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Methane (CH₄) in 2013 (global mean)
Annual mean1,813.5 ppb
vs previous year+5.3 ppb
Rank of increase29 / 41
Max − min within year14.4 ppb
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 1,814.0 ppb | +6.8 |
| Feb | 1,814.2 ppb | +6.0 |
| Mar | 1,813.2 ppb | +3.3 |
| Apr | 1,812.8 ppb | +4.3 |
| May | 1,812.0 ppb | +7.1 |
| Jun | 1,808.6 ppb | +7.6 |
| Jul | 1,806.0 ppb | +6.6 |
| Aug | 1,808.5 ppb | +5.3 |
| Sep | 1,814.2 ppb | +4.1 |
| Oct | 1,818.5 ppb | +3.7 |
| Nov | 1,820.3 ppb | +4.4 |
| Dec | 1,819.3 ppb | +4.8 |
+5.7 ppb
+6.5 ppb
+5.4 ppb
+4.1 ppb
+5.1 ppb
+5.3 ppb
+9.2 ppb
+11.6 ppb
+9.0 ppb
+6.4 ppb
+7.8 ppb
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.