What's the climate consequences of a planet with these characteristics?

I'm designing a new planet, but I'm having some troubles figuring out the climate.

• The planet's rotation axis is at a 45° angle relative to its orbital plane, and each rotation takes 24h.
• The planet's axis tilt has a cycle equal to the planet revolution around its star [That should make it so that the southern hemisphere is always the one closest to the star]
• The planet's orbit is elliptical [Has seasons. The tilt synchronised with the revolution should mean warmer winters to the South, and colder summers to the North (warmer than the rest of the year)].
• The planet has a deep trench/canyon at its equator, running around the entire planet, deep enough to reach the inner mantle (not the core).
• [EDIT] Something that might be worth adding: on both sides of the canyon, I plan on placing tall mountain ridges.

Given these informations, I need help figuring out the climate zones and the the weather events on a planet with those specifics. In particular, how would such a deep rift at the equator influence the climate of each hemisphere?

Here's a couple of simple drawings to show you what I have in mind:

posted over 5 years ago

Mr_Bober‭

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