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Methane (CH₄) in 1993 (global mean)
Annual mean1,736.5 ppb
vs previous year+1.1 ppb
Rank of increase36 / 41
Max − min within year17.2 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,735.8 ppb | -3.1 |
| Feb | 1,734.4 ppb | -3.0 |
| Mar | 1,735.4 ppb | -1.4 |
| Apr | 1,736.6 ppb | -0.1 |
| May | 1,735.0 ppb | -0.0 |
| Jun | 1,730.9 ppb | -0.7 |
| Jul | 1,728.0 ppb | -0.8 |
| Aug | 1,731.2 ppb | +0.8 |
| Sep | 1,738.4 ppb | +3.9 |
| Oct | 1,743.4 ppb | +5.7 |
| Nov | 1,745.2 ppb | +6.0 |
| Dec | 1,744.3 ppb | +5.8 |
+10.5 ppb
+11.3 ppb
+9.9 ppb
+10.4 ppb
+10.5 ppb
+1.1 ppb
+5.6 ppb
+6.7 ppb
+2.4 ppb
+3.3 ppb
+11.1 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.