On the Dynamical Consideration of the Correlation Fields at 500 mb Level

Abstract

Some problems relating to the extended-period forecasting of 500 mb heights by the correlational analysis are studied. In order to examine how the 10-day lag correlation field varies according to the various choices of data periods, an equation which governs the correlation field is derived from the vorticity equation. It is next shown that the simple linear regression method cannot seize the dynamical non-linear effect. And cor-relation coefficients between the terms of barotropic vorticity equation which was divided into the linear and non-linear parts, are examined.