geostrophic_wind

metpy.calc.geostrophic_wind(height, dx=None, dy=None, latitude=None, x_dim=- 1, y_dim=- 2)[source]

Calculate the geostrophic wind given from the height or geopotential.

Parameters

  • height ((…, M, N) xarray.DataArray or pint.Quantity) – The height or geopotential field.

  • 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 (xarray.DataArray or pint.Quantity) – The latitude, which is used to calculate the Coriolis parameter. Its dimensions must be broadcastable with those of height. Optional if xarray.DataArray with latitude coordinate used as input. Note that an argument without units is treated as dimensionless, which is equivalent 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.

Returns

A 2-item tuple of arrays – A tuple of the u-component and v-component of the geostrophic wind.

Changed in version 1.0: Changed signature from (heights, f, dx, dy)

Examples using metpy.calc.geostrophic_wind

frontogenesis inertial_advective_wind