{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:6GERIRMHC7UMRVUNCVW6J54QR5","short_pith_number":"pith:6GERIRMH","canonical_record":{"source":{"id":"0712.3965","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2007-12-24T05:59:57Z","cross_cats_sorted":["cs.NA","math.NA","physics.comp-ph"],"title_canon_sha256":"eced5d00cb0b5eb40bb6f468760855baf76bbcc9c00ec27691e73b8ce8d89f27","abstract_canon_sha256":"d7723ebc593c2ab256c67d4c9b205f6ce9002e5c9241130b4d0068f34b8b3f37"},"schema_version":"1.0"},"canonical_sha256":"f18914458717e8c8d68d156de4f7908f54df7dea1386584c911e633ce59ee781","source":{"kind":"arxiv","id":"0712.3965","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.3965","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"arxiv_version","alias_value":"0712.3965v2","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.3965","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"pith_short_12","alias_value":"6GERIRMHC7UM","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"pith_short_16","alias_value":"6GERIRMHC7UMRVUN","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"pith_short_8","alias_value":"6GERIRMH","created_at":"2026-06-03T22:06:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:6GERIRMHC7UMRVUNCVW6J54QR5","target":"record","payload":{"canonical_record":{"source":{"id":"0712.3965","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2007-12-24T05:59:57Z","cross_cats_sorted":["cs.NA","math.NA","physics.comp-ph"],"title_canon_sha256":"eced5d00cb0b5eb40bb6f468760855baf76bbcc9c00ec27691e73b8ce8d89f27","abstract_canon_sha256":"d7723ebc593c2ab256c67d4c9b205f6ce9002e5c9241130b4d0068f34b8b3f37"},"schema_version":"1.0"},"canonical_sha256":"f18914458717e8c8d68d156de4f7908f54df7dea1386584c911e633ce59ee781","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-03T22:06:03.858033Z","signature_b64":"z0Q/o0K7KOptUtb9tP+hyKLNk7vWmiMIes0F9ZRoQp5gNdosBl71lu4qgh+cV+8poH0+S1fsHjEt0zR0wirPDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f18914458717e8c8d68d156de4f7908f54df7dea1386584c911e633ce59ee781","last_reissued_at":"2026-06-03T22:06:03.857605Z","signature_status":"signed_v1","first_computed_at":"2026-06-03T22:06:03.857605Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0712.3965","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":"2026-06-03T22:06:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qiQ75ivNII4VFn7X5eqrrQOQ+2ANhHTTxu5HwgMNLd5CjQnInqiVR80ICuPLMS2EhRFLbR7isUmAuaKuMmdbDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:05:04.203544Z"},"content_sha256":"069d0a384366c9396dd77df6a7d8fa7dd6c3813c97b33836bb3f51dd7cc8065e","schema_version":"1.0","event_id":"sha256:069d0a384366c9396dd77df6a7d8fa7dd6c3813c97b33836bb3f51dd7cc8065e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:6GERIRMHC7UMRVUNCVW6J54QR5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Data Assimilation for Wildland Fires: Ensemble Kalman filters in coupled atmosphere-surface models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.NA","math.NA","physics.comp-ph"],"primary_cat":"physics.ao-ph","authors_text":"Janice L. Coen, Jan Mandel, Jonathan D. Beezley, Minjeong Kim","submitted_at":"2007-12-24T05:59:57Z","abstract_excerpt":"Two wildland fire models are described, one based on reaction-diffusion-convection partial differential equations, and one based on semi-empirical fire spread by the level let method. The level set method model is coupled with the Weather Research and Forecasting (WRF) atmospheric model. The regularized and the morphing ensemble Kalman filter are used for data assimilation."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.3965","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/0712.3965/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":"2026-06-03T22:06:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/SussUaW454ezdDzJdKLlpSdDf9eCt6DK/5kDfLsxUOUKaZdzPBWWuwtodfeBxTadD9dnl5TKE/DS4UZ/5VQAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:05:04.204327Z"},"content_sha256":"87dde0c3e05c71b63950eeda688d70a2982867bdbbd40a117ca36009f22759db","schema_version":"1.0","event_id":"sha256:87dde0c3e05c71b63950eeda688d70a2982867bdbbd40a117ca36009f22759db"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6GERIRMHC7UMRVUNCVW6J54QR5/bundle.json","state_url":"