Virtual temperature

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The virtual temperature (Tv) of an air parcel is the temperature that dry air would have if its pressure and density were equal to those of a sample of moist air. [1] The virtual temperature allows the use of the dry-air equation of state for moist air, except with T replaced by Tv.[2] A formula for the virtual temperature Tv is

{T_v} = \frac{T}{1-\frac{e}{p}(1-\varepsilon)}\, ,

where T is the ambient temperature, e is the partial pressure of the variable gas, p is the pressure, and ε is the molar mass ratio of the variable gas to the dry gas, and for Earth is 0.622.

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[edit] References

  1. ^ Bailey, Desmond T. [6 1987] (2 2000). "Upper-air Monitoring", Meteorological Monitoring Guidance for Regulatory Modeling Applications, John Irwin, Research Triangle Park, NC: United States Environmental Protection Agency, p. 9-14. EPA-454/R-99-005. 
  2. ^ AMS Glossary. American Meteorological Society. Retrieved on 2007-05-07.