Surface geostrophic velocity= 0.5 m/s, density = 1026kg/m^3, gravity= 9.8m/s, ring radius = 50km. You take velocity measurment through a g is this ring?olf stream ring along a west to east transect at 38 degree north.
You repeat your velocity measurement at various depths. Ypou find that geostrophic north -south velocity is relatively unchanged to about 400 m depth, but is near zero below 600 m. What is the shape of isopycanal surface between 400 and 600m? Estiment the density differance across the thermocline. Is this a warm or a cold core ring?
You track the ring with satellite imagery and find that it moves north by 10 dgrees. If the vertical structure has not changed, and assuming inviscid motion, what has happened to the vorticity?