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Methane (CH₄) in 1984 (global mean)
Annual mean1,645.0 ppb
vs previous year–
Rank of increase–
Max − min within year18.2 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,638.7 ppb | – |
| Feb | 1,638.8 ppb | – |
| Mar | 1,640.9 ppb | – |
| Apr | 1,644.0 ppb | – |
| May | 1,643.2 ppb | – |
| Jun | 1,639.7 ppb | – |
| Jul | 1,638.0 ppb | +12.0 |
| Aug | 1,641.7 ppb | +13.7 |
| Sep | 1,650.6 ppb | +12.2 |
| Oct | 1,654.6 ppb | +9.8 |
| Nov | 1,653.8 ppb | +11.2 |
| Dec | 1,656.2 ppb | +16.7 |
+12.4 ppb
+12.8 ppb
+12.6 ppb
+10.5 ppb
+11.3 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.