Ramble #3 (of Many): Whatever is the Weather?

So I've been thinking a lot about this particular topic. I happen to study (Marine) Environmental Science, and clearly weather and climate plays a decent part in shaping the environment.

So what of Equestria's weather? Today's discussion is:

Equestrian Weather and How It Differs From Ours. Because There is a Huge Difference

And break!

Firstly, let's go into a brief summary of how our weather works.

It's a mixture of the Earth's rotation and how close you are to the equator. Some of you may have clicked the problem already, but if not, have no fear.

From the equator, comes the weather. I'm trying to be brief and not too technical as I mentioned, so:

Basically there are 'biomes' that extend in bands from the equator - rainforest -> desert -> plains -> deciduous forest -> coniferous forest -> Taiga/Tundra -> poles. Roughly. Obviously differences in landmasses and mountains and stuff have their effects too. But these 'bands' spread out from the equator like a mirror (well, they'd be more obvious if there was more landmass to the South but *shrug*

But the Earth's rotation is important too, because this determines whether the weather goes East or West. This is called the Coriolis Effect and it's also the thing responsible for the way water will swirl down a drain. It effects the oceans in a huge way (which is where most of the weather generates) and can influence currents, tides, upwelling and downwelling (Eckman Transport!) of water. The Coriolis Effect maintains the Earth's magnetic field.

But why is this relevant to Equestria?

Well, does their planet even rotate. Luna and Celestia move the Sun and the Moon, which strongly suggests that their world is not heliocentric, and instead the Sun and Moon orbit them. So, this would essentially mean...

No Coriolis effect.

Which is huge.

Without the Coriolis effect (how do their drains work??) their weather would be very, very different. Without the Coriolis Effect, the weather would simply move North-South and vice-versa in one big loop. The equator would be hotter and the poles would be colder, and big land masses would get very little water, leading to deserts. But then, if Celestia is the one moving the Sun... is there an Equator?

Let's look at the Map of Equestria:

Well, it's not Earth, definitely. The interesting part here, is that this map only seems to show the pony world's version of the continent of 'North America', plus a little bit of Europe, Africa, and the Arctic.
But this is not a ramble about the interesting word choice of 'Undiscovered West', 'Mysterious South', or 'Into the Unknown'. That'll come another time.

No, the focus today is on the weather and climate. Now, look at the map. It seems to actually follow the biome trends I described earlier, in addition to the extra-heated equator (large desert area, from the Badlands across to Los Pegasos, and up to Appleoosa. So maybe we can assume that Celestia does, indeed, maintain an Equator. The North of the continent is pretty heavily iced - but does not appear to actually connect with the Artic continent seen in the distance at the top, there. So, it's extra cold there.

But the centre of, let's call it North Equestria, seems to have plenty of water. Would this not be in opposition to this theoretical weather patterns? Well, no, not exactly.

This introduces the other factor.

Magic.

There are two parts to weather and magic:
Control of weather.
Wild weather.

Now, Control. In canon, we've seen three kinds of pony directly use weather magic. Pegasi, clearly, are the main perpetrators. They've been managing the weather for millenia. Then, unicorns. More specifically Rarity in Magical Maystery Cure. True, she had Rainbow's cutie mark at the time, but in Winter Wrap Up, it is implied that the weather is changed using magic in Canterlot. Given that the Pegasi were allowed to fly and do their thing with the clouds in 'traditional Ponyville' fashion, it can be implied that the magic used was by unicorns.
Either that, or our third example - alicorns.

Celestia and Luna battled with the snow clouds in the S6 opener. They were using lasers, so we can be assured that whatever they were doing was not explicitly 100% pegasus magic. Luna called up a small storm for her arrival in Luna Eclipsed without even touching any clouds.

We haven't seen any earth ponies doing anything with weather, nor any other species. Griffons have been shown to be able to stand on clouds, but we don't know if they can actually manipulate the weather beyond their presumed ability to push around clouds due to being able to make contact. No idea about Changelings, and certainly the Breezies are incapable. I think that's most of the flying sapients?

There are also weather-changing monsters - the Windigos - though they could be equally sorted into...

Wild Weather.

Now, the Wild Weather is interesting (I use that word a lot but it's true!). I'm defining Wild Weather as weather that is not, or cannot be, managed by ponies.
So far, the only confirmed places of Wild Weather are the Everfree Forest and the Frozen North.

Now, ponies have described the Wild Weather of the Everfree as 'unnatural', which implies that weather management is the norm across all of Equestria. However, this phrase was said by, Applejack, I believe? A pony from the town closest to Canterlot, in the very middle of the country. In the same episode, Bridle Gossip, it was also revealed that the ponies there didn't even know what a zebra was. So, even though Ponyville ponies are used to weather management, it's also feasible to assume that in places that aren't Equestria, the weather might not be managed by the native people.

So, would the weather in unmanaged places act as you'd expect from a weather system without the Coriolis Effect? Or would magical interference change things? Zap Apples, for example, have a strange magic that changes the weather around their field (winds and storms), and influences... I think it was crows? So maybe the wild Zap Apples make similar things happen in the Everfree. And maybe the Zap Apples aren't the only ones.

Suddenly it seems that Wild Weather is a whole lot more unpredictable, a whole lot more fun. It makes sense for ancient ponies to have adapted their magic to tune in to the magic of the Weather, in order to manipulate and benefit themselves. How the pterippoi pegasi came to be, I suppose.

So, what are your thoughts on the weather of the MLP world?