Virtual Temperature
The virtual temperature is the temperature a parcel which contains no moisture would have to equal the density of a parcel at a specific temperature and humidity.
VIS ...
Virtual Temperature The temperature a parcel of air would have if the moisture in it were removed and its specific heat was added to the parcel.
VIRTUAL TEMPERATURE: Temperature to which absolutely dry air would have to be brought in order for it to have the density as moist air considered at the same pressure.
Virtual temperature An adjustment applied to the real air temperature to account for a reduction in air density due to the presence of water vapor.
Viscosity The resistance of fluid flow.
VIRTUAL TEMPERATURE- The temperature of the air plus latent heat release to the air due to condensation. In air with moisture, the virtual temperature is always greater than the actual temperature.
VIS- Visible satellite imagery ...
Used in aviation, it is computed from the station pressure at takeoff and the virtual temperature at the particular altitude under consideration. DEPRESSION In meteorology, it is another name for an area of low pressure, a low, or trough.
where k is von Kármán's constant, u* is the friction velocity (a measure of turbulent surface stress), g is gravitational acceleration, Tv is virtual temperature, and Qv0 is a kinematic virtual temperature flux at the surface.
Virtual Potential TemperatureThe virtual potential temperature is the temperature a parcel at a specific pressure level and virtual temperature would have if it were lowered or raised to 1000 mb. This is defined by Poisson's equation.
Most convective clouds are driven by positive buoyancy, with virtual temperature greater than the environment, but clouds with precipitation, evaporation, and/or melting can produce negatively buoyant convection. See slantwise convection. 3.
DENSITY ALTITUDE The altitude at which a given density is found in the standard atmosphere. Used in aviation, it is computed from the station pressure at takeoff and the virtual temperature at the particular altitude under consideration.
DENSITY ALTITUDE
The altitude at which a given density is found in the standard atmosphere. Used in aviation, it is computed from the station pressure at takeoff and the virtual temperature at the particular altitude under consideration.
 See also: Temperature, Air, Surface, Velocity, Horizon
  
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