Virtual potential temperature: Difference between revisions

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{{DISPLAYTITLE:virtual potential temperature}}


The theoretical [[potential temperature]] of [[dry air]] that would have  the same [[density]] as [[moist air]].<br/> It is used as a convenient surrogate for density in [[buoyancy]] calculations. The virtual potential  temperature &#x003b8;<sub>''v''</sub> is defined by  <blockquote>[[File:ams2001glos-Ve14.gif|link=|center|ams2001glos-Ve14]]</blockquote> where &#x003b8; is the actual potential temperature, ''r'' is the [[mixing ratio]] of [[water vapor]], and ''r''<sub>''L''</sub> is the  mixing ratio of liquid water in the air. Temperatures must be in units of Kelvin, and mixing ratios  in units of g<sub>''water''</sub>/g<sub>''dry air''</sub>. Because water vapor is less dense than dry air, humid air has a warmer &#x003b8;<sub>''v''</sub>  than dry air. Liquid water [[droplets]], if falling at their terminal [[velocity]] in air, make the air heavier  and are associated with colder &#x003b8;<sub>''v''</sub>. For saturated or [[cloudy]] air, use [[saturation mixing ratio]] in place  of ''r'', while for unsaturated air, use ''r''<sub>''L''</sub> = 0. <br/>''See'' [[virtual temperature]].<br/>


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<div class="termentry">
== temperatura potencial virtual ==
  <div class="term">
== virtual potential temperature ==
Es la temperatura potencial teórica del aire seco que tendría la misma densidad que el aire húmedo.
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Se utiliza como un sustituto conveniente para la densidad en los cálculos de empuje hidrostático. La temperatura potencial virtual θ''v'' se define por <blockquote>[[File:ams2001glos-Ve14.gif|link=|center|ams2001glos-Ve14]]</blockquote>
<div class="definition"><div class="short_definition">The theoretical [[potential temperature]] of [[dry air]] that would have the same [[density]] as [[moist air]].</div><br/> <div class="paragraph">It is used as a convenient surrogate for density in [[buoyancy]] calculations. The virtual potential  temperature &#x003b8;<sub>''v''</sub> is defined by <div class="display-formula"><blockquote>[[File:ams2001glos-Ve14.gif|link=|center|ams2001glos-Ve14]]</blockquote></div> where &#x003b8; is the actual potential temperature, ''r'' is the [[mixing ratio]] of [[water vapor]], and ''r''<sub>''L''</sub> is the  mixing ratio of liquid water in the air. Temperatures must be in units of Kelvin, and mixing ratios  in units of g<sub>''water''</sub>/g<sub>''dry air''</sub>. Because water vapor is less dense than dry air, humid air has a warmer &#x003b8;<sub>''v''</sub>  than dry air. Liquid water [[droplets]], if falling at their terminal [[velocity]] in air, make the air heavier  and are associated with colder &#x003b8;<sub>''v''</sub>. For saturated or [[cloudy]] air, use [[saturation mixing ratio]] in place  of ''r'', while for unsaturated air, use ''r''<sub>''L''</sub> = 0. <br/>''See'' [[virtual temperature]].</div><br/> </div>
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donde θ es la temperatura potencial real, ''r'' es la proporción de mezcla del vapor de agua y ''rL'' es la proporción de mezcla del agua líquida en el aire. Las temperaturas deben estar en unidades de Kelvin, y las proporciones de mezcla en unidades de g''agua''/g''aire seco''. Debido a que el vapor de agua es menos denso que el aire seco, el aire húmedo tiene una θ''v'' más cálida que el aire seco. Las gotas de agua líquida, si caen a su velocidad terminal en el aire, hacen que el aire sea más pesado y están asociadas con θ''v'' más frías. Para aire saturado o nublado, use la proporción de mezcla de saturación en lugar de ''r'', mientras que para aire insaturado, use ''rL'' = 0.
 
<br>''Consulte'' temperatura virtual.
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Latest revision as of 09:56, 19 April 2024


The theoretical potential temperature of dry air that would have the same density as moist air.
It is used as a convenient surrogate for density in buoyancy calculations. The virtual potential temperature θv is defined by

ams2001glos-Ve14

where θ is the actual potential temperature, r is the mixing ratio of water vapor, and rL is the mixing ratio of liquid water in the air. Temperatures must be in units of Kelvin, and mixing ratios in units of gwater/gdry air. Because water vapor is less dense than dry air, humid air has a warmer θv than dry air. Liquid water droplets, if falling at their terminal velocity in air, make the air heavier and are associated with colder θv. For saturated or cloudy air, use saturation mixing ratio in place of r, while for unsaturated air, use rL = 0.
See virtual temperature.


temperatura potencial virtual[edit | edit source]

Es la temperatura potencial teórica del aire seco que tendría la misma densidad que el aire húmedo.

Se utiliza como un sustituto conveniente para la densidad en los cálculos de empuje hidrostático. La temperatura potencial virtual θv se define por

ams2001glos-Ve14

donde θ es la temperatura potencial real, r es la proporción de mezcla del vapor de agua y rL es la proporción de mezcla del agua líquida en el aire. Las temperaturas deben estar en unidades de Kelvin, y las proporciones de mezcla en unidades de gagua/gaire seco. Debido a que el vapor de agua es menos denso que el aire seco, el aire húmedo tiene una θv más cálida que el aire seco. Las gotas de agua líquida, si caen a su velocidad terminal en el aire, hacen que el aire sea más pesado y están asociadas con θv más frías. Para aire saturado o nublado, use la proporción de mezcla de saturación en lugar de r, mientras que para aire insaturado, use rL = 0.
Consulte temperatura virtual.

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