Climate TrendsHome › Greenhouse gases › Carbon dioxide (CO₂)
Carbon dioxide (CO₂) in 1990 (global mean)
Annual mean354.06 ppm
vs previous year+1.27 ppm
Rank of increase40 / 46
Max − min within year3.93 ppm
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 354.48 ppm | +1.47 |
| Feb | 354.87 ppm | +1.41 |
| Mar | 355.20 ppm | +1.19 |
| Apr | 355.51 ppm | +1.13 |
| May | 355.41 ppm | +1.22 |
| Jun | 354.32 ppm | +1.05 |
| Jul | 352.70 ppm | +1.14 |
| Aug | 351.58 ppm | +1.37 |
| Sep | 351.79 ppm | +1.23 |
| Oct | 353.19 ppm | +1.34 |
| Nov | 354.45 ppm | +1.41 |
| Dec | 355.19 ppm | +1.28 |
+1.46 ppm
+1.43 ppm
+1.71 ppm
+2.48 ppm
+1.63 ppm
+1.27 ppm
+1.34 ppm
+0.70 ppm
+0.74 ppm
+1.49 ppm
+1.85 ppm
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.