A drained world
I'm not sure if this is in the right forum section, as I'm not posting a map in this post but more just asking for resources and opinions on a world-map idea.
As ive been thinking about my geofictional world, Ive come up with an interesting idea for a post-apocolyptic era which drastically changes the world. A drastic event happens where a very large meteor strikes the planet, and somehow (I realize this part doesn't make any scientific sense but Im willing to overlook that) a large majority of the worlds moisture escapes the atmosphere. 90% of the worlds oceans basically vanish. This event kills a large majority of life on the planet, but some humans do manage to survive through it. There is a "dark age" after the cataclysm that covers the world in dark clouds for several years. Once the clouds disperse, the majority of the world is covered in arid desert (from a lack of moisture and global heating) with some remaining seas scattered about the size of the black or caspian sea. Around some of these seas (depending on lattitude) would be small but somewhat lush regions of land, due to the nearby water. Assuming the water from the sea evaporates and is only able to travel a short distance before raining, creating rivers feeding back to its sea, this would give the surrounding areas fresh water and ability for life to thrive.
This was my idea, but I have absolutely no idea how sensible it is. This is a fantasy world, so the cataclysm part doesnt need to make a huge amount of sense (in my opinion) but if the earth was drained of most of its water, what would the climate be like? Is most of the world covered in arid desert but with a few temperate lush lands around small seas even plausible? The new "seas" would be at a very low altitude, and most seas are much lower than the majority of the surrounding desert. Does this make any sense, since the higher altitude, the colder it gets? What about ice on the highest altitudes and polar caps? I would prefer if there wasnt any ice left on the world, making the sealands the only place to escape the desert (makes for interesting story elements and conflicts).
Again, this is all fantasy. But I am trying to make it seem atleast somewhat plausible. Anyone have any thoughts on this?
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