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Methane (CH₄) in 2003 (global mean)
Annual mean1,777.3 ppb
vs previous year+4.6 ppb
Rank of increase31 / 41
Max − min within year14.6 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,777.5 ppb | +3.4 |
| Feb | 1,774.8 ppb | +2.0 |
| Mar | 1,774.8 ppb | +1.4 |
| Apr | 1,775.8 ppb | +3.1 |
| May | 1,774.5 ppb | +4.2 |
| Jun | 1,771.7 ppb | +4.8 |
| Jul | 1,770.7 ppb | +6.4 |
| Aug | 1,774.3 ppb | +7.3 |
| Sep | 1,780.5 ppb | +6.8 |
| Oct | 1,784.7 ppb | +6.4 |
| Nov | 1,785.3 ppb | +5.8 |
| Dec | 1,783.6 ppb | +3.9 |
+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
+5.7 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.