In a paragraph of approximately eight lines explain how the geostrophic wind develops?
Question: In a paragraph of approximately eight lines explain how the geostrophic wind develops?
The geostrophic wind is a theoretical wind that flows parallel to the isobars, or lines of constant pressure, in the upper atmosphere. It is the result of a balance between the pressure gradient force, which pushes air from high to low pressure, and the Coriolis force, which deflects air to the right in the northern hemisphere and to the left in the southern hemisphere. The geostrophic wind does not cross the isobars, so it does not cause mass transfer from highs to lows.
To explain how the geostrophic wind develops, we need to consider an air parcel that initially moves from high to low pressure due to the pressure gradient force. As it starts to move, it experiences a Coriolis force that is perpendicular to its motion and increases with its speed. At some point, the Coriolis force becomes equal and opposite to the pressure gradient force, and the air parcel stops accelerating. It then moves at a constant speed along the isobars, following a geostrophic balance. This balance is achieved at about 2-3 km above the surface, where the frictional effect of the ground is negligible.
The geostrophic wind is an idealized concept that rarely holds exactly in nature. There are other factors that can disturb the geostrophic balance, such as friction, curvature of the isobars, changes in pressure with time, and variations in Coriolis force with latitude. However, the geostrophic wind is a useful approximation for large-scale winds in the mid-latitudes, where these factors are relatively small. The geostrophic wind also influences the formation and behavior of jet streams, Rossby waves, and other atmospheric phenomena.
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