Definitions for "Geostrophic Wind" Add To Word List
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The theoretical wind generated when pressure gradient forces are exactly balanced by the Coriolis force. Most atmospheric motions are not geostrophic, due to frictional and other effects.
The calculated or measured wind that occurs when the pressure gradient acceleration equals the Coriolis acceleration. The geostrophic wind is seen above the boundary layer, in the upper layers of the atmosphere.
defined as the (theoretical) wind that would blow on a rotating planet which results from a balance between the pressure gradient causing the initial displacement of the air, and the apparent (to us on the earth) deflecting force due to the planetary rotation. Many corrections are needed to find the 'true' wind vector amongst which are the effects of friction and the several forces involved when the pressure pattern changes - which is the usual case. However, by this definition we get the general statement that the speed of the geostrophic wind is proportional to the pressure gradient, or inversely proportional to the distance between isobars/contours. Curvature of the flow must also be taken into account ... see Gradient wind.
In meteorology, the theoretical wind resulting from the balance of the pressure gradient force and the geostrophic force. Analogous to the geostrophic current in oceanography.
A theoretical horizontal wind blowing in a straight path, parallel to the isobars or contours, at a constant speed. The geostrophic wind results when the coriolis force exactly balances the horizontal pressure gradient force.
The wind that occurs through a balance of pressure gradient and Corriolis forces
The horizontal wind for which the coriolis acceleration (caused by the Earth's rotation) exactly balances the horizontal pressure force. In practice it is assumed that this marks the upper limit of frictional influence of the Earth's surface. The geostrophic wind blows along the contours on a constant pressure surface. The speed of the geostrophic wind is dependent upon how close your pressure contour are together. Thus, when your pressure contours are close together, you will see a strong geostrophic wind. The opposite occurs when your pressure contours are far apart.
A wind that is balanced by the Pressure Gradient Force and Coriolis. To remain in geostrophic balance the wind needs to occur in the middle or high latitudes (since Coriolis is strong enough there) and needs to flow at a constant speed and direction (to prevent ageostrophic accelerations and centrifugal accelerations).
That horizontal wind velocity at which the Coriolis acceleration exactly balances the horizontal pressure force. It is directed along contour lines or isobars.