{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:V5WFPK3G2ITCG3ULCJ37CHPT23","short_pith_number":"pith:V5WFPK3G","canonical_record":{"source":{"id":"2603.12449","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2026-03-12T21:00:26Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"05142457d0a38f5dd794f207d7475e9485ea7f510f90fb4af7ccdda2917fe17c","abstract_canon_sha256":"e9a4d47c6e877704a79aab4acde2e33dd946b2f637468c44a15b355e725c5e65"},"schema_version":"1.0"},"canonical_sha256":"af6c57ab66d226236e8b1277f11df3d6e33ff12142c59c3fe69086c6c5df27aa","source":{"kind":"arxiv","id":"2603.12449","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.12449","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"2603.12449v1","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.12449","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"V5WFPK3G2ITC","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"pith_short_16","alias_value":"V5WFPK3G2ITCG3UL","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"pith_short_8","alias_value":"V5WFPK3G","created_at":"2026-07-14T01:22:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:V5WFPK3G2ITCG3ULCJ37CHPT23","target":"record","payload":{"canonical_record":{"source":{"id":"2603.12449","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2026-03-12T21:00:26Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"05142457d0a38f5dd794f207d7475e9485ea7f510f90fb4af7ccdda2917fe17c","abstract_canon_sha256":"e9a4d47c6e877704a79aab4acde2e33dd946b2f637468c44a15b355e725c5e65"},"schema_version":"1.0"},"canonical_sha256":"af6c57ab66d226236e8b1277f11df3d6e33ff12142c59c3fe69086c6c5df27aa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-14T01:22:05.278436Z","signature_b64":"5R2CLUGL8XDhJy+gdYWslLH4L5GTyX9mIAu874RYujoGZBAau4p5RbED3wOeRgngWrruozzIEFNR9syirt77BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"af6c57ab66d226236e8b1277f11df3d6e33ff12142c59c3fe69086c6c5df27aa","last_reissued_at":"2026-07-14T01:22:05.277549Z","signature_status":"signed_v1","first_computed_at":"2026-07-14T01:22:05.277549Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2603.12449","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-14T01:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nKHpk7Lg7kCbfS7Nec3NQRdzsRBxtfoGeQP+ZJ/61DDBTCdnNBxNyQg7FeQhhFGwmfly/sPIJ2DyZ440DswJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T03:57:55.011393Z"},"content_sha256":"d5e1cf6f9e45e2b1e5ce4e58675520e87a722a9d1e541fd7c4a61288acc9e77a","schema_version":"1.0","event_id":"sha256:d5e1cf6f9e45e2b1e5ce4e58675520e87a722a9d1e541fd7c4a61288acc9e77a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:V5WFPK3G2ITCG3ULCJ37CHPT23","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FloeNet: A mass-conserving global sea ice emulator that generalizes across climates","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"physics.ao-ph","authors_text":"Adam Subel, Alistair Adcroft, Bill Hurlin, Chris Bretherton, Elynn Wu, James Duncan, Laure Zanna, Mitchell Bushuk, Oliver Watt-Meyer, Spencer K. Clark, William Gregory","submitted_at":"2026-03-12T21:00:26Z","abstract_excerpt":"We introduce FloeNet, a machine-learning emulator trained on the Geophysical Fluid Dynamics Laboratory global sea ice model, SIS2. FloeNet is a mass-conserving model, emulating 6-hour mass and area budget tendencies related to sea ice and snow-on-sea-ice growth, melt, and advection. We train FloeNet using simulated data from a reanalysis-forced ice-ocean simulation and test its ability to generalize to pre-industrial control and 1% CO2 climates. FloeNet outperforms a non-conservative model at reproducing sea ice and snow-on-sea-ice mean state, trends, and inter-annual variability, with volume "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.12449","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2603.12449/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-14T01:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1fqXuEjRSZPn6pLZ3F62jWQaCBRBzy4bmV5wqrofxEXgVkhwL4GAL+/Tfwvt0NRKAQ+7BigrMrE2hR+0RyUvBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T03:57:55.012366Z"},"content_sha256":"7d6a16a2017cdf8f596d3d36213496761f5a1a2faf5c9aad73399cd0f3cc2a45","schema_version":"1.0","event_id":"sha256:7d6a16a2017cdf8f596d3d36213496761f5a1a2faf5c9aad73399cd0f3cc2a45"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V5WFPK3G2ITCG3ULCJ37CHPT23/bundle.json","state_url":"https://pith.science/pith/V5WFPK3G2ITCG3ULCJ37CHPT23/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V5WFPK3G2ITCG3ULCJ37CHPT23/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-10T03:57:55Z","links":{"resolver":"https://pith.science/pith/V5WFPK3G2ITCG3ULCJ37CHPT23","bundle":"https://pith.science/pith/V5WFPK3G2ITCG3ULCJ37CHPT23/bundle.json","state":"https://pith.science/pith/V5WFPK3G2ITCG3ULCJ37CHPT23/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V5WFPK3G2ITCG3ULCJ37CHPT23/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:V5WFPK3G2ITCG3ULCJ37CHPT23","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e9a4d47c6e877704a79aab4acde2e33dd946b2f637468c44a15b355e725c5e65","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2026-03-12T21:00:26Z","title_canon_sha256":"05142457d0a38f5dd794f207d7475e9485ea7f510f90fb4af7ccdda2917fe17c"},"schema_version":"1.0","source":{"id":"2603.12449","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.12449","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"2603.12449v1","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.12449","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"V5WFPK3G2ITC","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"pith_short_16","alias_value":"V5WFPK3G2ITCG3UL","created_at":"2026-07-14T01:22:05Z"},{"alias_kind":"pith_short_8","alias_value":"V5WFPK3G","created_at":"2026-07-14T01:22:05Z"}],"graph_snapshots":[{"event_id":"sha256:7d6a16a2017cdf8f596d3d36213496761f5a1a2faf5c9aad73399cd0f3cc2a45","target":"graph","created_at":"2026-07-14T01:22:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2603.12449/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce FloeNet, a machine-learning emulator trained on the Geophysical Fluid Dynamics Laboratory global sea ice model, SIS2. FloeNet is a mass-conserving model, emulating 6-hour mass and area budget tendencies related to sea ice and snow-on-sea-ice growth, melt, and advection. We train FloeNet using simulated data from a reanalysis-forced ice-ocean simulation and test its ability to generalize to pre-industrial control and 1% CO2 climates. FloeNet outperforms a non-conservative model at reproducing sea ice and snow-on-sea-ice mean state, trends, and inter-annual variability, with volume ","authors_text":"Adam Subel, Alistair Adcroft, Bill Hurlin, Chris Bretherton, Elynn Wu, James Duncan, Laure Zanna, Mitchell Bushuk, Oliver Watt-Meyer, Spencer K. Clark, William Gregory","cross_cats":["cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2026-03-12T21:00:26Z","title":"FloeNet: A mass-conserving global sea ice emulator that generalizes across climates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.12449","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d5e1cf6f9e45e2b1e5ce4e58675520e87a722a9d1e541fd7c4a61288acc9e77a","target":"record","created_at":"2026-07-14T01:22:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e9a4d47c6e877704a79aab4acde2e33dd946b2f637468c44a15b355e725c5e65","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2026-03-12T21:00:26Z","title_canon_sha256":"05142457d0a38f5dd794f207d7475e9485ea7f510f90fb4af7ccdda2917fe17c"},"schema_version":"1.0","source":{"id":"2603.12449","kind":"arxiv","version":1}},"canonical_sha256":"af6c57ab66d226236e8b1277f11df3d6e33ff12142c59c3fe69086c6c5df27aa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af6c57ab66d226236e8b1277f11df3d6e33ff12142c59c3fe69086c6c5df27aa","first_computed_at":"2026-07-14T01:22:05.277549Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-14T01:22:05.277549Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5R2CLUGL8XDhJy+gdYWslLH4L5GTyX9mIAu874RYujoGZBAau4p5RbED3wOeRgngWrruozzIEFNR9syirt77BA==","signature_status":"signed_v1","signed_at":"2026-07-14T01:22:05.278436Z","signed_message":"canonical_sha256_bytes"},"source_id":"2603.12449","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d5e1cf6f9e45e2b1e5ce4e58675520e87a722a9d1e541fd7c4a61288acc9e77a","sha256:7d6a16a2017cdf8f596d3d36213496761f5a1a2faf5c9aad73399cd0f3cc2a45"],"state_sha256":"bd523f454155a5a737392bc2a8ba73ede21902a38fc6963bdcf398378eebc0ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TNAultlOPyGsFAwC6H0gqPMph75ZxZLhGD6hTTqdsbLZVr75OV9DbZNQ12xOuArXqNH5ZWiaJWMXJVdL4KrnBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T03:57:55.020663Z","bundle_sha256":"d38bd192c977d3ae3959686ed42eb2f244133b25f4976bbdb03388b2ab5c01d9"}}