Zonal Winds - The pattern of winds in the atmosphere of a planet in which the pattern of wind speeds varies with latitude ...
The tracking of numerous cloud features allowed determination of zonal winds blowing in the upper troposphere of Uranus. At the equator winds are retrograde, which means that they blow in the reverse direction to the planetary rotation.
Just how deep into the interior do the zonal winds extend? What mechanism drives them? Why is the GRS so persistent? There are actually several theoretical models that seem to work. We need more data to decide between them.
See also: Energy, Venus, Earth, Open, Jupiter
 
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