nicer way to get function space for computing degree of vorticity space and raise a NotImplementedError if you try to compute any vorticity diagnostics in anything other than a 2D spherical geometry
nicer way to get function space for computing degree of vorticity space and raise a NotImplementedError if you try to compute any vorticity diagnostics in anything other than a 2D spherical geometry

firedrakeproject/dcore,firedrakeproject/gusto