{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:RODOZSWCGL5BZJRWTN4RWAXJKK","short_pith_number":"pith:RODOZSWC","canonical_record":{"source":{"id":"2408.14587","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2024-08-26T19:16:08Z","cross_cats_sorted":["physics.ao-ph"],"title_canon_sha256":"ecf7fd1d33e18776601a7823e248e8a8e598aa69f2e2263f6dddcd73f6be096d","abstract_canon_sha256":"05e731c0395fcc448915e67e0f086f9730f2f2f2c001e1d0cbf0ae8c7eadc387"},"schema_version":"1.0"},"canonical_sha256":"8b86eccac232fa1ca6369b791b02e952b5ff77b5e25dbe2c9309a5ca4445e3fd","source":{"kind":"arxiv","id":"2408.14587","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.14587","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"arxiv_version","alias_value":"2408.14587v2","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.14587","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"pith_short_12","alias_value":"RODOZSWCGL5B","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"pith_short_16","alias_value":"RODOZSWCGL5BZJRW","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"pith_short_8","alias_value":"RODOZSWC","created_at":"2026-07-05T11:52:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:RODOZSWCGL5BZJRWTN4RWAXJKK","target":"record","payload":{"canonical_record":{"source":{"id":"2408.14587","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2024-08-26T19:16:08Z","cross_cats_sorted":["physics.ao-ph"],"title_canon_sha256":"ecf7fd1d33e18776601a7823e248e8a8e598aa69f2e2263f6dddcd73f6be096d","abstract_canon_sha256":"05e731c0395fcc448915e67e0f086f9730f2f2f2c001e1d0cbf0ae8c7eadc387"},"schema_version":"1.0"},"canonical_sha256":"8b86eccac232fa1ca6369b791b02e952b5ff77b5e25dbe2c9309a5ca4445e3fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:52:00.367565Z","signature_b64":"cQPwDW43g6Z8a9zbfJNbaxCsMYb1J6J//rpBkmQXKPNsGGenl/+kklx8a6gg50zd5Cjme8TFVnoDrlgH/srOBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b86eccac232fa1ca6369b791b02e952b5ff77b5e25dbe2c9309a5ca4445e3fd","last_reissued_at":"2026-07-05T11:52:00.367101Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:52:00.367101Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.14587","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:52:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mt5CAbDZMV2HuuDbUaUMrI20J0MJjSb5+WZxpcFrbAuUH+IE873gJXQKq35OwCmXK/EU/41l5Ul8imwMmJ27BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T09:29:32.408536Z"},"content_sha256":"71f215ccd5092fd2ca973a354b3a0f504286f51f4225b3397ae6e96da59f272e","schema_version":"1.0","event_id":"sha256:71f215ccd5092fd2ca973a354b3a0f504286f51f4225b3397ae6e96da59f272e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:RODOZSWCGL5BZJRWTN4RWAXJKK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient fine-tuning of 37-level GraphCast with the Canadian global deterministic analysis","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ao-ph"],"primary_cat":"cs.LG","authors_text":"Christopher Subich","submitted_at":"2024-08-26T19:16:08Z","abstract_excerpt":"This work describes a process for efficiently fine-tuning the GraphCast data-driven forecast model to simulate another analysis system, here the Global Deterministic Prediction System (GDPS) of Environment and Climate Change Canada (ECCC). Using two years of training data (July 2019 -- December 2021) and 37 GPU-days of computation to tune the 37-level, quarter-degree version of GraphCast, the resulting model significantly outperforms both the unmodified GraphCast and operational forecast, showing significant forecast skill in the troposphere over lead times from 1 to 10 days. This fine-tuning "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.14587","kind":"arxiv","version":2},"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/2408.14587/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":"2026-07-05T11:52:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YTUU4uWLV/GVDXV/7sQ7l0ew21kbvC5f10K2YfYxBrWc+XleLVDH5vHTRCOrXbm38qSTFrNwJaMS5DuTPT2LCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T09:29:32.409268Z"},"content_sha256":"c49bd9d2023c1b3764081b101bfd3e53703851b721f5fea94807bfdd166ac865","schema_version":"1.0","event_id":"sha256:c49bd9d2023c1b3764081b101bfd3e53703851b721f5fea94807bfdd166ac865"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RODOZSWCGL5BZJRWTN4RWAXJKK/bundle.json","state_url":"https://pith.science/pith