Shape and kinematics of the streamlines as a function of vertical distance z above the disk midplane for the four computed MHD DW solutions in Table 1. a: cylindrical radius r, b: velocity along the jet axis V_z, c: azimuthal rotation velocity V_ϕ, d: radial expansion velocity V_r. Filled dots indicate the Alfvén surface. Distances are scaled by the launch radius r₀, and velocities by the Keplerian speed at r₀, V_K (r₀). Models are denoted as LxWy with x = λ_BP the magnetic lever arm parameter and y = = r_max∕r₀ the widening factor (as defined in Eqs. (3) and (4) and listed in Table 1).