Cara Santa Maria

speaker

5,033 appearances 14 recordings 1 series first heard May 2026 last heard 3d ago

Cara Santa Maria’s voice in public audio — every appearance, attributed to the second.

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recordings per month · last 12 months

Recordings per month over the last 12 months — 14 in all, peaking in Aug 2026 with 4.

Appearances

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The Skeptics' Guide to the Universe · The Skeptics Guide #1063 - Nov 22 2025 podcast

Yeah, icosahedral, but ICO is like in capitals for some reason. matched

I see. matched

Yeah, so I'm not sure why, but the icosahedral non-hydrostatic model was developed as the German Weather Service, or sorry, by the German Weather Service and the Max Planck Institute for Meteorology. matched

That is, I guess, the data that they used or the kind of basic modeling that they built upon. matched

The big difference here is scale. matched

So in order to get that 1.25 kilometer scale, they're estimating that basically if you imagine like a grid covering the surface of the earth, that that grid is composed now of 336 million cells. matched

They doubled it because then they kind of modeled atmospheric cells and they're mapped directly above the ground-based ones. matched

So we're looking at a model of around 672 million calculated cells, which they estimate translates to like... matched

one trillion what they're calling degrees of freedom which i know is different depending on the statistics that you're talking about but here what they're referring to when they talk about a trillion degrees of freedom is the total number of values it's calculating so it obviously needs a supercomputer to run this and that's where this big new bit comes in they used matched

20,480 of the new NVIDIA GH200 superchips to be able to model 145.7 Earth days in a single day. matched

So I had to look up what a GH200 super chip is because I was like, what does GH stand for? matched

Is that like gigahertz? matched

What does that actually mean? matched

It's not. matched

That was really confusing to me. matched

The number and the letters have nothing to do with computing power. matched

So the NVIDIA GH200 is also called the Grace Hopper. matched

So GH stands for Grace Hopper. matched

It's, you know, to honor her. matched

And 200 is just their name and convention. matched

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