WebGCM

A global climate model that runs in the browser. The repository keeps the name of the geodesic grid the model is built on.

Live at https://gcm.echorelay.net/

• Climate model — a hydrostatic atmosphere on a geodesic C-grid with moist physics, a two-layer ocean, sea ice, snow and real continents with terrain, integrated on the GPU through WebGPU. Design notes in docs/c-grid-dynamical-core.md, plans in docs/roadmap.md.
• Geodesic grid — the original geodesic polyhedron viewer (Three.js).
• Synoptic charts — pressure-level charts drawn from saved model states.

To run locally, serve the repository with python3 httpd.py and open http://localhost:8000/. The model needs the page cross-origin isolated (Cross-Origin-Opener-Policy: same-origin and Cross-Origin-Embedder-Policy: require-corp), which that server and the _headers file for Cloudflare or Netlify Pages both provide. npm test runs the test suite.