metpy.calc.
inertial_advective_wind
Calculate the inertial advective wind.
This formula is based on equation 27 of [Rochette2006].
u ((…, M, N) xarray.DataArray or pint.Quantity) – x component of the advecting wind
xarray.DataArray
pint.Quantity
v ((…, M, N) xarray.DataArray or pint.Quantity) – y component of the advecting wind
u_geostrophic ((…, M, N) xarray.DataArray or pint.Quantity) – x component of the geostrophic (advected) wind
v_geostrophic ((…, M, N) xarray.DataArray or pint.Quantity) – y component of the geostrophic (advected) wind
dx (pint.Quantity, optional) – The grid spacing(s) in the x-direction. If an array, there should be one item less than the size of u along the applicable axis. Optional if xarray.DataArray with latitude/longitude coordinates used as input.
dy (pint.Quantity, optional) – The grid spacing(s) in the y-direction. If an array, there should be one item less than the size of u along the applicable axis. Optional if xarray.DataArray with latitude/longitude coordinates used as input.
latitude (pint.Quantity, optional) – Latitude of the wind data. Optional if xarray.DataArray with latitude/longitude coordinates used as input. Note that an argument without units is treated as dimensionless, which translates to radians.
x_dim (int, optional) – Axis number of x dimension. Defaults to -1 (implying […, Y, X] order). Automatically parsed from input if using xarray.DataArray.
y_dim (int, optional) – Axis number of y dimension. Defaults to -2 (implying […, Y, X] order). Automatically parsed from input if using xarray.DataArray.
(…, M, N) xarray.DataArray or pint.Quantity – x component of inertial advective wind
(…, M, N) xarray.DataArray or pint.Quantity – y component of inertial advective wind
Notes
Many forms of the inertial advective wind assume the advecting and advected wind to both be the geostrophic wind. To do so, pass the x and y components of the geostrophic wind for u and u_geostrophic/v and v_geostrophic.
Changed in version 1.0: Changed signature from (u, v, u_geostrophic, v_geostrophic, dx, dy, lats)
(u, v, u_geostrophic, v_geostrophic, dx, dy, lats)