Not only vortex wave but also inertia-gravitational waves, the wave ensemble is decaying with time,the decay of vortex wave is slower than inertia-gravitational waves.

• 无论是涡旋波还是重力惯性波其连续谱的波包随时间都是衰减的，但涡旋波波包比重力惯性波波包衰减得慢。