shoot.dyn.get_relvort

shoot.dyn.get_relvort(u, v, dx=None, dy=None)

Compute relative vorticity

Parameters:

• u (xarray.DataArray) – Zonal velocity component.

• v (xarray.DataArray) – Meridional velocity component.

• dx (xarray.DataArray, optional) – Grid resolution along X in meters.

• dy (xarray.DataArray, optional) – Grid resolution along Y in meters.

Returns:

Relative vorticity in s^-1.

Return type:

xarray.DataArray

Example

>>> import xarray as xr
>>> import numpy as np
>>> lon = xr.DataArray(np.linspace(0, 1, 50), dims="lon",
...     attrs={"standard_name": "longitude"})
>>> lat = xr.DataArray(np.linspace(43, 44, 40), dims="lat",
...     attrs={"standard_name": "latitude"})
>>> u = xr.DataArray(np.random.rand(40, 50), dims=("lat", "lon"),
...     coords={"lon": lon, "lat": lat})
>>> v = xr.DataArray(np.random.rand(40, 50), dims=("lat", "lon"),
...     coords={"lon": lon, "lat": lat})
>>> rv = get_relvort(u, v)