{
  "abstract": "The stability of the Atlantic Meridional Overturning Circulation (AMOC) is a major uncertainty in projections of future climate. However, direct evidence for AMOC tipping behavior on orbital timescales remains scarce. Here, we reconstruct the strength of Iceland-Scotland Overflow Water, a key lower branch of the deep Atlantic circulation, over the past 800,000 years by combining 12 current-speed records from North Atlantic sediment cores with a data-driven hybrid model. The resulting reconstruction reveals persistent alternation between weak (glacial) and strong (interglacial) circulation modes, pervasive millennial-scale variability within both regimes, and systematic asymmetry between weak-to-strong recoveries and strong-to-weak collapses. Threshold and phase-space analyses show that regime shifts occur within a narrow window of atmospheric carbon dioxide and sea level and often follow hysteresis-like loops. Although bistability persists throughout the last 800,000 years, its sensitivity and timing evolve through time. These findings provide long-term, high-resolution, data-driven constraints on the bistability of Nordic Seas overflow waters and its implications for AMOC resilience in a warming world.",
  "abstract_shown": true,
  "affiliations": [
    "Laboratoire des Sciences du Climat et de l’Environnement, LSCE, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France.",
    "Institut des Géosciences de l’Environnement, IGE, Université Grenoble Alpes, Saint-Martin d’Hères, France.",
    "Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium.",
    "Université de Bordeaux EPOC, UMR 5805, Pessac, France.",
    "Geo-Ocean, Université de Brest, CNRS, Ifremer, UMR 6538, Plouzané, France."
  ],
  "article_type": "Research Article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
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        0,
        1,
        2
      ],
      "name": "Nathan Stevenard",
      "orcid": "0000-0002-1838-9291"
    },
    {
      "affs": [
        0
      ],
      "name": "Aline Govin",
      "orcid": "0000-0001-8512-5571"
    },
    {
      "affs": [
        0
      ],
      "name": "Catherine Kissel",
      "orcid": "0000-0002-2572-2742"
    },
    {
      "affs": [
        3
      ],
      "name": "Didier Swingedouw",
      "orcid": "0000-0002-0583-0850"
    },
    {
      "affs": [
        4
      ],
      "name": "Samuel Toucanne",
      "orcid": "0000-0002-4858-8953"
    },
    {
      "affs": [
        0
      ],
      "name": "Nathaëlle Bouttes",
      "orcid": "0000-0002-7111-2048"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/72msenx0e0a83.bib",
  "cited_by": 0,
  "doi": "10.1126/sciadv.aee7886",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13733807/",
  "id": "72msenx0e0a83",
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  "language": "en",
  "licence": "CC-BY-4.0",
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  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
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  "native_subjects": [
    [
      "heading",
      "Climatology"
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    [
      "heading",
      "Earth, Environmental, Ecological, and Space Sciences"
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      "Research Article"
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  "pmcid": "PMC13733807",
  "pmid": "42981388",
  "published": "2026-11-04",
  "publisher": "American Association for the Advancement of Science (AAAS)",
  "ris": "https://research.draconitic.com/paper/72msenx0e0a83.ris",
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      "first_seen": "2026-11-05T00:20:34Z",
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  "subjects": [
    {
      "field": "earth",
      "origin": "heading:Climatology",
      "subfield": "climate"
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  ],
  "title": "Persistent bistability of Nordic Seas overflow waters over 800,000 years",
  "title_text": "Persistent bistability of Nordic Seas overflow waters over 800,000 years",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T12:23:31Z",
  "url": "https://research.draconitic.com/paper/72msenx0e0a83",
  "venue": "Science Advances",
  "versions": []
}