Source of the weather on Neptune

[ryan liberty]

With the fastest sustained wind speeds in the solar system of 700mph. The main explanation I have heard is Neptune's primordial heat from it's formation combined with the lower atmospheric drag due to lower temperature. Neptune's southern hemisphere is currently in summer and has gotten warmer. I still wonder why this is possible.

 

[davenn]

I still wonder why this is possible.

why what is possible ?

 

[unusually_wrong]

Maybe this link will help?

https://www.space.com/21157-uranus-neptune-winds-revealed.html