
Appendix B. Equations
TABLE B-1 lists variables and constants used in the following equations.
TABLE B-1. Table of Equation Variables and Constants
CO
2
Mass Density
mg·m
-3
H
2
O Mass Density g·m
-3
Mass Density of Dry Air
g·m
-3
2
Molar Mixing Ratio
(concentration relative to dry air)
µmol·mol
-1
2
O Molar Mixing Ratio
(concentration relative to dry air)
mmol·mol
-1
Molecular Weight of CO
2
44 mg·mmol
-1
Molecular weight of dry air
0.029 g·mmol
-1
Molecular weight of H
2
O 0.018 g·mmol
-1
Universal Gas Constant 8.3143×10
–6
kPa·m
3
·K
-1
·mmol
-1
Enhancement Factor Arbitrary
Dew Point Temperature
o
C
Temporary variable for dew point
calculation
Arbitrary
Mass Density from Molar Mixing Ratios
( )
−
+
=
v
vcc
c
MTR
P
MX
ρ
ρ
15.27310
6
(B-1
1
)
( )(
)
v
vv
v
X
TR
PMX
++
=
100015.
273
ρ
(B-2
1
)
(B-3)
( )
15.273
1000
+
+
−
=
TR
M
X
PX
P
d
v
v
d
ρ
(B-4)
B-1
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