{
  "abstract": "The Eastern Boundary Upwelling Systems (EBUS), such as the Southern California Current System (CCS), are well-known high-productivity regions driven by alongshore winds, although their role as oceanic sources and sinks of atmospheric CO ₂ in the global carbon cycle is poorly understood. In the southern CCS, off Baja California, wind-driven vertical mixing upwells nutrient and carbon-rich waters from late winter to early summer, while weaker winds during the rest of the year allow the intrusion of nutrients and carbon-depleted subtropical surface waters. Here, we interpret the isotopic composition of organic carbon and calcitic records spanning ∼ 160 years from high-resolution sediment cores collected off Baja California, showing a clear trend toward lighter carbon isotopic compositions of the organic and inorganic carbon for the past seven decades. These trends are similar to the atmospheric records associated with the ¹³ C Suess effect, suggesting an atmospheric carbon invasion into the surface waters of the California Current. Nevertheless, the slope of the atmospheric carbon isotopic records is steeper than our marine record, most likely related to the upward mixing of subsurface waters with a relatively heavier carbon isotopic signature and advection processes inherent to the strong seasonality of the CCS southern boundary. These results will allow a better characterization of the relative role of the EBUS regions in the global carbon cycle.",
  "abstract_shown": true,
  "affiliations": [
    "Centro de Investigación Científica y de Educación Superior de Ensenada (Ensenada, Mexico)"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "name": "Yéssica Vanessa Contreras-Pacheco",
      "orcid": "0000-0002-8608-7148"
    },
    {
      "name": "Jose Luis Abella-Gutiérrez",
      "orcid": "0000-0002-0220-3798"
    },
    {
      "name": "Gerardo Vallejo-Espinosa"
    },
    {
      "affs": [
        0
      ],
      "name": "Juan Carlos Herguera-García",
      "orcid": "0000-0001-8335-2607"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/39srahfcvq50b.bib",
  "cited_by": 0,
  "doi": "10.5194/bg-23-7397-2026",
  "fulltext_url": null,
  "id": "39srahfcvq50b",
  "issns": [
    "1726-4189",
    "1726-4170"
  ],
  "landing_url": "https://bg.copernicus.org/articles/23/7397/2026/",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "QE1-996.5"
    ],
    [
      "lcc",
      "QH501-531"
    ],
    [
      "lcc",
      "QH540-549.5"
    ],
    [
      "openalex",
      "1910|Marine and coastal ecosystems"
    ]
  ],
  "openalex": "W4417311799",
  "pdf_url": "https://bg.copernicus.org/articles/23/7397/2026/bg-23-7397-2026.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": "Copernicus GmbH",
  "ris": "https://research.draconitic.com/paper/39srahfcvq50b.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:46Z",
      "native_id": "10.5194/bg-23-7397-2026",
      "source": "crossref",
      "url": "https://bg.copernicus.org/articles/23/7397/2026/"
    },
    {
      "first_seen": "2026-10-30T13:43:04Z",
      "native_id": "6e973a638d9f4d069947bf415aee33a9",
      "source": "doaj",
      "url": "https://doi.org/10.5194/bg-23-7397-2026"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:1910|Marine and coastal ecosystems",
      "subfield": "oceanography"
    }
  ],
  "title": "Timing of the anthropogenic carbon invasion in the Southern California Current",
  "title_text": "Timing of the anthropogenic carbon invasion in the Southern California Current",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:43:04Z",
  "url": "https://research.draconitic.com/paper/39srahfcvq50b",
  "venue": "Biogeosciences",
  "versions": [
    {
      "doi": "10.5194/egusphere-2025-5945",
      "pid": null,
      "relation": "preprint",
      "title": null,
      "venue": null
    }
  ]
}