Journal of the Meteorological Society of Japan. Ser. II
Online ISSN : 2186-9057
Print ISSN : 0026-1165
ISSN-L : 0026-1165
Numerical Analysis of Atmospheric Motions
Y. Kurihara
Author information
JOURNAL FREE ACCESS

1960 Volume 38 Issue 6 Pages 288-304

Details
Abstract

In order to get fundamental and quantitative information on the primitive equation of motion, numerical analysis was performed for six ten-day periods by making use of six-hourly data of upper air observations at three stations in Japan. The average magnitude of each term in the equation is presented in Section 3 through 7 together with ten-day mean value of each term.
Inertia force due to horizontal motion, i.e. -V•∇V, is an important factor in the equation, and its magnitude in zonal direction is as much as in meridional direction at the levels lower than 400mb. Magnitude of -ω•∂V/∂p is somewhat small. Ten-day mean of -ω•∂u/∂p suggests that zonal momentum is transported downward on the average at northern Japan. Acceleration derived from metric force is generally small, but the treatment of this term in time-averaged equation of motion in meridional direction has to be done carefully. Coriolis force and pressure gradient are main factors in the equation. So far as this analysis is concerned, observed wind is subgeostrophic on the whole. Frictional acceleration in the free atmosphere was estimated as a residue of other terms in the equation. But no definite conclusion is obtained about it. Further study on frictional force is necessary.

Content from these authors
© Meteorological Society of Japan
Previous article Next article
feedback
Top