Climate TrendsHome › Greenhouse gases › Carbon dioxide (CO₂)
Carbon dioxide (CO₂) in 2008 (global mean)
Annual mean385.02 ppm
vs previous year+2.12 ppm
Rank of increase18 / 46
Max − min within year3.99 ppm
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 385.23 ppm | +2.20 |
| Feb | 385.74 ppm | +2.20 |
| Mar | 386.15 ppm | +2.14 |
| Apr | 386.53 ppm | +2.26 |
| May | 386.49 ppm | +2.37 |
| Jun | 385.58 ppm | +2.32 |
| Jul | 384.10 ppm | +2.55 |
| Aug | 382.77 ppm | +2.47 |
| Sep | 382.54 ppm | +1.85 |
| Oct | 383.67 ppm | +1.57 |
| Nov | 385.18 ppm | +1.73 |
| Dec | 386.27 ppm | +1.81 |
+2.56 ppm
+1.81 ppm
+2.04 ppm
+2.17 ppm
+1.75 ppm
+2.12 ppm
+1.48 ppm
+2.26 ppm
+1.87 ppm
+2.03 ppm
+2.75 ppm
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.