Abstract
In view of the suggested importance of lateral mixing, C=G. ROSSBY has given particular attention to the dynamics of the jet stream and its applications in meteorology and oceanography. But the conception of the absolute vorticity is often confused by several authors. The present author intends to give particular attention to the horizontal component of the total vorticity, as well as the so-called “absolute vorticity” which normally means the component about the vertical of the total vorticity.
