.9 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,780.8 ppb | +3.3 |
| Feb | 1,779.8 ppb | +4.9 |
| Mar | 1,781.0 ppb | +6.1 |
| Apr | 1,780.9 ppb | +5.1 |
| May | 1,777.7 ppb | +3.3 |
| Jun | 1,772.4 ppb | +0.8 |
| Jul | 1,768.1 ppb | -2.6 |
| Aug | 1,769.9 ppb | -4.4 |
| Sep | 1,775.8 ppb | -4.7 |
| Oct | 1,780.1 ppb | -4.6 |
| Nov | 1,780.6 ppb | -4.7 |
| Dec | 1,778.2 ppb | -5.4 |
+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
+5.7 ppb
+6.5 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.