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Methane (CH₄) in 1985 (global mean)
Annual mean1,657.4 ppb
vs previous year+12.4 ppb
Rank of increase5 / 41
Max − min within year20.7 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,655.6 ppb | +16.9 |
| Feb | 1,652.3 ppb | +13.5 |
| Mar | 1,654.6 ppb | +13.8 |
| Apr | 1,658.2 ppb | +14.2 |
| May | 1,655.9 ppb | +12.7 |
| Jun | 1,650.0 ppb | +10.3 |
| Jul | 1,646.8 ppb | +8.8 |
| Aug | 1,652.2 ppb | +10.5 |
| Sep | 1,662.5 ppb | +11.9 |
| Oct | 1,667.5 ppb | +12.9 |
| Nov | 1,666.8 ppb | +13.0 |
| Dec | 1,666.1 ppb | +9.8 |
+12.4 ppb
+12.8 ppb
+12.6 ppb
+10.5 ppb
+11.3 ppb
+9.9 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.