21. Look at geostrophic wind article in wikipedia and you will be able to solve this problem without difficulty. 22. Waves traveling perpendicular to the axis of rotation have zero frequency and are sometimes called the geostrophic modes. 23. This concept is familiar from weather maps, whose isobars show the direction of geostrophic flow in the atmosphere. 24. A geostrophic current may also be thought of as a rotating shallow water wave with a frequency of zero. 25. Generally, Rossby number ratio of inertial to coriolis terms is used to formulate a condition of geostrophic flow. 26. The gradient wind is similar to the geostrophic wind but also includes centrifugal force ( or centripetal acceleration ). 27. In this layer as well the hydrostatic and geostrophic relationships are generally valid and mixing is generally quite weak. 28. This equatorial Beta plane assumption requires a geostrophic balance between the eastward velocity and the north-south pressure gradient. 29. To maintain balance, the geostrophic wind aloft and below adjust, such that regions of divergence / convergence form. 30. Outside the tropics and aloft from frictional effects of the surface, the large-scale winds tend to approach geostrophic balance.
