{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:UUF4AUDWYUFG7ROK6YX7HRB75W","short_pith_number":"pith:UUF4AUDW","canonical_record":{"source":{"id":"1409.5359","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2014-09-18T16:14:02Z","cross_cats_sorted":[],"title_canon_sha256":"2fb0ee5bd3c58aa0302c65be0c7a93e0f351b939faaa97712f51e9640d419233","abstract_canon_sha256":"dd9a2860fa819057972dd96a32a1ff618ad27d0b67e956fc0ce8a80445be8375"},"schema_version":"1.0"},"canonical_sha256":"a50bc05076c50a6fc5caf62ff3c43fed9e03ef1cd95c0b8d21f1e72ecc25f959","source":{"kind":"arxiv","id":"1409.5359","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.5359","created_at":"2026-05-18T01:33:56Z"},{"alias_kind":"arxiv_version","alias_value":"1409.5359v2","created_at":"2026-05-18T01:33:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.5359","created_at":"2026-05-18T01:33:56Z"},{"alias_kind":"pith_short_12","alias_value":"UUF4AUDWYUFG","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UUF4AUDWYUFG7ROK","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UUF4AUDW","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:UUF4AUDWYUFG7ROK6YX7HRB75W","target":"record","payload":{"canonical_record":{"source":{"id":"1409.5359","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2014-09-18T16:14:02Z","cross_cats_sorted":[],"title_canon_sha256":"2fb0ee5bd3c58aa0302c65be0c7a93e0f351b939faaa97712f51e9640d419233","abstract_canon_sha256":"dd9a2860fa819057972dd96a32a1ff618ad27d0b67e956fc0ce8a80445be8375"},"schema_version":"1.0"},"canonical_sha256":"a50bc05076c50a6fc5caf62ff3c43fed9e03ef1cd95c0b8d21f1e72ecc25f959","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:56.992384Z","signature_b64":"bt90A+2eXJgd3YQm0c/D4ZDiRYTrWv/Y/FqkQYbljprGHwNG+25bXJnePd2Ze8rqzHJWeVqgYUDOkmNrQd99Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a50bc05076c50a6fc5caf62ff3c43fed9e03ef1cd95c0b8d21f1e72ecc25f959","last_reissued_at":"2026-05-18T01:33:56.992028Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:56.992028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.5359","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":"2026-05-18T01:33:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A5rHeJFrf0+qSeEebGq/re9AhNbnqaHtSrXme3RZILVm5cayS9Vkpj0GgjT27yyQNM+G77cHE6uuai/H3lZnBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T14:13:23.679547Z"},"content_sha256":"3376d3401d5879cc7570b1b51437988a8e48d21fd387bdaef7e12c6006e38f61","schema_version":"1.0","event_id":"sha256:3376d3401d5879cc7570b1b51437988a8e48d21fd387bdaef7e12c6006e38f61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:UUF4AUDWYUFG7ROK6YX7HRB75W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Using the Twentieth Century Reanalysis to assess climate variability for the European wind industry","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.ao-ph","authors_text":"Hazel E. Thornton, Philip E. Bett, Robin T. Clark","submitted_at":"2014-09-18T16:14:02Z","abstract_excerpt":"We characterise the long-term variability of European near-surface wind speeds using 142 years of data from the Twentieth Century Reanalysis (20CR), and consider the potential of such long-baseline climate data sets for wind energy applications. The low resolution of the 20CR would severely restrict its use on its own for wind farm site-screening. We therefore perform a simple statistical calibration to link it to the higher-resolution ERA-Interim data set (ERAI), such that the adjusted 20CR data has the same wind speed distribution at each location as ERAI during their common period. Using th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.5359","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":""},"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":"2026-05-18T01:33:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8ORwRjPRzP3ngvZuOjKVkq2pR3UubIPXPo55T/pXaaE6/4BU9cBwVHrjiTLJdQ0SIBYIMcCshx/xb5/juI0oBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T14:13:23.680249Z"},"content_sha256":"f7ce95b84c4fdf8d752cc18d48a37a3a67888fa9c76d43070b732f526a5080e3","schema_version":"1.0","event_id":"sha256:f7ce95b84c4fdf8d752cc18d48a37a3a67888fa9c76d43070b732f526a5080e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UUF4AUDWYUFG7ROK6YX7HRB75W/bundle.json","state_url":"https://pith