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Equivalent potential temperature
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Equivalent potential temperature : ウィキペディア英語版
Equivalent potential temperature
Equivalent potential temperature, commonly referred to as theta-e \left( \theta_e \right), is a quantity related to the stability of a column of air in the atmosphere.
\theta_e is the temperature a parcel of air would reach if all the water vapor in the parcel were to condense, releasing its latent heat, and the parcel was brought adiabatically to a standard reference pressure, usually 1000 hPa (1000 mbar) which is roughly equal to atmospheric pressure at sea level. In stable conditions, \theta_e increases with altitude. If \theta_e decreases with height, convection can occur. The comparison of the equivalent potential temperature of parcels of air at different pressures thus provides a measure of the instability of the column of air.〔(www.theweatherprediction.com )〕
==Explanation==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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