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28th of February 2015


The basics are already functional, at this point it is mostly about finetuning the algorithm and adjusting the variables to make the simulation realistic. The first column shows date in DD.MM., then temperature in celcius, rain stats, and snow thicknes in cm. The last column is for water: positive values are water temperature in celcius, negative values are ice thickness in cm.

Here we see how the water already freezes at the end of October, then the heavy rainfall destroys the ice, until it gradually freezes again at 17th of November.

Would local terrain ever come into play with weather etc? or is that something near impossible to implement? Im not so good when it comes to programming etc but weather patterns do interest me...somehow aha looking good though my friend.

What kind of terrain -> weather relations are you thinking of?

It first calculates a general reference data for whole year, which is then modified by latitude - the norhter you go, the colder it gets. So, at this level the location affects the weather. More spesific relations could be possible to program, although my first goal is just to make a fully functional basic version first. So, if you have some good ideas I'd be interested to hear - they might then get implemented later on, depending on how the development goes.

(After the weather engine I got two or three other programming tasks waiting to be done...)

I think the main weather / terrain related thing I was thinking of was Foehn Wind and Rain shadow effects, Id go all out and type it up but I'd confuse myself too much so I shall snip it from the internet aha

'Rain Shadow - As air moves against a mountain range, it rises. As it rises it cools down. The cooling causes water vapor to condense and rain to form. As it passes over to the other side of the mountain, the air is more dry. It is characteristic of large mountain ranges to have wet and dry sides. For instance, the Sierra Nevada mountain range in California is relatively wet on the western, ocean-facing side and dry on its interior, eastern side. The wind created as the atmosphere rushes down the dry side of a mountain range create what are called "foehn-type" winds, such as the Santa Anas in Southern California. Many desert climates around the world are located beyond the dry sides of mountain ranges.'

Though I'm not sure as to how that sort of weather related issue would arise in Finland as I've not see the mountain ranges nor do I know of the altitude of them, More research is needed myself! :D

Foehn Wind is pretty much the same thing 'Winds of this type are also called "snow-eaters" for their ability to make snow melt or sublimate rapidly. This snow-removing ability is caused not only by warmer temperatures, but also the low relative humidity of the air mass having been stripped of moisture by orographic precipitation coming over the mountain(s).'

All this has blown my head...I havn't looked into weather for a while :)

Ah, OK! I guess our terrain is generally speking so flat that we don't have that kind of weather effects. But the mountains of Norway and Sweden do. Well, UnReal World map doesn't have anything corresponding to Sweden and Norway, but I think I could still make it so that wind blowing from west will sometimes make the weather warmer. Also, in the winter wind from east means colder air, but in the summer it means warmer air. Thing like that are going to be implemented.

Considering Finnish weather, I guess large bodies of water affect the local terrain. In the autumn the inland air cools down faster, but coastal areas cool down slower. I don't yet know if I will simulate that in the first version of the weather engine.

I suppose the water bodies would have an effect to be fair, cold sumps trapping freezing fog? I haven't read up much on Finnish geological history, Iron Age weather could have been so much different its mad to think! but something I may dabble in for a good read, knowledge is power as they say :)

Really looking forward to seeing how UnReal develops, Keep it up Brother and keep smiling aha

Re: Iron Age weather: Yes, I remember reading somewhere that the world was much warmer around 1000AD, to the point where Greenland was actually green, lol.


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