vertical_velocity_pressure¶
- metpy.calc.vertical_velocity_pressure(w, pressure, temperature, mixing_ratio=0)¶
Calculate omega from w assuming hydrostatic conditions.
This function converts vertical velocity with respect to height \(\left(w = \frac{Dz}{Dt}\right)\) to that with respect to pressure \(\left(\omega = \frac{Dp}{Dt}\right)\) assuming hydrostatic conditions on the synoptic scale. By Equation 7.33 in [Hobbs2006],
\[\omega \simeq -\rho g w\]Density (\(\rho\)) is calculated using the
density()
function, from the given pressure and temperature. Ifmixing_ratio
is given, the virtual temperature correction is used, otherwise, dry air is assumed.- Parameters
w (
pint.Quantity
) – Vertical velocity in terms of heightpressure (
pint.Quantity
) – Total atmospheric pressuretemperature (
pint.Quantity
) – Air temperaturemixing_ratio (
pint.Quantity
, optional) – Mixing ratio of air
- Returns
pint.Quantity
– Vertical velocity in terms of pressure (in Pascals / second)
See also