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Worldbuilding For Rune's World (Also various others)
Okay, the water levels are lower there than here - south of about Marseille is swamp till you get to the sea, lots of Doggerland is still above water and Rune's country isn't dry land in our world.

But it's not colder.

That leads me to believe that there's less water overall...

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There might be more ice / glaciers? Or the oceans might be deeper?

I'm trying to put a finger on why "less water" seems problematic, but ... mumble mumble weather patterns flailing.

If there was more ice, would it cover more area and be colder?

Deeper oceans in places we haven't seen might work....

We might be entering the realm of in-world scientific debate. Ooooh!

Less water means drier continental interiors and less rain over-all... which if it's that much less, could lead to a run-away desert scenario... [think Dune].

The surface area of the water matters, too. If there's more land in some areas because the water level is lower, less water surface will be available to put moisture into the air, unless there's more water coverage somewhere else (further away, again different weather patterns). (And presumably water area does not exchange for ice coverage, which would put a lot less moisture into the air.)

This sounds like something I've been working on in climate modelling.

Ok, hypothesis, the sea levels are lower... if the total volume of water is the same, then it's locked up some place else. The local climate could stay within the boundaries we're used to, if the Greenland ice cap was thicker, or the North American / Canadian ice cap stayed intact.

The latter hypothesis is more probable as the ice cap failed due to a combination of events... specifically a very build up of melt water creating a mini fresh-water sea in the interior of the ice cap, and a magnitude 7 or 8 earthquake in just the right [or wrong] place to crack the the ice dam, leading to the St Lawrence break out, so-named because that's what gouged out the great lakes and the sea way. Once the interior sea drained [it took 23 years] the local climate grew warmer thanks to the increase in albedo and melted the remaining ice cap in run-away feedback loop.

If either of those events didn't happen, then the 'Great Lake' would still be intact, changing North America's climate, [for the cooler and wetter] but also meaning that the global sea levels would be between 1 and 3 metres lower. [yeah it holds that much water].

Although, that big a body of fresh water would probably means it rains more in Europe..

Edited at 2016-05-20 11:55 am (UTC)

I'm beginning to think that the Great Lakes might mean something quite different in this world.

Now, can I blame it on the Atlanteans?

Edited at 2016-05-20 11:36 pm (UTC)

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