{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:M6QWQ3TUHDICJPMYVSO2VGJFRG","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":"39e39dccf7eda7bb9a4c7187b1e1b69878dbad08fbf994c7d81645d2e9d026c2","cross_cats_sorted":["math-ph","math.AP","math.MP","physics.ao-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-02-06T08:01:52Z","title_canon_sha256":"cf4787d42f414897b4c77c0e78a9fbfea888509b765f932975c711a9bf51eb66"},"schema_version":"1.0","source":{"id":"2602.06473","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.06473","created_at":"2026-06-23T03:13:54Z"},{"alias_kind":"arxiv_version","alias_value":"2602.06473v2","created_at":"2026-06-23T03:13:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.06473","created_at":"2026-06-23T03:13:54Z"},{"alias_kind":"pith_short_12","alias_value":"M6QWQ3TUHDIC","created_at":"2026-06-23T03:13:54Z"},{"alias_kind":"pith_short_16","alias_value":"M6QWQ3TUHDICJPMY","created_at":"2026-06-23T03:13:54Z"},{"alias_kind":"pith_short_8","alias_value":"M6QWQ3TU","created_at":"2026-06-23T03:13:54Z"}],"graph_snapshots":[{"event_id":"sha256:01da77c39cfdc811a9f0f55f3cd8b0ef6e2b68b71e750e1faa2759de901bf792","target":"graph","created_at":"2026-06-23T03:13:54Z","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/2602.06473/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Starting from the Navier--Stokes equations in rotating spherical coordinates with depth-varying density and eddy viscosity, we derive an asymptotic model describing non-equatorial wind-generated ocean drift currents. Our approach allows for large-scale flows that cannot be captured by classical tangent-plane approximations. The strategy is to perform a careful scaling and to perform a double asymptotic expansion with respect to two small parameters arising from the scaling: the Rossby number and the ratio between the Ekman depth and the Earth's radius. We obtain a system of linear ordinary dif","authors_text":"Christian Puntini, Eduard Stefanescu, Luigi Roberti","cross_cats":["math-ph","math.AP","math.MP","physics.ao-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-02-06T08:01:52Z","title":"On large-scale wind-drift ocean currents: An asymptotic approach in spherical coordinates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.06473","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:d0f8c7cdfbcd9d0f2efebde6910b3c2cd46fb7dee67b9de05a634fcc6ef25ee1","target":"record","created_at":"2026-06-23T03:13:54Z","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":"39e39dccf7eda7bb9a4c7187b1e1b69878dbad08fbf994c7d81645d2e9d026c2","cross_cats_sorted":["math-ph","math.AP","math.MP","physics.ao-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-02-06T08:01:52Z","title_canon_sha256":"cf4787d42f414897b4c77c0e78a9fbfea888509b765f932975c711a9bf51eb66"},"schema_version":"1.0","source":{"id":"2602.06473","kind":"arxiv","version":2}},"canonical_sha256":"67a1686e7438d024bd98ac9daa99258985a5ee2f3113a0fbfccd4b5302c47bba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67a1686e7438d024bd98ac9daa99258985a5ee2f3113a0fbfccd4b5302c47bba","first_computed_at":"2026-06-23T03:13:54.046918Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-23T03:13:54.046918Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NUyMbS8+aCkLXe2BpGxIiefz6t+SYwDXH/ErhGl32C3OoHBCAg1wDml5xrp0qZXx+McJuOfOyL2HJn/cWlfCDQ==","signature_status":"signed_v1","signed_at":"2026-06-23T03:13:54.047430Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.06473","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d0f8c7cdfbcd9d0f2efebde6910b3c2cd46fb7dee67b9de05a634fcc6ef25ee1","sha256:01da77c39cfdc811a9f0f55f3cd8b0ef6e2b68b71e750e1faa2759de901bf792"],"state_sha256":"0eedb8c1c9b0cb2f63a61d5de0ac32ddb19fcee8a3e46429625c9feed65230ef"}