{"paper":{"title":"Demographics of Mesoscale Eddies in an Eddy-Permitting Ocean Model and Reanalysis","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Eddy-permitting ocean models and reanalysis data miss nearly 30 percent of the mesoscale eddies detected in satellite altimetry and produce eddies that live longer, grow larger, and remain weaker.","cross_cats":[],"primary_cat":"physics.ao-ph","authors_text":"Benjamin Lombardi, Ian Grooms, William Kleiber","submitted_at":"2026-04-24T13:08:20Z","abstract_excerpt":"Ocean mesoscale eddies can be thought of as the \"weather\" of the ocean and strongly influence the ocean's physics, chemistry, and biology; they influence other components of the Earth system via air-sea and sea-ice interactions, and are crucial drivers of marine heat waves. Thus, proper modeling of eddies in both historical and future climates is crucial to accurately capturing the Earth system. Climate projections using global coupled models with eddying ocean components are only recently starting to be more widely used. Despite their critical role in understanding and forecasting climate cha"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"When compared to eddies observed in satellite altimetry data, eddies in reanalysis data and ocean model output are missing almost 30% of the number of eddy trajectories. In addition to missing eddy trajectories, the characteristics of eddies in reanalysis data and ocean model output differ from eddies observed in satellite altimetry data. At a high level, eddies in reanalysis data and ocean model output tend to live longer, are larger, and are weaker than eddies in observed altimetry data.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the eddy detection and tracking algorithm applied consistently to altimetry, reanalysis, and model output produces directly comparable results without systematic biases arising from differences in data noise, resolution effects, or how the underlying fields are generated.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Ocean models and reanalyses at 1/4° resolution capture fewer, longer-lasting, larger, and weaker mesoscale eddies than satellite observations.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Eddy-permitting ocean models and reanalysis data miss nearly 30 percent of the mesoscale eddies detected in satellite altimetry and produce eddies that live longer, grow larger, and remain weaker.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"a8511650ff1a671a0bc7003a5bc74007b54a5f4f86566a4989f9bc4530676b65"},"source":{"id":"2604.22524","kind":"arxiv","version":1},"verdict":{"id":"a8c5cf07-6f80-479a-b906-e15795d30a29","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-08T09:06:10.596233Z","strongest_claim":"When compared to eddies observed in satellite altimetry data, eddies in reanalysis data and ocean model output are missing almost 30% of the number of eddy trajectories. In addition to missing eddy trajectories, the characteristics of eddies in reanalysis data and ocean model output differ from eddies observed in satellite altimetry data. At a high level, eddies in reanalysis data and ocean model output tend to live longer, are larger, and are weaker than eddies in observed altimetry data.","one_line_summary":"Ocean models and reanalyses at 1/4° resolution capture fewer, longer-lasting, larger, and weaker mesoscale eddies than satellite observations.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the eddy detection and tracking algorithm applied consistently to altimetry, reanalysis, and model output produces directly comparable results without systematic biases arising from differences in data noise, resolution effects, or how the underlying fields are generated.","pith_extraction_headline":"Eddy-permitting ocean models and reanalysis data miss nearly 30 percent of the mesoscale eddies detected in satellite altimetry and produce eddies that live longer, grow larger, and remain weaker."},"integrity":{"clean":false,"summary":{"advisory":1,"critical":0,"by_detector":{"doi_compliance":{"total":1,"advisory":1,"critical":0,"informational":0}},"informational":0},"endpoint":"/pith/2604.22524/integrity.json","findings":[{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. 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