Physical Oceanography
Fall 2000
Problem #9
Due October 23, 2000

a.) What is the balance of forces on a parcel of fluid if it is experiencing inertial motion? Assume that there are no frictional or pressure-gradient forces.

b.) In August 1936, Gustafson and Kullenberg observed inertial motion in the Baltic Sea, see figure below (adapted from Gill, A.E., Atmosphere - Ocean Dynamics, 1982). Calculate the velocity of this parcel of fluid on its fifth revolution assuming that its path is circular.

c.) Gustafson and Kullenberg observed a 14 hour period of oscillation, what is the theoretical inertial period for this parcel of fluid? Is there any difference? Why?