Are these ocean currents realistic for a planet that rotates 16 times slower than Earth?

Question

Ocean Current Map: The straight red lines are 60* North and South, and the straight blue lines are 30* North and South. The curved blue lines with an arrow represent cold currents, while the curved red lines are hot currents. Black curves are neutral, with no sigificant heat exchange.

To keep the question simple, assume that the ocean depths are about 1,200 meters around the continents, and on average 4000 meters worldwide. The planet in question is about 100 million miles away from the Sun, just slightly cooler than the Earth. It also rotates prograde 16 times slower, so it only has one cell per hemisphere. For anything else, assume the planet in question is identical to Earth.

Using the wind map below, and the planetary characteristics, are these ocean currents realistic?

Wind Map:

Bonus question, but not really critical:

Does there need to be more or less ocean gyres/ocean currents?

Clarifications:

Other questions have asked about ocean currents on a planet with a rotation period different than this question, so I do not think this counts as a duplicate. Feel free to correct me though!

Scale Map:

I am confused. The map looks like the continents are clustered really close how much ocean is between them? — 11Bravo, Jan 08 '21 at 18:47
@11Bravo I just added a third map with scale, sorry about that. Do the various measurements clarify the map better? — Mandelbrot, Jan 08 '21 at 19:22
Does this answer your question? Can someone help me with ocean currents? I'm really confused — Darth Biomech, Jan 09 '21 at 01:17
@DarthBiomech Yes that helps a little bit, the only issue is my planet rotates slower and therefore has only one cell per hemisphere. Do you have any other resources that involve longer rotations? — Mandelbrot, Jan 09 '21 at 05:34
Why is there hot water near the poles and cold water closer to the equator? What heats it up? — Peter Shor, Jan 10 '21 at 19:42
Your southern and south western currents seem to be going the wrong direction. — rek, Jul 07 '21 at 21:50
@PeterShor Red and blue currents show relative temperature: red is warmer than the water at its destination, blue colder. — rek, Jul 07 '21 at 22:08

score 2 · Accepted Answer · answered Jul 13 '21 at 14:41

There's something screwy going on down south:

I haven't built a model of the fluid dynamics, but my eye is drawn to a region of water deficit and surplus, that's also asymmetrical.

What is going on with the current annotated A->C?

The prevailing wind is going in the north.
The prevailing current from planetary rotation is eastward and equator-ward - roughly symmetrical with the northern hemisphere.
Is water is just magically appearing at A?
- Flow from gyre to A is going to be negligible - if it's substantial enough to explain the water deficit then the flow is enough to swamp the gyre.

Same with C->B:

Is water just being magicked away at B?
Full flow is not going B->gyre (due to I'm assuming the island almost blocking the channel), otherwise there'd be notable flow B->A at 30 degrees S enough to destroy the gyre.

I reckon this'd look like this:

I guess as a fundamental rule there's the conservation of water: Water flowing into a region needs to flow out of it - water flowing out of a region needs to get to it.

Are these ocean currents realistic for a planet that rotates 16 times slower than Earth?

1 Answers1

There's something screwy going on down south: