Earth's Atmosphere (data)

Earth atmosphere composition

5.1E+18 kg - Total mass of Earth’s atmosphere (dry basis; average 1% H2O additional mass)

Analysis (mole fraction)
78.08% nitrogen (N2)
20.95% oxygen (O2)
9340 ppm argon (Ar) (10,000 ppm = 1%)
415 ppm carbon dioxide (CO2)*
18.2 ppm neon (Ne)
5.2 ppm helium (He)
1.7 ppm methane (CH4)

*419 ppm May 2021; annual increase 2.13 ppm/year


(https://research.noaa.gov/Portals/0/EasyGalleryImages/1/864/co2_data_mlo.png) Keeling Curve

​​Atmospheric mass of carbon dioxide per 1 ppm
= 5.1E+18 kg x ( 1E-06 ) x (1 tonne / 1000 kg)
= 5.1 E+09 tonne CO2 / 1 ppm CO2 = 5.1 Gt CO2 / 1 ppm CO2