{
  "abstract": "The Baroclinic Annular Mode (BAM) strongly influences extratropical circulation, yet its role in the global hydrological cycle remains unclear. Using ERA5 reanalysis and a global atmospheric river (AR) database, we show that BAM systematically reorganizes AR occurrence and extreme precipitation in both hemispheres. During high-BAM states, AR frequency increases along the flanks of major storm tracks and decreases near their climatological cores, redistributing preferred AR corridors. Relative AR-frequency changes locally exceed 50%, with the most zonally coherent patterns over the Southern Ocean. Extreme precipitation varies correspondingly, with 99th-percentile precipitation occurrence increasing by more than 50% across broad poleward storm-track regions. A large fraction of these extremes coincide with ARs, and AR-associated extreme precipitation shows similar BAM-related modulations. Low-BAM states show broadly opposite anomalies. These results identify BAM as a key mode linking large-scale circulation to global moisture transport and hydrological extremes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.33072",
  "author_total": 3,
  "authors": [
    {
      "name": "Yuan-Bing Zhao"
    },
    {
      "name": "Lei Wang"
    },
    {
      "name": "Yi Ming"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/30pk7793prsxp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.33072",
  "fulltext_url": null,
  "id": "30pk7793prsxp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.33072",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.ao-ph"
    ],
    [
      "openalex",
      "2306|Climate variability and models"
    ]
  ],
  "openalex": "W7214744156",
  "pdf_url": "https://arxiv.org/pdf/2609.33072",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/30pk7793prsxp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.33072",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.33072"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "arxiv:physics.ao-ph",
      "subfield": "atmospheric"
    }
  ],
  "title": "Baroclinic Annular Mode Modulates Global Atmospheric Rivers and Extreme Precipitation",
  "title_text": "Baroclinic Annular Mode Modulates Global Atmospheric Rivers and Extreme Precipitation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/30pk7793prsxp",
  "venue": "arXiv",
  "versions": []
}