This result can be compared with Eq. (3.3) in Stommel and Moore. They obtain the equation where and in their notation, and the left-hand side is the radial acceleration in polar coordinates according to the rotating observers. In this example, their Eq. (3.4) for the azimuthal acceleration is zero because the radius is fixed and there is no angular acceleration. See Henry Stommel. An Introduction to the Coriolis Force. Columbia University Press, 1989 — 55-bet. ISBN 0-231-06636-8. „coriolis Stommel.“