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Sulfur hexafluoride (SF₆) in 1998 (global mean)
Annual mean4.21 ppt
vs previous year–
Rank of increase–
Max − min within year0.20 ppt
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 4.11 ppt | – |
| Feb | 4.13 ppt | – |
| Mar | 4.15 ppt | – |
| Apr | 4.18 ppt | – |
| May | 4.19 ppt | – |
| Jun | 4.20 ppt | – |
| Jul | 4.21 ppt | +0.21 |
| Aug | 4.22 ppt | +0.22 |
| Sep | 4.24 ppt | +0.22 |
| Oct | 4.27 ppt | +0.22 |
| Nov | 4.29 ppt | +0.21 |
| Dec | 4.31 ppt | +0.21 |
+0.18 ppt
+0.20 ppt
+0.19 ppt
+0.20 ppt
+0.25 ppt
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.