Climate TrendsHome › Greenhouse gases › Carbon dioxide (CO₂)
Carbon dioxide (CO₂) in 2012 (global mean)
Annual mean392.65 ppm
vs previous year+2.03 ppm
Rank of increase22 / 46
Max − min within year4.50 ppm
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 392.61 ppm | +1.76 |
| Feb | 393.20 ppm | +1.91 |
| Mar | 393.72 ppm | +2.06 |
| Apr | 393.99 ppm | +1.94 |
| May | 393.88 ppm | +1.80 |
| Jun | 392.84 ppm | +1.70 |
| Jul | 391.00 ppm | +1.80 |
| Aug | 389.89 ppm | +2.02 |
| Sep | 390.55 ppm | +2.28 |
| Oct | 392.16 ppm | +2.33 |
| Nov | 393.56 ppm | +2.36 |
| Dec | 394.39 ppm | +2.37 |
+1.75 ppm
+2.12 ppm
+1.48 ppm
+2.26 ppm
+1.87 ppm
+2.03 ppm
+2.75 ppm
+1.95 ppm
+2.31 ppm
+3.42 ppm
+2.15 ppm
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.