{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:AD5ZHPN267ELMEZR55BE5D25PP","short_pith_number":"pith:AD5ZHPN2","canonical_record":{"source":{"id":"1911.09541","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2019-11-21T15:29:53Z","cross_cats_sorted":["physics.flu-dyn","physics.geo-ph"],"title_canon_sha256":"36cca7b851efb94978e1be8445247e0bc90f85abc6e14327c3208e8c97855fbf","abstract_canon_sha256":"21e9b9b1eea888fe6a3f2f0dd4670e7446293286b9ac027b792811224bf3a82a"},"schema_version":"1.0"},"canonical_sha256":"00fb93bdbaf7c8b61331ef424e8f5d7bce73292e8efde4082c2bebe29f710799","source":{"kind":"arxiv","id":"1911.09541","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.09541","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"arxiv_version","alias_value":"1911.09541v4","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.09541","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"pith_short_12","alias_value":"AD5ZHPN267EL","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"pith_short_16","alias_value":"AD5ZHPN267ELMEZR","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"pith_short_8","alias_value":"AD5ZHPN2","created_at":"2026-07-05T02:15:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:AD5ZHPN267ELMEZR55BE5D25PP","target":"record","payload":{"canonical_record":{"source":{"id":"1911.09541","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2019-11-21T15:29:53Z","cross_cats_sorted":["physics.flu-dyn","physics.geo-ph"],"title_canon_sha256":"36cca7b851efb94978e1be8445247e0bc90f85abc6e14327c3208e8c97855fbf","abstract_canon_sha256":"21e9b9b1eea888fe6a3f2f0dd4670e7446293286b9ac027b792811224bf3a82a"},"schema_version":"1.0"},"canonical_sha256":"00fb93bdbaf7c8b61331ef424e8f5d7bce73292e8efde4082c2bebe29f710799","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:15:21.868719Z","signature_b64":"J1jMcvOeO0du2rgD+qCFpnHm7u7PCZFxMYI9Xp9bBIhXsOsw6SvG1fB60S6KyR+/UIOLb1TEkDgetrBCYJOZDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"00fb93bdbaf7c8b61331ef424e8f5d7bce73292e8efde4082c2bebe29f710799","last_reissued_at":"2026-07-05T02:15:21.868274Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:15:21.868274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.09541","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:15:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N+xiFwyLs3bhdQzNSepwWuxM5VPoRFnQ9/n379cvqWaHUKpmR1jGXMHuAbKjo0/SQ/eGPYjST4Tvd7TvURuoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:39:36.713172Z"},"content_sha256":"2a58f4947f70101e8c5f2f1d84a38147b3be3d61b827133650475e927ee074ff","schema_version":"1.0","event_id":"sha256:2a58f4947f70101e8c5f2f1d84a38147b3be3d61b827133650475e927ee074ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:AD5ZHPN267ELMEZR55BE5D25PP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Confronting Grand Challenges in Environmental Fluid Mechanics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.flu-dyn","physics.geo-ph"],"primary_cat":"physics.ao-ph","authors_text":"A. Woods, C. Cenedese, C. Gorl\\'e, C.P. Caulfield, E. Meiburg, G. Haller, G.N. Ivey, N.M. Vriend, N. Pinardi, P. Bauer, P.F. Linden, T. Dauxois, T. Peacock","submitted_at":"2019-11-21T15:29:53Z","abstract_excerpt":"Environmental fluid mechanics underlies a wealth of natural, industrial and, by extension, societal challenges. In the coming decades, as we strive towards a more sustainable planet, there are a wide range of grand challenge problems that need to be tackled, ranging from fundamental advances in understanding and modeling of stratified turbulence and consequent mixing, to applied studies of pollution transport in the ocean, atmosphere and urban environments. A workshop was organized in the Les Houches School of Physics in France in January 2019 with the objective of gathering leading figures in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.09541","kind":"arxiv","version":4},"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/1911.09541/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":"2026-07-05T02:15:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7EDuyWx8BOxArmuF3o8S07nIu3zFA7+GE3SuNRjLUx75Iy4boZeXI0/kc7x+re+lqq+wu16FK6dPBi5mMU9DAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:39:36.713830Z"},"content_sha256":"3f666e77dd9588ecd8f40d2b273fac4f7421165072b924aed3aa689a3c8efb5b","schema_version":"1.0","event_id":"sha256:3f666e77dd9588ecd8f40d2b273fac4f7421165072b924aed3aa689a3c8efb5b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AD5ZHPN267ELMEZR55BE5D25PP/bundle.json","state_url":"https://pith.science/pith