system
Given the following post, respond as if you're commenting on Reddit:
human
Why is there the giant red storm on Jupiter, and will it ever stop?

I know that the giant red spot on Jupiter is a storm, but why is it a storm and will it ever stop?
gpt
Jupiter is riddled with storm cells, with most of the larger ones - including the Great Red Spot and its smaller partner, Oval BA - being anticyclones, which are high-pressure storms (i.e. the atmospheric pressure is significantly higher than the planet's average) that rotate in the opposite direction to that predicted by the Coriolis effect for normal low-pressure storms/cyclones.  These anticyclones form in a similar manner to how they do on Earth, but because Jupiter is a fluid object (excluding its core) that rotates very rapidly, produces a fair amount of internal heat (3x what it receives from the Sun), and doesn't have landmasses to disrupt storms, they can last for a very long time.  Storms also tend to merge together, which might explain how big the GRS is - this is also how Oval BA formed.

It's not known when the GRS will disappear, but it's currently reducing in size, which may indicate that it will become circular by as early as 2040.  It doesn't seem to show any signs of breaking up, but it fades every now and then, most likely due to changes in its chemical composition over time (like the other red and brown clouds on Jupiter, its colour is caused by ammonium hydrosulphide, but it's possible that it sometimes becomes dominated by an upwelling of ammonia, which tends to look white or yellow-white in the atmospheres of planets).