How would weather differ on a planet with a longer day?

[Sherwood Botsford]

Hypothetical question that came up in World Building stack exchange.

The question asked for what the longest reasonable day length would be.

I thought that a 100 hour day:
* Afternoons in what are now hot deserts would be uninhabitable.
* Frost traps in more polar climates would be difficult.
* Higher temperature swings would result in a huge (yuge?) afternoon thunderstorms.

Now I started to get on thin ice.

With a slower rotation, coriolis forces will be smaller. Would this make cyclonic storms larger?

Would the hadley circulation change -- fewer, but larger cells. Bigger weather system that moved more slowly?

Anyone point me to a good exometeorology simulator?

 

[PeterO]

Hypothetical question that came up in World Building stack exchange.

The question asked for what the longest reasonable day length would be.

I thought that a 100 hour day:
* Afternoons in what are now hot deserts would be uninhabitable.
* Frost traps in more polar climates would be difficult.
* Higher temperature swings would result in a huge (yuge?) afternoon thunderstorms.

Now I started to get on thin ice.

With a slower rotation, coriolis forces will be smaller. Would this make cyclonic storms larger?

Would the hadley circulation change -- fewer, but larger cells. Bigger weather system that moved more slowly?

Anyone point me to a good exometeorology simulator?

I though coriolis force and centrifugal force were in the same group - non-existent ficticious forces.
The coriolis affect and centrifugal effect maybe, but not force.

 

[Sherwood Botsford]

I thought coriolis force and centrifugal force were in the same group - non-existent ficticious forces. The coriolis effect and centrifugal effect maybe, but not force.

Reference https://www.physicsforums.com/threads/how-would-weather-differ-on-a-planet-with-a-longer-day.909992/

You are correct. They arise because the planetary surfaces is not an inertial frame. If you are going to use the rotating reference system then they are 'real'