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2026-04-23 19:48:17
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6,647,249,545,382,099,000,000,000,000B
202,793,067,443,053,600,000,000,000,000B
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2026-04-23T19:31:13
202,793,067,443,053,600,000,000,000,000,000,000,000
{ "reference": "(n_runs, n_ref, 3)", "coarse": "(n_runs, n_coarse, 3)", "nudged": "(n_runs, n_coarse, 3)", "ensemble": "(n_runs, ensemble_size, n_coarse, 3)", "state_order": [ "z1", "z2", "z3" ], "note": "Within each run, all trajectories share the same initial state; across runs, initial stat...
{ "cutoff_time": 0, "ref_start_index": 0, "coarse_start_index": 0, "rule": "saved data starts at max(spinup_time, analysis_time)" }
{ "time_reference": [ 170000 ], "time_coarse": [ 170000 ], "initial_states": [ 2, 3 ], "reference": [ 2, 170000, 3 ], "coarse": [ 2, 170000, 3 ], "nudged": [ 2, 170000, 3 ], "ensemble": [ 2, 16, 170000, 3 ] }
{ "t_span": [ 0, 510 ], "initial_state": [ 0.1, -1, 0.1 ], "n_ref": 170000, "coarse_factor": 1, "spinup_time": 0, "tau": 8, "n_runs": 2, "ensemble_size": 16, "sigma": 0.00001, "analysis_time": 0, "init_state_std": [ 0.02, 0.02, 0.02 ], "a1": 2, "a2": 2, ...
2026-04-23T19:43:19
6,647,249,545,382,099,000,000,000,000,000,000,000
{ "reference": "(n_runs, n_ref, 3)", "coarse": "(n_runs, n_coarse, 3)", "nudged": "(n_runs, n_coarse, 3)", "ensemble": "(n_runs, ensemble_size, n_coarse, 3)", "state_order": [ "z1", "z2", "z3" ], "note": "Within each run, all trajectories share the same initial state; across runs, initial stat...
{ "cutoff_time": 0, "ref_start_index": 0, "coarse_start_index": 0, "rule": "saved data starts at max(spinup_time, analysis_time)" }
{ "time_reference": [ 170000 ], "time_coarse": [ 170000 ], "initial_states": [ 2, 3 ], "reference": [ 2, 170000, 3 ], "coarse": [ 2, 170000, 3 ], "nudged": [ 2, 170000, 3 ], "ensemble": [ 2, 16, 170000, 3 ] }
{ "t_span": [ 0, 510 ], "initial_state": [ 0.1, -1, 0.1 ], "n_ref": 170000, "coarse_factor": 1, "spinup_time": 0, "tau": 8, "n_runs": 2, "ensemble_size": 16, "sigma": 0.000001, "analysis_time": 0, "init_state_std": [ 0.02, 0.02, 0.02 ], "a1": 2, "a2": 2, ...
2026-04-23T19:48:17
192,163,223,548,956,600,000,000,000,000,000,000,000
{ "reference": "(n_runs, n_ref, 3)", "coarse": "(n_runs, n_coarse, 3)", "nudged": "(n_runs, n_coarse, 3)", "ensemble": "(n_runs, ensemble_size, n_coarse, 3)", "state_order": [ "z1", "z2", "z3" ], "note": "Within each run, all trajectories share the same initial state; across runs, initial stat...
{ "cutoff_time": 0, "ref_start_index": 0, "coarse_start_index": 0, "rule": "saved data starts at max(spinup_time, analysis_time)" }
{ "time_reference": [ 170000 ], "time_coarse": [ 170000 ], "initial_states": [ 2, 3 ], "reference": [ 2, 170000, 3 ], "coarse": [ 2, 170000, 3 ], "nudged": [ 2, 170000, 3 ], "ensemble": [ 2, 16, 170000, 3 ] }
{ "t_span": [ 0, 510 ], "initial_state": [ 0.1, -1, 0.1 ], "n_ref": 170000, "coarse_factor": 1, "spinup_time": 0, "tau": 8, "n_runs": 2, "ensemble_size": 16, "sigma": 0.000005, "analysis_time": 0, "init_state_std": [ 0.02, 0.02, 0.02 ], "a1": 2, "a2": 2, ...

ExtremeEventSensor

This dataset accompanies the NeurIPS 2026 paper Mechanism-Aware Ensemble Conditioning for Data-Limited Emulation of Extreme Events.

TLDR: Small ensembles of perturbed, low-cost simulations reveal locally unstable directions in the dynamics. We use that information to guide learned corrections to coarse trajectories.

What’s included

  • LowDim: Trajectories from a three-dimensional nonlinear system exhibiting bursts, including reference, coarse, nudged, and perturbed ensemble simulations.
  • QG: Data from a two-layer quasigeostrophic model, including upper and lower streamfunction with additional topography. Includes fields from reference, coarse, nudged, and ensemble simulations.

For a short demonstration, see the blog post. Full details about methods and examples are in the paper, and the accompanying code is on GitHub.

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Paper for thisisisi/ExtremeEventSensor