Meteorology · Synoptic Charts — Geostrophic Wind
The geostrophic wind is the theoretical wind that results from a balance between which two forces, blowing parallel to straight isobars?
- ACentrifugal force and gravity
- BGravity and friction
- CThe pressure gradient force and the Coriolis force✓ Correct
- DFriction and the pressure gradient force only
Explanation
Above the friction layer, with straight isobars, the pressure gradient force (toward low pressure) balances the Coriolis force (deflecting right in the NH). The resulting geostrophic wind blows parallel to the isobars at a speed set by the gradient.
Authority: Bowditch (Pub. No. 9), wind theory; WMO
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