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Carbon dioxide (CO₂) in 2013 (global mean)
Annual mean395.40 ppm
vs previous year+2.75 ppm
Rank of increase4 / 46
Max − min within year3.66 ppm
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 395.07 ppm | +2.46 |
| Feb | 395.69 ppm | +2.49 |
| Mar | 396.28 ppm | +2.56 |
| Apr | 396.74 ppm | +2.75 |
| May | 396.75 ppm | +2.87 |
| Jun | 395.96 ppm | +3.12 |
| Jul | 394.48 ppm | +3.48 |
| Aug | 393.24 ppm | +3.35 |
| Sep | 393.21 ppm | +2.66 |
| Oct | 394.50 ppm | +2.34 |
| Nov | 395.96 ppm | +2.40 |
| Dec | 396.87 ppm | +2.48 |
+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
+2.39 ppm
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.