Technical milestone reached: global earth system simulations with 1.2 km resoln

&quot;I don&#x27;t know, Timmy, being God is a big responsibility&quot; <a href="https:&#x2F;&#x2F;qntm.org&#x2F;responsibility" rel="nofollow">https:&#x2F;&#x2F;qntm.org&#x2F;responsibility</a> , Topic relevant short scifi on Earth simulation.

Being curious about the implementation language. Viewing the code is not easy.<p>If you guess Fortran, you might be right:<p>(different ICON Project) &quot;The infrastructure, ICON-Land, for this ICON-A land component has been newly designed in a Fortran2008 object-oriented, modular, and flexible way.&quot;<p><a href="https:&#x2F;&#x2F;mpimet.mpg.de&#x2F;fileadmin&#x2F;publikationen&#x2F;Reports&#x2F;WEB_BzE_135.pdf" rel="nofollow">https:&#x2F;&#x2F;mpimet.mpg.de&#x2F;fileadmin&#x2F;publikationen&#x2F;Reports&#x2F;WEB_Bz...</a><p>Fortran alive and kicking:<p><a href="https:&#x2F;&#x2F;developer.nvidia.com&#x2F;cuda-fortran" rel="nofollow">https:&#x2F;&#x2F;developer.nvidia.com&#x2F;cuda-fortran</a>

The article talks about 1.2km horizontal resolution. Is it a 3d grid? If so what is the vertical resolution? Or is the vertical dimension integrated within 2d boxes?

How does such a simulation work?<p>Eg how do hou predict the temperature at x,y? Is it ground type, water, sand?Altitude? Neighboring values thereof?<p>What are the inputs? Do you give it a starting point and apply it to a bunch of elements like some giant automata like game of life?<p>Some kind of finite element analysis thing?<p>So many questions.

This is fantastic - would be really exciting to see this level of resolution making its way to global operational weather forecasts (currently at ~10km).

This is for short term weather prediction or long term climate modelling? The 2.5 simulated days per day points into the short term direction.

The real key of this story is in the &quot;simulating — rather than parameterising&quot;.

This sounds alot less than Nvidia&#x27;s FourCastNet?<p><a href="https:&#x2F;&#x2F;resources.nvidia.com&#x2F;en-us-fleet-command&#x2F;watch-27?xs=423538" rel="nofollow">https:&#x2F;&#x2F;resources.nvidia.com&#x2F;en-us-fleet-command&#x2F;watch-27?xs...</a><p>How do these two compare?

I have only one question. Does this mean that we are getting closer to a cloud-hosted ultimate map for games like Call of Duty and Ace Combat?<p>I want to dogfight over Ohio, land at Offutt to play Warzone in Omaha, then take a MRAP and drive to NY.

&gt;throughput of 2.5 simulated days per day Will need to be at least 10x faster to be operationally useful.

is fixed resolution really the way to go? I&#x27;d imagine big patches of the ocean and deserts being modeled as single nodes being way more efficient without compromising fidelity.

Why did they target 1.2km instead of 1? Or any other number?

How is this going to change seasonal-scale forecasts?

1.25 ~ 1.3: Round half to odd prefers preserving the existing scale of tie numbers avoiding out-of-range results when possible for numeral systems of even radix.