system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What enables the Red Dot Storm on Jupiter to last as long as it has?
gpt
We don’t really know.  It has waxed and waned over the centuries but we only have a few hundred years of observation data and the planet is billions of years old.

The great red spot may be anomalous behavior even by Jupiter standards, or it may be typical.

Unlike Earth, Jupiter has no surface features so there are no mountains or deserts or oceans or plateaus to break up circulating wind currents.  They can circulate unperturbed forever, and you can even see this fairly clear banding in the planet’s atmosphere.  Earth’s atmospheric currents are very chaotic by comparison and dip and wobble around with the underlying geography and seasonal tilt.

Jupiter has no seasons (3 degree axial tilt) and no geography so these large atmospheric systems seem to be difficult to disrupt once they begin.  They’re powered by internal heat from below rather than external heat from the sun, so even day/night cycles mean very little.