{
  "abstract": "Dissolved organic matter (DOM) is a central component of biogeochemical cycling, but molecular observations generated by ultrahigh-resolution mass spectrometry remain fragmented across studies, limiting quantitative comparisons among ecosystems. Here, we compile and harmonize a global dataset of DOM molecular traits comprising 3,999 samples from 337 studies published between 2005 and 2026. The dataset includes eight intensity-weighted molecular traits: hydrogen-to-carbon (H/C), oxygen-to-carbon (O/C), nitrogen-to-carbon (N/C), and sulfur-to-carbon (S/C) ratios; molecular mass; double-bond equivalents (DBE); modified aromaticity index (AImod); and nominal oxidation state of carbon (NOSC). Samples span aquatic, terrestrial, atmospheric, plant-associated, petroleum-related, and other environments, and are linked, where available, to geographic, physicochemical, nutrient, and climatic metadata. Molecular data were harmonized using common definitions and restricted to negative-mode electrospray-ionization FT-ICR MS to improve cross-study comparability. This resource enables cross-system comparisons of DOM molecular traits and supports analyses of environmental gradients, geographic coverage, and global DOM chemogeography.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Geography and Limnology, Chinese Academy of Sciences"
  ],
  "article_type": "Confirmatory results",
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "name": "l. han"
    },
    {
      "name": "K. Song"
    },
    {
      "name": "J. Stegen"
    },
    {
      "affs": [
        0
      ],
      "name": "A. Hu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/52q2ah8k799a1.bib",
  "cited_by": 0,
  "doi": "10.64898/2026.09.22.753682",
  "fulltext_url": "https://www.biorxiv.org/content/10.64898/2026.09.22.753682v1.full",
  "id": "52q2ah8k799a1",
  "issns": [],
  "landing_url": "https://www.biorxiv.org/content/10.64898/2026.09.22.753682v1",
  "language": null,
  "licence": "CC-BY-NC",
  "licence_label": "CC BY-NC",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "biorxiv",
      "ecology"
    ],
    [
      "openalex",
      "1910|Marine and coastal ecosystems"
    ]
  ],
  "openalex": "W7214114293",
  "pdf_url": "https://www.biorxiv.org/content/10.64898/2026.09.22.753682v1.full.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/52q2ah8k799a1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:07Z",
      "native_id": "10.64898/2026.09.22.753682",
      "source": "biorxiv",
      "url": "https://www.biorxiv.org/content/10.64898/2026.09.22.753682v1"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "biorxiv:ecology",
      "subfield": "ecology"
    }
  ],
  "title": "Toward a global chemogeography of dissolved organic matter: a molecular trait dataset across Earth systems",
  "title_text": "Toward a global chemogeography of dissolved organic matter: a molecular trait dataset across Earth systems",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:07Z",
  "url": "https://research.draconitic.com/paper/52q2ah8k799a1",
  "venue": "bioRxiv",
  "versions": []
}