If the earth was a cube, what would the weather be like?

Q: Hello, my name is T. I am in sixth grade this year. I really want to know, if our earth was shaped into a cube, what would the weather look like?

Answer: Your question is very interesting. This week I discussed your question with my friends from the School of Astronomy at my university. We tried to explain the possible impact of the "cube planet". Living on a "square planet" is really weird for those of us who are used to living on a "round planet".

A hypothetical cube Earth, where our continents and clouds can be seen. What the weather will look like on Cube Star? depends largely on how the cube rotates. You can take a look at this chart I made. If it rotates with the center points of the upper and lower sides as its axis, then the weather on the upper and lower sides should be similar to the Earth's polar climate, while the weather on the side is closer to the equatorial weather. In this case, there would be no temperate zones on Earth like Europe and North America. If the rotation axis of the "Square Star" were replaced by two opposite vertices, then each surface would have a temperate climate, and there would be no polar weather or equatorial weather regions.

I would like to know, in your imagination, how does the ocean on this "Square Star" exist? In fact, it is impossible to have an ocean on a square star (because it is liquid). So your "Square Star" should look like a cube with an ocean in the middle of each side, right? Those six vertices look like huge mountains to the residents of Square Star! I think that at the junction of the two sides, even more bizarre things happen. The wind coming from the surface will suddenly shoot straight into the sky due to the change in the direction of the ground! I'm pretty sure these boundaries are likely to create some weird weather weirdness.

The imaginary cube earth is spread out flat, with the North Pole at the top and the South Pole at the bottom

Like the ocean, the atmosphere also needs to be a sphere. We assume that the atmosphere rises by 1,000 kilometers (the earth is still a ball at this time), then this is a sphere with a radius of 6,400 kilometers + 1,000 kilometers = 7,400 kilometers. This is a correct result. If a cube with the same volume as the earth has a side length of 10,000 kilometers, then the distance from the vertex of the cube to the center is 8,700 kilometers. This height will definitely break out of the atmosphere!

Anyway, this question is really cool! I hope my answer satisfies your curiosity. I may not have considered all possibilities or added all conditions to the assumptions (for example, the ocean and atmosphere cannot surround the surface of the cube; the climate everywhere on the same surface may not be exactly the same. etc.), but I still hope my answer can bring some interest to you.

Of course, this is not an unusual problem. We often mention this situation in some scientific experiment projects. Sometimes we feel that some questions are strange. That is because it is difficult to give a completely correct answer in reality. Maybe the answer given is correct, but it is difficult for us to accept (but it is more interesting this way).