送交者: oldwolf 于 2005-5-05, 13:14:21:
回答: 应当是左旋(逆时针)在北半球。 由 fagus 于 2005-5-05, 12:39:27:
But Coriolis is just working in the very beginning to determine the turning direction, after that it is the converstion of vortex working.
In mathematics formula,
Vortex = (Vortex0 + f) *exp( -D*t)
D is the convergince, in this case, D 0
of Vortex0 = 0, then
Vortex = f exp(-Dt). in Northern Hemisphere,
Vortex > 0, so it is anti-clockwise
But if in the beginning, Vortex0 + f < 0, then Vortex < 0, it will be clockwise.
Vortex0 + f < 0 is very easy, as f is a very small value, at the order of 10e-4.