On the Horizontal Transfer of Angular Momentum and Its Relation to the Local Zonal-index Tendency
1954 年 5 巻 2 号 p. 134-143
詳細
1954 年 5 巻 2 号 p. 134-143
The geostrophic angular momentum transfer vector on the 500 mb level is calculated over the Far East. The angular momentum convergence in a sector of 10 degrees in latitude and 30 degrees in longitude is compared with the local zonal-index tendency in the same area. Good relation is found between them on the variation with a period of several days, but only 30% of the horizontal convergence of angular momentum appears in the local change.
Also,45-day mean angular momentum transfer vector is calculated. Its horizontal convergence shows a remarkable locality having such a value as suffices to cause the zonal velocity change 6 m⋅sec-1 in a day. The eddy transfer has northward component almost everywhere in our region, but is smaller than the transfer due to mean wind.
