HiRO-ACEv2 simulates extreme weather at 3 km resolution for a fraction of the cost

What happened

Ai2 introduced HiRO-ACEv2, an updated climate emulator that generates global 3 km rain, wind, and pressure data at about 1/300th the cost of X-SHiELD. Given coarsened X-SHiELD data, its HiROv2 downscaling model matches high-resolution statistics to within 3%, even for events occurring once in a million data points. The system currently works only with ACE tuned to match X-SHiELD and cannot yet generate high-resolution data for other climates; downloadable models, tutorial notebooks, and a web demo are available.

The story so far

Ai2 introduced HiRO-ACEv2, an updated climate emulator that it says generates global rain, wind, and pressure data at 3 km resolution for about 1/300th the cost of X-SHiELD; downloadable models, tutorial notebooks, and a web demo are available. Given coarsened data from X-SHiELD, Ai2 says the system’s HiROv2 downscaling model reproduces high-resolution statistics to within 3%, including for extreme events occurring once in a million data points. Its scope remains tied to that training simulation: HiRO works only with the version of ACE tuned to match X-SHiELD and cannot yet generate high-resolution data for other climates. The web demo shows pre-generated precipitation, wind, and sea-level pressure outputs from HiROv1 and HiROv2 alongside X-SHiELD output.

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