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The difference between geostrophic wind and gradient wind is caused by:
  • A
    curvature of isobars.
  • B
    slope of pressure surfaces.
  • C
    friction.
  • D
    horizontal temperature gradients.
GEOSTROPHIC WIND vs GRADIENT WIND
  • The Geostrophic wind blows parallel to straight isobars and is said to have only 2 forces. These 2 forces, Pressure Gradient Force PGF and Coriolis Force CF, must be working opposite from each other and in balance.
  • The Gradient wind occurs when isobars are curved. There is a force that comes into play which makes the wind follow a curved path parallel to isobars. It is, therefore, a combination of 3 forces:
PGF
CF
Centrifugal Force (acts perpendicular to the direction of rotation and away from centre of rotation)

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