Potential temperature
1The potential temperature of a parcel of fluid at pressure
P
{\displaystyle P}
is the temperature that the parcel would attain if adiabatically brought to a standard reference pressure
P
0
{\displaystyle P_{0}}
, usually 1,000 hPa (1,000 mb). The potential temperature is denoted
θ
{\displaystyle \theta }
and, for a gas well-approximated as ideal, is given by
θ
=
T
(
P
0
P
)
R
/
c
p
,
{\displaystyle \theta =T\left({\frac {P_{0}}{P}}\right)^{R/c_{p}},}
where
T
{\displaystyle T}
is the current absolute temperature (in K) of the parcel,
R
{\displaystyle R}
is the gas constant of air, and
c
p
{\displaystyle c_{p}}
is the specific heat capacity at a constant pressure.
R
/
c
p
=
0.286
{\displaystyle R/c_{p}=0.286}
for air (meteorology).
Source: https://en.wikipedia.org/wiki/Potential_temperature
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