Considering a world where the globe has two orbiting bodies at the opposite sides. They would preferably orbit around the equator. The nature of these bodies is linked to the magic system of the world, but can be simplified for this question so that other one is contributing heat and other one is contributing lack of heat (coldness).
I want the equator area to suffer from drastic and relatively fast temperature changes which make the surface inhabitable. However, getting closer to the poles it should be gradually more habitable, eventually having mild and comfortable climate that allows for agriculture. Earth-like weather phenomena such as storms, winter etc are fine as long as they allow for human-like civilizations to exist.
Preferably the temperatures on equator area would change from very cold to very hot as the bodies orbit it so that when the heat providing body is over certain location, the temperature would be at its hottest (~100C). Then, as the orbiting body continues forward, the temperature starts to decrease and when the cold providing body comes around, the temperature would eventually drop to the low values (~-100C). Hopefully the whole cycle would be few weeks long and when neither of the bodies are straight above a location, the temperatures could moderate to human tolerable range.
Currently, I'm thinking that the orbiting bodies would be smallish compared to the globe, and closer to it than other celestial bodies. As they radiate the heat/lack of heat the dispersion effect would be bit similar what happens with sunlight on earth: polar areas get lower concentration because of the angle the rays reach it, that's why the temperatures and climate are milder there. Bit similar effect would happen on the equator when the orbiters are not directly above a location. Some of the radiation from both bodies would reach the ground and temperatures are affected by both of them. When the orbiter is on the other side of the globe, no radiation would reach the opposite side (blocked by the globe).
Assuming otherwise nearly earth-like planet would the setup be possible?
- Could the planet be reasonably sized, preferably smaller than earth with at least one continent that spans from near pole (habitable) to the equator (inhabitable)? Idea is that sea could not be buffer between inhabitable and habitable area.
- Would the climate situation on equator totally mess the climate for the whole planet?
- Is the cycle of couple of weeks possible, considering things like atmosphere, possible seas and ground heating/cooling fast?
If these are not possible, is there changes to the setup that would allow it?
- Other celestial bodies such as sun(s), moon(s) etc can exist or not exist in a way that would make the setup possible.
- Physical nature of the two orbiters can be hand waved to "just a magical energy source with no mass or gravitational effects" if necessary.
- Min/max temperatures are not set in stone, but should be outside of something that normal human and most flora/fauna can tolerate for any extended period without specific gear/magical support.