.science/pith/UUF4AUDWYUFG7ROK6YX7HRB75W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UUF4AUDWYUFG7ROK6YX7HRB75W/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":"2026-06-06T14:13:23Z","links":{"resolver":"https://pith.science/pith/UUF4AUDWYUFG7ROK6YX7HRB75W","bundle":"https://pith.science/pith/UUF4AUDWYUFG7ROK6YX7HRB75W/bundle.json","state":"https://pith.science/pith/UUF4AUDWYUFG7ROK6YX7HRB75W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UUF4AUDWYUFG7ROK6YX7HRB75W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:UUF4AUDWYUFG7ROK6YX7HRB75W","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":"dd9a2860fa819057972dd96a32a1ff618ad27d0b67e956fc0ce8a80445be8375","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2014-09-18T16:14:02Z","title_canon_sha256":"2fb0ee5bd3c58aa0302c65be0c7a93e0f351b939faaa97712f51e9640d419233"},"schema_version":"1.0","source":{"id":"1409.5359","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.5359","created_at":"2026-05-18T01:33:56Z"},{"alias_kind":"arxiv_version","alias_value":"1409.5359v2","created_at":"2026-05-18T01:33:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.5359","created_at":"2026-05-18T01:33:56Z"},{"alias_kind":"pith_short_12","alias_value":"UUF4AUDWYUFG","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UUF4AUDWYUFG7ROK","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UUF4AUDW","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:f7ce95b84c4fdf8d752cc18d48a37a3a67888fa9c76d43070b732f526a5080e3","target":"graph","created_at":"2026-05-18T01:33:56Z","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"},"paper":{"abstract_excerpt":"We characterise the long-term variability of European near-surface wind speeds using 142 years of data from the Twentieth Century Reanalysis (20CR), and consider the potential of such long-baseline climate data sets for wind energy applications. The low resolution of the 20CR would severely restrict its use on its own for wind farm site-screening. We therefore perform a simple statistical calibration to link it to the higher-resolution ERA-Interim data set (ERAI), such that the adjusted 20CR data has the same wind speed distribution at each location as ERAI during their common period. Using th","authors_text":"Hazel E. Thornton, Philip E. Bett, Robin T. Clark","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2014-09-18T16:14:02Z","title":"Using the Twentieth Century Reanalysis to assess climate variability for the European wind industry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.5359","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":"sha256:3376d3401d5879cc7570b1b51437988a8e48d21fd387bdaef7e12c6006e38f61","target":"record","created_at":"2026-05-18T01:33:56Z","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":"dd9a2860fa819057972dd96a32a1ff618ad27d0b67e956fc0ce8a80445be8375","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ao-ph","submitted_at":"2014-09-18T16:14:02Z","title_canon_sha256":"2fb0ee5bd3c58aa0302c65be0c7a93e0f351b939faaa97712f51e9640d419233"},"schema_version":"1.0","source":{"id":"1409.5359","kind":"arxiv","version":2}},"canonical_sha256":"a50bc05076c50a6fc5caf62ff3c43fed9e03ef1cd95c0b8d21f1e72ecc25f959","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a50bc05076c50a6fc5caf62ff3c43fed9e03ef1cd95c0b8d21f1e72ecc25f959","first_computed_at":"2026-05-18T01:33:56.992028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:33:56.992028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bt90A+2eXJgd3YQm0c/D4ZDiRYTrWv/Y/FqkQYbljprGHwNG+25bXJnePd2Ze8rqzHJWeVqgYUDOkmNrQd99Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:33:56.992384Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.5359","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3376d3401d5879cc7570b1b51437988a8e48d21fd387bdaef7e12c6006e38f61","sha256:f7ce95b84c4fdf8d752cc18d48a37a3a67888fa9c76d43070b732f526a5080e3"],"state_sha256":"e3e0e1d47f306203970ed565bdbe88e925af4343fea33ad46c38d5d3b84dc685"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ub6WyINL/A0zuEJygzRo5QHirvy1JC4nDDqLuQd39Sn3BBqr2vBI9z1NCvBdszBH0gHUqt/dkWlldtoEiTWZBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T14:13:23.684114Z","bundle_sha256":"b82d908b27c432004ac356c5c7dadc617b0add5d99dbe82a669d807584b37e21"}}