[WIP]: A new RPG World

[SteffenBrand]

Hey you all! I recently studied basics about climate, winds and weather (mainly from here, but with additional other sources). This is the first time I'm doing this so there are probably some mistakes. I sketched in the largest / most important mountains, the climatic zones and the winds according to the infos I got from the link above. I'd be very happy if someone who understands more about this would check this for mistakes. Every input is really appreciated. =)

I made this for winter first, I guess the directions of the wind will change in summer. I also made the land/water gray so that you can read the infos easier.

[Deadshade]

Hey you all! I recently studied basics about climate, winds and weather (mainly from here, but with additional other sources). This is the first time I'm doing this so there are probably some mistakes. I sketched in the largest / most important mountains, the climatic zones and the winds according to the infos I got from the link above. I'd be very happy if someone who understands more about this would check this for mistakes. Every input is really appreciated. =)

I made this for winter first, I guess the directions of the wind will change in summer. I also made the land/water gray so that you can read the infos easier.

The intent to get this right honors you
First things first - it is the atmospheric circulation that causes low and high pressures zones and not the other way round.
That's why the very first thing to learn are basics of atmospheric circulation (AC).

The engine of the AC are not pressures but temperatures.
Basically a planet heats too much at equator and the most efficient way to evacuate the heat is to transport it to the coldest place, e.g to the poles.
This evacuation will happen in a succession of cells (3 on Earth) where each one will get the equatorial heat nearer to the poles.

Then the second important point is the Coriolis force. The Coriolis force is due to the planet's rotation and as it is a vectorial product, it deviates N/S travelling air to W or E.
If we take the same rotation sense like for Earth then :
In N hemisphere air travelling to N is deviated to East and travelling to S is deviated to West.
In S hemisphere air travelling to N is deviated to West and travelling to S is deviated to East.
This deviation is also responsible for anti clockwork rotation around low pressures and clock work around high pressures.
Also this force is not constant, it is 0 at equator and maximum at pole. This means that winds in temperate régions will be dominantly eastelies or westerlies while near equator there is no privileged direction.

These 2 fundamental points above are totally independent of winter or summer so that you can define an AC for the whole planet regardless of season.
This is an advantage because small scale climatic features (especially monsoons) have sometimes a seasonal variability - wet, hot air blows from ocean to continent in summer and dry cold air the other way in winter.
Monsoons are not systematic and finding where would be some and where wouldn't is beyond the scope of this post.

In the joined picture I show how the AC works on your planet (assuming the same rotation as the Earth).
On the right edge you have the schematic of the 3 cells - Hadley, Ferrel and polar.
It would be the same for any imaginary planet. What could change is the number of cells because it depends on the size and rotation speed of the planet but the principle of polewards energy transport is valid everywhere.
On the map I have shown the ground level circulation of each cell because this is what matters for the biomes.

Last I have sketched some biomes :
- light green tropical forest
- yellow hot dry desert
- light blue very humid rainy temperate climate
From these one can infer other intermediate biomes like bush, savannah, dry and humid temperate regions etc.