Environmental Engineering Reference
In-Depth Information
Figure 3.1
Temperature structure and subdivisions of the
atmosphere and ocean.
Table 3.1 Atmospheric composition of the dry
atmosphere below
20 km
Gas
Chemical symbol
Volume % (dry air)
Nitrogen
N2
78·08
Oxygen
O
2
20·95
Argon
Ar
0·93
Carbon dioxide
CO
2
0·037
Neon
Ne
0·0018
Krypton
Kr
0·0011
Helium
He
0·0005
Methane
CH
4
0·00017
Ozone
O
3
0·00006
