{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2QTIB53UIDLVV7RGWLVOAYH3TZ","short_pith_number":"pith:2QTIB53U","canonical_record":{"source":{"id":"1902.10608","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2019-02-27T16:01:50Z","cross_cats_sorted":["physics.ao-ph"],"title_canon_sha256":"ba6a2daf9405f954029679e71e628e8d671ce5279cad45292691a56129e6f111","abstract_canon_sha256":"962562e338a1e0d6f5719f5b97a2199afb537a82019c2a5a8b2ac81b4f9a827c"},"schema_version":"1.0"},"canonical_sha256":"d42680f77440d75afe26b2eae060fb9e5e9f4da36779e36188155f1a30ee615b","source":{"kind":"arxiv","id":"1902.10608","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.10608","created_at":"2026-05-17T23:44:29Z"},{"alias_kind":"arxiv_version","alias_value":"1902.10608v1","created_at":"2026-05-17T23:44:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.10608","created_at":"2026-05-17T23:44:29Z"},{"alias_kind":"pith_short_12","alias_value":"2QTIB53UIDLV","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2QTIB53UIDLVV7RG","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2QTIB53U","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2QTIB53UIDLVV7RGWLVOAYH3TZ","target":"record","payload":{"canonical_record":{"source":{"id":"1902.10608","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2019-02-27T16:01:50Z","cross_cats_sorted":["physics.ao-ph"],"title_canon_sha256":"ba6a2daf9405f954029679e71e628e8d671ce5279cad45292691a56129e6f111","abstract_canon_sha256":"962562e338a1e0d6f5719f5b97a2199afb537a82019c2a5a8b2ac81b4f9a827c"},"schema_version":"1.0"},"canonical_sha256":"d42680f77440d75afe26b2eae060fb9e5e9f4da36779e36188155f1a30ee615b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:29.246039Z","signature_b64":"0YKwOIJ6wrWB2cOKfpJh9WIiQD8Py2wbHCp/bbSeYTRGFA5rnE30bNcxAkFFsLHuW8qqxMXsFLBeKaa9fnAqBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d42680f77440d75afe26b2eae060fb9e5e9f4da36779e36188155f1a30ee615b","last_reissued_at":"2026-05-17T23:44:29.245427Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:29.245427Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.10608","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":"2026-05-17T23:44:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aDWCpjco3OM9fUgaj413SCCKA9ecZ6OiUW30zPvl8EIfT3BJQBr+04Ay5gS8gZihn3hve6Bn92CPWTW3U/tcAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:08:11.856038Z"},"content_sha256":"ee2f53d84472085b110692d59f8e0180ea8ea48061879321b019d3395d30069a","schema_version":"1.0","event_id":"sha256:ee2f53d84472085b110692d59f8e0180ea8ea48061879321b019d3395d30069a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2QTIB53UIDLVV7RGWLVOAYH3TZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Energy Constraints for Climate Models from Hydrologic Partitioning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ao-ph"],"primary_cat":"physics.geo-ph","authors_text":"Amilcare Porporato, Edoardo Daly, Jun Yin, Salvatore Calabrese","submitted_at":"2019-02-27T16:01:50Z","abstract_excerpt":"It is well known that evaporative cooling of Earth's surface water reduces the amount of radiation that goes into sensible heat, namely the portion of radiation that produces higher temperatures. However, a rigorous use of long-term hydrologic measurements and the related theories of hydrologic partitioning have not yet been fully exploited to quantify these effects on climate. Here, we show that the Budyko's curve, a well-known and efficient framework for water balance estimation, can be effectively utilized to partition the surface energy fluxes by expressing the long-term evaporative fracti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.10608","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":""},"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":"2026-05-17T23:44:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FQW/Qt/kAHcpaqPZpJBcdrfcMJ2cNyMC+LqihPd/xOZz0boArQWdMI4CYGFUjpd2XRpQnFTgXCEPQm3Iu0fwBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:08:11.856759Z"},"content_sha256":"5b095841a0358923e1e4405a73ff587601dc01929e505f5558fb1300a48fdd76","schema_version":"1.0","event_id":"sha256:5b095841a0358923e1e4405a73ff587601dc01929e505f5558fb1300a48fdd76"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2QTIB53UIDLVV7RGWLVOAYH3TZ/bundle.json","state