Weather On the weather forecasts, you often show plots of isobars moving and then seem to indicate that the winds will be running parallel to the isobars.

Because the geostrophic flow takes place in the upper atmosphere, far removed from the influence of the surface and at low air density, the slow-down by friction plays a very minor role.

Consistent with observations 24,25, the surface speed of geostrophic eddies exceeds 50 cm s −1, whereas the temporal and zonal mean flow speed (not shown) is only about 10 cm s −1.

The geostrophic flow weakens along the periphery of the eddy as the warm current gradually cools down through horizontal mixing, resulting in an accelerating anticyclonic current around the ...

The breaking of orographic gravity waves induces a zonal wave drag in the middle troposphere, which destroys the geostrophic balance of the large-scale westerly flow and thus drives an ...