Talk:Wet-bulb potential temperature

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Replaced definition

The definition given was indecipherable, so I replaced it with one I found elsewhere that sounds correct to me (a non-expert). If someone wants to restore the original, they should explain what it means.

Original: "the temperature attained by mass of air brought adiabatically to saturation ..."

That means an initially sub-saturated air mass lifted to an altitude where it is saturated at a lower temperature and pressure.

" ... and then carried along moist-adiabat to 1000 mb (hPa)."

That means lowering the parcel so as to reduce the temperature and pressure. But if that is done adiabatically, it can not remain on the moist adiabat unless water vapor is added.

Maybe the original definition described following lines on a chart without regard to whether it is physically possible to do so. But the original definition clearly refers to a physical process not a computational procedure.

Retired Pchem Prof (talk) 01:00, 18 September 2017 (UTC)[reply]