_url":"https://pith.science/pith/2QTIB53UIDLVV7RGWLVOAYH3TZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2QTIB53UIDLVV7RGWLVOAYH3TZ/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":"2026-05-26T11:08:11Z","links":{"resolver":"https://pith.science/pith/2QTIB53UIDLVV7RGWLVOAYH3TZ","bundle":"https://pith.science/pith/2QTIB53UIDLVV7RGWLVOAYH3TZ/bundle.json","state":"https://pith.science/pith/2QTIB53UIDLVV7RGWLVOAYH3TZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2QTIB53UIDLVV7RGWLVOAYH3TZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2QTIB53UIDLVV7RGWLVOAYH3TZ","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":"962562e338a1e0d6f5719f5b97a2199afb537a82019c2a5a8b2ac81b4f9a827c","cross_cats_sorted":["physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2019-02-27T16:01:50Z","title_canon_sha256":"ba6a2daf9405f954029679e71e628e8d671ce5279cad45292691a56129e6f111"},"schema_version":"1.0","source":{"id":"1902.10608","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.10608","created_at":"2026-05-17T23:44:29Z"},{"alias_kind":"arxiv_version","alias_value":"1902.10608v1","created_at":"2026-05-17T23:44:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.10608","created_at":"2026-05-17T23:44:29Z"},{"alias_kind":"pith_short_12","alias_value":"2QTIB53UIDLV","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2QTIB53UIDLVV7RG","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2QTIB53U","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:5b095841a0358923e1e4405a73ff587601dc01929e505f5558fb1300a48fdd76","target":"graph","created_at":"2026-05-17T23:44:29Z","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":"It is well known that evaporative cooling of Earth's surface water reduces the amount of radiation that goes into sensible heat, namely the portion of radiation that produces higher temperatures. However, a rigorous use of long-term hydrologic measurements and the related theories of hydrologic partitioning have not yet been fully exploited to quantify these effects on climate. Here, we show that the Budyko's curve, a well-known and efficient framework for water balance estimation, can be effectively utilized to partition the surface energy fluxes by expressing the long-term evaporative fracti","authors_text":"Amilcare Porporato, Edoardo Daly, Jun Yin, Salvatore Calabrese","cross_cats":["physics.ao-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2019-02-27T16:01:50Z","title":"Energy Constraints for Climate Models from Hydrologic Partitioning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.10608","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:ee2f53d84472085b110692d59f8e0180ea8ea48061879321b019d3395d30069a","target":"record","created_at":"2026-05-17T23:44:29Z","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":"962562e338a1e0d6f5719f5b97a2199afb537a82019c2a5a8b2ac81b4f9a827c","cross_cats_sorted":["physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2019-02-27T16:01:50Z","title_canon_sha256":"ba6a2daf9405f954029679e71e628e8d671ce5279cad45292691a56129e6f111"},"schema_version":"1.0","source":{"id":"1902.10608","kind":"arxiv","version":1}},"canonical_sha256":"d42680f77440d75afe26b2eae060fb9e5e9f4da36779e36188155f1a30ee615b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d42680f77440d75afe26b2eae060fb9e5e9f4da36779e36188155f1a30ee615b","first_computed_at":"2026-05-17T23:44:29.245427Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:29.245427Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0YKwOIJ6wrWB2cOKfpJh9WIiQD8Py2wbHCp/bbSeYTRGFA5rnE30bNcxAkFFsLHuW8qqxMXsFLBeKaa9fnAqBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:29.246039Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.10608","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee2f53d84472085b110692d59f8e0180ea8ea48061879321b019d3395d30069a","sha256:5b095841a0358923e1e4405a73ff587601dc01929e505f5558fb1300a48fdd76"],"state_sha256":"28595c8e1a8de8098b7ce138e8f9aa78b20ecd34388678cdb2c2c62eb5266e50"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HPzibPqkORPmvsRV89aeeKOReq3GrD1ZBsxW/kG/1pfK0mkknQm51F4dDs9CNxmRKFs1ccdd/GCMOrNphSZ7BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T11:08:11.860424Z","bundle_sha256":"cdd46619cb93587d64fe4c17f100efd8944ce0f4531ebb022039eed3ee2cd811"}}