/RODOZSWCGL5BZJRWTN4RWAXJKK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RODOZSWCGL5BZJRWTN4RWAXJKK/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":"2026-08-10T09:29:32Z","links":{"resolver":"https://pith.science/pith/RODOZSWCGL5BZJRWTN4RWAXJKK","bundle":"https://pith.science/pith/RODOZSWCGL5BZJRWTN4RWAXJKK/bundle.json","state":"https://pith.science/pith/RODOZSWCGL5BZJRWTN4RWAXJKK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RODOZSWCGL5BZJRWTN4RWAXJKK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:RODOZSWCGL5BZJRWTN4RWAXJKK","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":"05e731c0395fcc448915e67e0f086f9730f2f2f2c001e1d0cbf0ae8c7eadc387","cross_cats_sorted":["physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2024-08-26T19:16:08Z","title_canon_sha256":"ecf7fd1d33e18776601a7823e248e8a8e598aa69f2e2263f6dddcd73f6be096d"},"schema_version":"1.0","source":{"id":"2408.14587","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.14587","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"arxiv_version","alias_value":"2408.14587v2","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.14587","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"pith_short_12","alias_value":"RODOZSWCGL5B","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"pith_short_16","alias_value":"RODOZSWCGL5BZJRW","created_at":"2026-07-05T11:52:00Z"},{"alias_kind":"pith_short_8","alias_value":"RODOZSWC","created_at":"2026-07-05T11:52:00Z"}],"graph_snapshots":[{"event_id":"sha256:c49bd9d2023c1b3764081b101bfd3e53703851b721f5fea94807bfdd166ac865","target":"graph","created_at":"2026-07-05T11:52:00Z","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/2408.14587/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This work describes a process for efficiently fine-tuning the GraphCast data-driven forecast model to simulate another analysis system, here the Global Deterministic Prediction System (GDPS) of Environment and Climate Change Canada (ECCC). Using two years of training data (July 2019 -- December 2021) and 37 GPU-days of computation to tune the 37-level, quarter-degree version of GraphCast, the resulting model significantly outperforms both the unmodified GraphCast and operational forecast, showing significant forecast skill in the troposphere over lead times from 1 to 10 days. This fine-tuning ","authors_text":"Christopher Subich","cross_cats":["physics.ao-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2024-08-26T19:16:08Z","title":"Efficient fine-tuning of 37-level GraphCast with the Canadian global deterministic analysis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.14587","kind":"arxiv","version":2},"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":"sha256:71f215ccd5092fd2ca973a354b3a0f504286f51f4225b3397ae6e96da59f272e","target":"record","created_at":"2026-07-05T11:52:00Z","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":"05e731c0395fcc448915e67e0f086f9730f2f2f2c001e1d0cbf0ae8c7eadc387","cross_cats_sorted":["physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2024-08-26T19:16:08Z","title_canon_sha256":"ecf7fd1d33e18776601a7823e248e8a8e598aa69f2e2263f6dddcd73f6be096d"},"schema_version":"1.0","source":{"id":"2408.14587","kind":"arxiv","version":2}},"canonical_sha256":"8b86eccac232fa1ca6369b791b02e952b5ff77b5e25dbe2c9309a5ca4445e3fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b86eccac232fa1ca6369b791b02e952b5ff77b5e25dbe2c9309a5ca4445e3fd","first_computed_at":"2026-07-05T11:52:00.367101Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:52:00.367101Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cQPwDW43g6Z8a9zbfJNbaxCsMYb1J6J//rpBkmQXKPNsGGenl/+kklx8a6gg50zd5Cjme8TFVnoDrlgH/srOBw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:52:00.367565Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.14587","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71f215ccd5092fd2ca973a354b3a0f504286f51f4225b3397ae6e96da59f272e","sha256:c49bd9d2023c1b3764081b101bfd3e53703851b721f5fea94807bfdd166ac865"],"state_sha256":"c301c0a7e81d16b72848a74b26725a40e4622a866b8bbca92ff63536731601ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3yNJ1h3P0Y2amfagYKlUEc57Go/shTYKMZt3fqtHhEijC9c+B2u8Exoszklu+drtd/hI5XieCstJP7e0GKSoBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T09:29:32.415572Z","bundle_sha256":"9b922ebe477cef5fd5f05122d0875ee18c4f23f150092441fea247e76c29018a"}}