{"artifact_id":"L1-420","layer":"L1","title":"Sea Ice Thermodynamic-Dynamic Inversion","domain":"Environmental Science","sub_domain":"Cryosphere modeling","physics_fingerprint":{"L_DAG":3.5,"title":"Sea Ice Thermodynamic-Dynamic Inversion","domain":"Environmental Science","carrier":"photon","primitives":["S.passive_microwave.brightness_temp","D.space","O.chi2.sia_sie"],"sub_domain":"Cryosphere modeling","noise_model":"measurement_gaussian","problem_class":"parameter_estimation","solution_space":"sea_ice_state_vector","difficulty_delta":5,"integration_axis":"sea_ice_extent","sensing_mechanism":"passive_microwave_sea_ice"},"observable_profile":{"metric":"sea_ice_concentration_RMSE_percent","regime":"Existence of the recovered sea_ice_state_vector is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 200); melt_pond_fraction dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Measurement gaussian sets the irreducible data-fidelity floor.","secondary":"thickness_RMSE_m"},"size_tiers":{"center_spec":{"omega":{"snow_depth_cm":20,"N_swath_pixels":10000,"melt_pond_fraction":0.0,"ice_concentration_percent":80},"input_format":"measurement_only","problem_class":"parameter_estimation","forward_operator":"passive_microwave_sea_ice","epsilon_fn_center":"5 sea_ice_concentration_RMSE_percent"},"omega_bounds":{"snow_depth_cm":[0,100],"N_swath_pixels":[1000,1000000],"melt_pond_fraction":[0.0,0.5],"ice_concentration_percent":[0,100]},"epsilon_bounds":{"sea_ice_concentration_RMSE_percent":[1,20]},"allowed_problem_classes":["parameter_estimation"],"allowed_omega_dimensions":["N_swath_pixels","ice_concentration_percent","snow_depth_cm","melt_pond_fraction"],"allowed_forward_operators":["passive_microwave_sea_ice"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":5000,"metric":"sea_ice_concentration_RMSE_percent"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x83fac7ae18b99e3c24a44877225938126d15317b2a89d83193959c8f88a5b8b0","chain_tx_hash":"0x4a3e567baaabd23c365a21182d55b091546ab48d9703ec24753f92fe3fa18cef","chain_block":41555239}