/AD5ZHPN267ELMEZR55BE5D25PP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AD5ZHPN267ELMEZR55BE5D25PP/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":"2026-07-07T06:39:36Z","links":{"resolver":"https://pith.science/pith/AD5ZHPN267ELMEZR55BE5D25PP","bundle":"https://pith.science/pith/AD5ZHPN267ELMEZR55BE5D25PP/bundle.json","state":"https://pith.science/pith/AD5ZHPN267ELMEZR55BE5D25PP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AD5ZHPN267ELMEZR55BE5D25PP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:AD5ZHPN267ELMEZR55BE5D25PP","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":"21e9b9b1eea888fe6a3f2f0dd4670e7446293286b9ac027b792811224bf3a82a","cross_cats_sorted":["physics.flu-dyn","physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2019-11-21T15:29:53Z","title_canon_sha256":"36cca7b851efb94978e1be8445247e0bc90f85abc6e14327c3208e8c97855fbf"},"schema_version":"1.0","source":{"id":"1911.09541","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.09541","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"arxiv_version","alias_value":"1911.09541v4","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.09541","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"pith_short_12","alias_value":"AD5ZHPN267EL","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"pith_short_16","alias_value":"AD5ZHPN267ELMEZR","created_at":"2026-07-05T02:15:21Z"},{"alias_kind":"pith_short_8","alias_value":"AD5ZHPN2","created_at":"2026-07-05T02:15:21Z"}],"graph_snapshots":[{"event_id":"sha256:3f666e77dd9588ecd8f40d2b273fac4f7421165072b924aed3aa689a3c8efb5b","target":"graph","created_at":"2026-07-05T02:15:21Z","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/1911.09541/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Environmental fluid mechanics underlies a wealth of natural, industrial and, by extension, societal challenges. In the coming decades, as we strive towards a more sustainable planet, there are a wide range of grand challenge problems that need to be tackled, ranging from fundamental advances in understanding and modeling of stratified turbulence and consequent mixing, to applied studies of pollution transport in the ocean, atmosphere and urban environments. A workshop was organized in the Les Houches School of Physics in France in January 2019 with the objective of gathering leading figures in","authors_text":"A. Woods, C. Cenedese, C. Gorl\\'e, C.P. Caulfield, E. Meiburg, G. Haller, G.N. Ivey, N.M. Vriend, N. Pinardi, P. Bauer, P.F. Linden, T. Dauxois, T. Peacock","cross_cats":["physics.flu-dyn","physics.geo-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2019-11-21T15:29:53Z","title":"Confronting Grand Challenges in Environmental Fluid Mechanics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.09541","kind":"arxiv","version":4},"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":"sha256:2a58f4947f70101e8c5f2f1d84a38147b3be3d61b827133650475e927ee074ff","target":"record","created_at":"2026-07-05T02:15:21Z","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":"21e9b9b1eea888fe6a3f2f0dd4670e7446293286b9ac027b792811224bf3a82a","cross_cats_sorted":["physics.flu-dyn","physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2019-11-21T15:29:53Z","title_canon_sha256":"36cca7b851efb94978e1be8445247e0bc90f85abc6e14327c3208e8c97855fbf"},"schema_version":"1.0","source":{"id":"1911.09541","kind":"arxiv","version":4}},"canonical_sha256":"00fb93bdbaf7c8b61331ef424e8f5d7bce73292e8efde4082c2bebe29f710799","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00fb93bdbaf7c8b61331ef424e8f5d7bce73292e8efde4082c2bebe29f710799","first_computed_at":"2026-07-05T02:15:21.868274Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:15:21.868274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J1jMcvOeO0du2rgD+qCFpnHm7u7PCZFxMYI9Xp9bBIhXsOsw6SvG1fB60S6KyR+/UIOLb1TEkDgetrBCYJOZDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:15:21.868719Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.09541","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a58f4947f70101e8c5f2f1d84a38147b3be3d61b827133650475e927ee074ff","sha256:3f666e77dd9588ecd8f40d2b273fac4f7421165072b924aed3aa689a3c8efb5b"],"state_sha256":"7012cbd7b1c49a2d295b522b58cd53c2fed3dbad3a0063987d99e5895fa4a067"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q644q01FXF7B0oEj3Gr467tGpAzqK0e/q3LI3Q4Y42bASvANp0HURgQZ7y5d1K9YJcBUJPKotMt57O2OAYjuCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T06:39:36.716570Z","bundle_sha256":"9a773c9980c791ea56a4e42460c057c900917192153a7998dda989f3beb096fa"}}