# New Weather Simulator: Almost Perfect! 🌤

## Метаданные

- **Канал:** Two Minute Papers
- **YouTube:** https://www.youtube.com/watch?v=mY2ozPHn0w4
- **Дата:** 15.01.2022
- **Длительность:** 5:29
- **Просмотры:** 111,357
- **Источник:** https://ekstraktznaniy.ru/video/13695

## Описание

❤️ Check out Perceptilabs and sign up for a free demo here: https://www.perceptilabs.com/papers

📝 The paper "Weatherscapes: Nowcasting Heat Transfer and Water Continuity" is available here:
http://computationalsciences.org/publications/amador-herrera-2021-weatherscapes.html

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## Транскрипт

### Segment 1 (00:00 - 05:00) []

Dear Fellow Scholars, this is Two Minute  Papers with Dr. Károly Zsolnai-Fehér. You can immediately start holding on to your  papers, because today we are going to take   a journey around the globe and simulate the  weather over the mountainous coast of Yucatan,   a beautiful day in the Swiss Alps, and  a searing day in the Sahara desert. Yes, from now on all of this is possible  through the power of this new paper. Just   to showcase how quickly things are improving  in the wondrous land of computer graphics,   first, we were able to simulate a  tree. And then, researchers learned   to then simulate an entire forest. But  that’s not all, then, more recent papers   explore simulating an entire ecosystem for  thousands of years. Now that’s something. So, are we done here? What else is there to do?   Well, this new work finally helps us simulating   weatherscapes, and it can go from  a light rain to a huge snowstorm. Now, previous methods were also  able to do something like this,   but something was missing. For instance,  here, this looks great, but, the buoyancy part   is just not there. Why? Well, let’s look at  the new method and find out together! Yes,   the new work simulates the microphysics of  water, which helps modeling phase changes and   buoyancy properly. You are seeing the buoyancy  part here. That makes a great difference. So, what about phase changes? Well,  look at this simulation. This is also   missing something. What is it missing? Well, the  simulation of the Foehn effect! What this means is   a phenomenon where condensed warm air approaches  one side of the mountain, and something happens…or   to be more exact, something doesn’t happen.   In reality, this should not get through.    So, let’s see the new simulation! Oh yes!   It is indeed stuck. Now that’s what I call   a proper simulation of heat  transfer and phase changes. Bravo. And here you also see another example of a proper  phase change simulation see where the rainwater   flows down the mountain to the ground, and the  new system simulates how it evaporates, wait for   it…yes! It starts to form new clouds! So good. And it can simulate many more amazing  natural phenomena beyond these in a way   that resembles reality quite well. My  favorites here are the mammatus clouds,   a phenomenon where the air descends and  warms, creating differences in temperatures   in the cloud, and this is what the  instability it creates looks like,   and, oh my! The hole punch! This can emerge due  to the air cooling rapidly, often due to a passing   aircraft. All of these phenomena require the  simulations of the microphysics of water. Bravo! So, microphysics huh? That  sounds computationally expensive,   so, let’s pop the question - how long do we have  to wait for a simulation like this? Are you seeing   what I am seeing? How is that even possible? This  runs easily interactively, with approximately   10 frames per second. It simulates this  and this and all of these variables   and it can do all this ten times every  second? That is insanity. Sign me up! Now, one more thing. Views are not everything. Not  even close. However, I couldn’t ignore the fact   that as of the making of this video  only approximately 500 people watched   the original paper video. I think that this is  such a beautiful work, everyone has to see it.    Before Two Minute Papers, I was just running  around at the university with these papers in   my hand trying to show them to the people I know.   And today, this is why Two Minute Papers exists,   and it can only exist with such an amazing and  receptive audience as you are. So thank you so   much for coming with us on this glorious journey,  and make sure to subscribe and hit the bell icon   if you wish to see more outstanding works like  this, we have a great deal more coming up for you.

### Segment 2 (05:00 - 05:00) [5:00]

Thanks for watching and for your generous  support, and I'll see you next time!