{"artifact_id":"L1-287","layer":"L1","title":"Glacial Isostatic Adjustment (GIA) — post-glacial rebound","domain":"Geophysics","sub_domain":"Viscoelastic Earth + ice-load history","physics_fingerprint":{"L_DAG":3.5,"title":"Glacial Isostatic Adjustment (GIA) — post-glacial rebound","domain":"Geophysics","carrier":"mechanical","primitives":["L.load_history","L.viscoelastic_response","L.sea_level_eqn","int.temporal"],"sub_domain":"Viscoelastic Earth + ice-load history","noise_model":"gaussian","problem_class":"nonlinear_inverse","solution_space":"vertical_uplift_and_viscosity","difficulty_delta":5,"integration_axis":"temporal","sensing_mechanism":"gps_sea_level"},"observable_profile":{"metric":"uplift_rel_error_percent","regime":"Conditional stability; mismatch parameters dominate at Omega bounds.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"N_gps":100,"SNR_dB":25,"N_layers":20,"N_load_history":10000,"ice_history_error":0.1,"mantle_viscosity_error":0.1,"lithosphere_thickness_error":0.1},"input_format":"measurement_only","problem_class":"gia","forward_operator":"gia_forward","epsilon_fn_center":"2.0"},"omega_bounds":{"N_gps":[10,10000],"SNR_dB":[0,40],"N_layers":[5,1000],"N_load_history":[100,1000000],"ice_history_error":[0.0,0.3],"mantle_viscosity_error":[0.0,0.5],"lithosphere_thickness_error":[0.0,0.3]},"epsilon_bounds":{"uplift_rel":[0.2,20.0]},"allowed_problem_classes":["gia"],"allowed_omega_dimensions":["N_load_history","N_layers","N_gps","SNR_dB","ice_history_error","mantle_viscosity_error","lithosphere_thickness_error","ice_history_error","mantle_viscosity_error","lithosphere_thickness_error"],"allowed_forward_operators":["gia_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":560,"metric":"uplift_rel_error_percent"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x863057f22fae9ae7cb15c4def70a498df0d05d5d144f09d1310bb3dc61251aed","chain_tx_hash":"0x30d68e14816d0e3f12c9d56afe03ae38d38062c2ffc32ad05b3d46061ac6ba92","chain_block":41554065}