The Great Red Spot is an anticyclonic storm on Jupiter that is bigger than the Earth. Based on the [Wikipedia article](https://en.wikipedia.org/wiki/Jupiter#Great_Red_Spot_and_other_vortices), it has been shrinking in size for the last 400 years, going from 41 to 16 thousand kilometers wide. What is causing this shrinking?

These articles from 2015 ([1](http://www.techtimes.com/articles/97643/20151021/jupiters-superstorm-is-shrinking-is-changing-red-spot-evidence-of-climate-change.htm), [2](https://space.news/2015-11-25-is-jupiters-great-red-spot-nearing-its-twilight.html)) talk about the spot shrinkage, but are rather vague on the causes. Both of them mention that we would likely learn more with the [Juno probe](https://www.nasa.gov/mission_pages/juno/main/index.html). Now that we have data from Juno, do we know more about why the Great Red Spot is changing in size?