https://pith.science/pith/6GERIRMHC7UMRVUNCVW6J54QR5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6GERIRMHC7UMRVUNCVW6J54QR5/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":"2026-06-09T05:05:04Z","links":{"resolver":"https://pith.science/pith/6GERIRMHC7UMRVUNCVW6J54QR5","bundle":"https://pith.science/pith/6GERIRMHC7UMRVUNCVW6J54QR5/bundle.json","state":"https://pith.science/pith/6GERIRMHC7UMRVUNCVW6J54QR5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6GERIRMHC7UMRVUNCVW6J54QR5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:6GERIRMHC7UMRVUNCVW6J54QR5","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":"d7723ebc593c2ab256c67d4c9b205f6ce9002e5c9241130b4d0068f34b8b3f37","cross_cats_sorted":["cs.NA","math.NA","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2007-12-24T05:59:57Z","title_canon_sha256":"eced5d00cb0b5eb40bb6f468760855baf76bbcc9c00ec27691e73b8ce8d89f27"},"schema_version":"1.0","source":{"id":"0712.3965","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.3965","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"arxiv_version","alias_value":"0712.3965v2","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.3965","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"pith_short_12","alias_value":"6GERIRMHC7UM","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"pith_short_16","alias_value":"6GERIRMHC7UMRVUN","created_at":"2026-06-03T22:06:03Z"},{"alias_kind":"pith_short_8","alias_value":"6GERIRMH","created_at":"2026-06-03T22:06:03Z"}],"graph_snapshots":[{"event_id":"sha256:87dde0c3e05c71b63950eeda688d70a2982867bdbbd40a117ca36009f22759db","target":"graph","created_at":"2026-06-03T22:06:03Z","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/0712.3965/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Two wildland fire models are described, one based on reaction-diffusion-convection partial differential equations, and one based on semi-empirical fire spread by the level let method. The level set method model is coupled with the Weather Research and Forecasting (WRF) atmospheric model. The regularized and the morphing ensemble Kalman filter are used for data assimilation.","authors_text":"Janice L. Coen, Jan Mandel, Jonathan D. Beezley, Minjeong Kim","cross_cats":["cs.NA","math.NA","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2007-12-24T05:59:57Z","title":"Data Assimilation for Wildland Fires: Ensemble Kalman filters in coupled atmosphere-surface models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.3965","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":"sha256:069d0a384366c9396dd77df6a7d8fa7dd6c3813c97b33836bb3f51dd7cc8065e","target":"record","created_at":"2026-06-03T22:06:03Z","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":"d7723ebc593c2ab256c67d4c9b205f6ce9002e5c9241130b4d0068f34b8b3f37","cross_cats_sorted":["cs.NA","math.NA","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2007-12-24T05:59:57Z","title_canon_sha256":"eced5d00cb0b5eb40bb6f468760855baf76bbcc9c00ec27691e73b8ce8d89f27"},"schema_version":"1.0","source":{"id":"0712.3965","kind":"arxiv","version":2}},"canonical_sha256":"f18914458717e8c8d68d156de4f7908f54df7dea1386584c911e633ce59ee781","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f18914458717e8c8d68d156de4f7908f54df7dea1386584c911e633ce59ee781","first_computed_at":"2026-06-03T22:06:03.857605Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-03T22:06:03.857605Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z0Q/o0K7KOptUtb9tP+hyKLNk7vWmiMIes0F9ZRoQp5gNdosBl71lu4qgh+cV+8poH0+S1fsHjEt0zR0wirPDw==","signature_status":"signed_v1","signed_at":"2026-06-03T22:06:03.858033Z","signed_message":"canonical_sha256_bytes"},"source_id":"0712.3965","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:069d0a384366c9396dd77df6a7d8fa7dd6c3813c97b33836bb3f51dd7cc8065e","sha256:87dde0c3e05c71b63950eeda688d70a2982867bdbbd40a117ca36009f22759db"],"state_sha256":"23c5ac19bf0fc3a0ee517ab3dda037033ec93a6e51c25e2754623a98cf2054d8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pJYVvpynIMmLmw5Cy4RkIgIsWx0OXRo/qL7lfc018FnuE3bjwpiKBjtYj7sp0t560lh5EBukgOu4Xxvu5h4NDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T05:05:04.208154Z","bundle_sha256":"4fcb39e804cd781a6cb80082a656da5d6453c688d6ea40a3acad992003fbbafb"}}