what would happen to the earths preassure belts and wind systems if the earth wasnt tilted, instead vertical?

Answer 1

We'd have no seasons. Every day, the sun would track right over the Equator, and always be low on the horizon (day and night) at the poles. (That means the poles would always be in twilight.)

The Arctic and Antarctic Circles, and the Tropics of Cancer and Capricorn would not exist.

Since the earth is tilted at 23.5 degrees, there's an annual shift of double that -- 47 degrees between the two Tropics -- in the sun's position. That would no longer occur. That shift greatly expedites the north-south movement of heat, both in the atmosphere and in the oceans. Without that, some thermal circulation would still occur, but nothing like we now experience.

For just one example, there's a stable high pressure system in the North Pacific that regularly moves north and south with the seasons. That's what produces California's 4-month rainy season. Under your scenario, that wouldn't happen.

Answer 2

No seasons

Answer 3

They would shift.

Answer 4

i dont know