{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:7RMQ7I4R7P2SVXRPIF4WMQF5CU","short_pith_number":"pith:7RMQ7I4R","canonical_record":{"source":{"id":"1103.0722","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2011-03-03T15:57:48Z","cross_cats_sorted":[],"title_canon_sha256":"1ec55d0ccf8f7a4d5a5d05f072de12474a06303e78758b3ba269541d62e2a999","abstract_canon_sha256":"501c6f03873d711fde5f4c5294a0edef0fa2d5f90fe7d5e47e6ee6d858263a36"},"schema_version":"1.0"},"canonical_sha256":"fc590fa391fbf52ade2f41796640bd151379a9ab9cda791a10cf590b5f1e3acc","source":{"kind":"arxiv","id":"1103.0722","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.0722","created_at":"2026-05-18T02:03:00Z"},{"alias_kind":"arxiv_version","alias_value":"1103.0722v1","created_at":"2026-05-18T02:03:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.0722","created_at":"2026-05-18T02:03:00Z"},{"alias_kind":"pith_short_12","alias_value":"7RMQ7I4R7P2S","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"7RMQ7I4R7P2SVXRP","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"7RMQ7I4R","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:7RMQ7I4R7P2SVXRPIF4WMQF5CU","target":"record","payload":{"canonical_record":{"source":{"id":"1103.0722","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2011-03-03T15:57:48Z","cross_cats_sorted":[],"title_canon_sha256":"1ec55d0ccf8f7a4d5a5d05f072de12474a06303e78758b3ba269541d62e2a999","abstract_canon_sha256":"501c6f03873d711fde5f4c5294a0edef0fa2d5f90fe7d5e47e6ee6d858263a36"},"schema_version":"1.0"},"canonical_sha256":"fc590fa391fbf52ade2f41796640bd151379a9ab9cda791a10cf590b5f1e3acc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:00.366655Z","signature_b64":"nanqjcJ4IFcvVxkyytZPnIO5HVF7qLzy+enh2TIBjM9uRx29UYKiZ7NhlRdw8kt7/qoKxixthyBHPr4g9/OgBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc590fa391fbf52ade2f41796640bd151379a9ab9cda791a10cf590b5f1e3acc","last_reissued_at":"2026-05-18T02:03:00.365993Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:00.365993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1103.0722","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":"2026-05-18T02:03:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GSeQFN556r3NZvGNnQHh+9+KDVNd22GvrgiyKI5kBGyHV7E4wEkCGlcDo/dQZCM4s3vEnS4lTFYlkCI8kvv9Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:54:52.462088Z"},"content_sha256":"320e9ae6692052938b8e464ff7dc07adedb9cb118bbd289242e32f7a16d5fb66","schema_version":"1.0","event_id":"sha256:320e9ae6692052938b8e464ff7dc07adedb9cb118bbd289242e32f7a16d5fb66"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:7RMQ7I4R7P2SVXRPIF4WMQF5CU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entropy production and multiple equilibria: the case of the ice-albedo feedback","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ao-ph","authors_text":"B\\'ereng\\`ere Dubrulle, Corentin Herbert, Didier Paillard","submitted_at":"2011-03-03T15:57:48Z","abstract_excerpt":"Nonlinear feedbacks in the Earth System provide mechanisms that can prove very useful in understanding complex dynamics with relatively simple concepts. For example, the temperature and the ice cover of the planet are linked in a positive feedback which gives birth to multiple equilibria for some values of the solar constant: fully ice-covered Earth, ice-free Earth and an intermediate unstable solution. In this study, we show an analogy between a classical dynamical system approach to this problem and a Maximum Entropy Production (MEP) principle view, and we suggest a glimpse on how to reconci"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0722","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":"2026-05-18T02:03:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NSadx6o/fIA83qvx+z1AjnSze50VJDpTdpWa7qf5/WtLjc8aCqmvCCPjIRDb0bEZzdM9gqtlfgqro+yoKKGQAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:54:52.462447Z"},"content_sha256":"134ceaedc0b21df9d18dd1a6606331b052dbda8edcece536dfaf0842401e2249","schema_version":"1.0","event_id":"sha256:134ceaedc0b21df9d18dd1a6606331b052dbda8edcece536dfaf0842401e2249"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7RMQ7I4R7P2SVXRPIF4WMQF5CU/bundle.json","state_url":"https://pith.science/pith/7RMQ7I4R7P2SVXRPIF4WMQF5CU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7RMQ7I4R7P2SVXRPIF4WMQF5CU/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":"2026-05-20T18:54:52Z","links":{"resolver":"https://pith.science/pith/7RMQ7I4R7P2SVXRPIF4WMQF5CU","bundle":"https://pith.science/pith/7RMQ7I4R7P2SVXRPIF4WMQF5CU/bundle.json","state":"https://pith.science/pith/7RMQ7I4R7P2SVXRPIF4WMQF5CU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7RMQ7I4R7P2SVXRPIF4WMQF5CU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:7RMQ7I4R7P2SVXRPIF4WMQF5CU","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":"501c6f03873d711fde5f4c5294a0edef0fa2d5f90fe7d5e47e6ee6d858263a36","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2011-03-03T15:57:48Z","title_canon_sha256":"1ec55d0ccf8f7a4d5a5d05f072de12474a06303e78758b3ba269541d62e2a999"},"schema_version":"1.0","source":{"id":"1103.0722","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.0722","created_at":"2026-05-18T02:03:00Z"},{"alias_kind":"arxiv_version","alias_value":"1103.0722v1","created_at":"2026-05-18T02:03:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.0722","created_at":"2026-05-18T02:03:00Z"},{"alias_kind":"pith_short_12","alias_value":"7RMQ7I4R7P2S","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"7RMQ7I4R7P2SVXRP","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"7RMQ7I4R","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:134ceaedc0b21df9d18dd1a6606331b052dbda8edcece536dfaf0842401e2249","target":"graph","created_at":"2026-05-18T02:03:00Z","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"},"paper":{"abstract_excerpt":"Nonlinear feedbacks in the Earth System provide mechanisms that can prove very useful in understanding complex dynamics with relatively simple concepts. For example, the temperature and the ice cover of the planet are linked in a positive feedback which gives birth to multiple equilibria for some values of the solar constant: fully ice-covered Earth, ice-free Earth and an intermediate unstable solution. In this study, we show an analogy between a classical dynamical system approach to this problem and a Maximum Entropy Production (MEP) principle view, and we suggest a glimpse on how to reconci","authors_text":"B\\'ereng\\`ere Dubrulle, Corentin Herbert, Didier Paillard","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2011-03-03T15:57:48Z","title":"Entropy production and multiple equilibria: the case of the ice-albedo feedback"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0722","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":"sha256:320e9ae6692052938b8e464ff7dc07adedb9cb118bbd289242e32f7a16d5fb66","target":"record","created_at":"2026-05-18T02:03:00Z","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":"501c6f03873d711fde5f4c5294a0edef0fa2d5f90fe7d5e47e6ee6d858263a36","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2011-03-03T15:57:48Z","title_canon_sha256":"1ec55d0ccf8f7a4d5a5d05f072de12474a06303e78758b3ba269541d62e2a999"},"schema_version":"1.0","source":{"id":"1103.0722","kind":"arxiv","version":1}},"canonical_sha256":"fc590fa391fbf52ade2f41796640bd151379a9ab9cda791a10cf590b5f1e3acc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc590fa391fbf52ade2f41796640bd151379a9ab9cda791a10cf590b5f1e3acc","first_computed_at":"2026-05-18T02:03:00.365993Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:00.365993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nanqjcJ4IFcvVxkyytZPnIO5HVF7qLzy+enh2TIBjM9uRx29UYKiZ7NhlRdw8kt7/qoKxixthyBHPr4g9/OgBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:00.366655Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.0722","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:320e9ae6692052938b8e464ff7dc07adedb9cb118bbd289242e32f7a16d5fb66","sha256:134ceaedc0b21df9d18dd1a6606331b052dbda8edcece536dfaf0842401e2249"],"state_sha256":"09e877416aff72cde6959cb4126079b48571d6060ee04d4dd58e695d5aee45e6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tSDa1N/J5Wrs6Z88piaPsHnTRzWGH/6FGOAe0h6uNU13pQKmOO6UiK9AZBE21LsF0lQ4GmzHsp8I7lNSJbinDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T18:54:52.464733Z","bundle_sha256":"d234dca7dd645d91fc2a5ef6b0b8cba53272f81fd30026791e6fc8db7439e0a8"}}