This WIP looked a bit cool so I thought I'd post it. Green is slightly less guesswork or invention than purplse. The faded out Earth map is a good guide to eyeball climate, so I can know where to focus the more detailed write or draw ups.
A - I think this is desert, but we'll see how the summer/winter rainfall patterns look. MacKenzie River region is still going to be watered.
B - Again another desert, this time I think it gets one big rainy season per year, but I'll have to figure that out to be sure.
C - Lake Chad? The Mediterranean could produce ice-cap melt-water rivers that we just don't have on our planet, and that could do all kinds of neat things in the Sahara, Turkey, the Caucasus, and European Russia.
D - I think the Nile could reverse itself and then flow back down the Red Sea. I hope this is true because that would be cool. Also it's looking like the Dead Sea might be the deepest freshwater lake on the planet! Spooky...
E - India is a mystery at the moment. By eye it looks like it could get similar monsoons to our world.
F - All the rivers north of the Urals will flow into this area.
G - Tropical near the coasts, deserts just inland.
1 - Right now this place looks like it could get conquered by adventurers or trading companies from West Africa. From it's location, it will later be a wealthy trading and naval power.
2 - My gut is telling me that the Niger River is dominated by one hydraulic empire, whose influence rests on canals branching off the river, and trade from the coast of *Nigeria, which will come to dominate a more diverse group of states along the coast, and expand east to the Nile or maybe Arabia.
3- Could have British Isles climate.
4 - This location seems good for trade. But if this means they're conquered quickly and become independent on the trade profits, or if they become wealthy on trade profits and can remain independent, I don't know.
5 - What happens here??? The Lena-Amur region could be equivalent to China over here. They have pressure from Central Asia and Siberia, which may be raiders of some sort; but they are also adjacent to the cataract of world trade, and likely with a land border.