Campbell IRGASON Manuel télécharger pdf (Page 57)

Appendix B. Equations

Table B-1 lists variables and constants used in the following equations.

TABLE B-1. Table of Equation Variables and Constants

Variable or Constant Description Units

Mass Density

mg·m

-3

O Mass Density

g·m

-3

Mass Density of Dry Air

g·m

-3

Molar Mixing Ratio

(concentration relative to dry air)

µmol·mol

-1

O Molar Mixing Ratio

(concentration relative to dry air)

mmol·mol

-1

Molecular Weight of CO

44 mg·mmol

-1

Molecular weight of dry air

0.029 g·mmol

-1

Molecular weight of H

0.018 g·mmol

-1

Ambient Pressure kPa

Universal Gas Constant

8.3143 x 10

-6

kPa·m

·K

-1

·mmol

-1

Ambient Temperature

Vapor Pressure kPa

Enhancement Factor Arbitrary

Dew Point Temperature

tmpd

Temporary variable for dew point

calculation

Arbitrary

Mass Density from Molar Mixing Ratios

()

⎟

⎠

⎞

⎜

⎝

⎛

−

vcc

MTR

15.27310

(B-1

)

()()

XTR

PMX

100015.273

(B-2

)

(

)

()

15.273+

−

MeP

(B-3)

()

15.273

1000

⎟

⎠

⎞

⎜

⎝

⎛

−

(B-4)

B-1

1 2 ... 52 53 54 55 56 57 58 59

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Campbell IRGASON Manuel Page 57

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