{
  "abstract": "Porewater oxygen concentrations and pH exert substantial influence on sediment diagenesis and potentially towards the reliability of palaeoceanographic records. However, these fundamental chemical parameters are not systematically measured during sea-going expeditions. This study presents an easy, inexpensive and effective method to measure marine sediment porewater oxygen and pH levels using optical sensors. The method was tested with multi-cores during expedition EASI-2 / PS140 onboard RV Polarstern from 22 locations in the Southern Ocean, spanning diverse environments from 0.5 to 4.5 km water depth. The results show that rapid measurements with non-invasive sensors can offer precise and accurate porewater oxygen and pH measurements at a high spatial resolution downcore. This method allows to rapidly identify sedimentary geochemical redox gradients, which would offer valuable information for marine geochemists and paleoceanographers.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "name": "Layla CREAC'H"
    },
    {
      "name": "Wytze Lenstra"
    },
    {
      "name": "Marcus Gutjahr"
    },
    {
      "name": "Manuel Ruben"
    },
    {
      "name": "Huang Huang"
    },
    {
      "name": "Patrick Blaser"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/evdhesfvyzhv1.bib",
  "cited_by": 0,
  "doi": "10.31223/x57j7r",
  "fulltext_url": null,
  "id": "evdhesfvyzhv1",
  "issns": [],
  "landing_url": "https://eartharxiv.org/repository/view/14989/",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/legalcode",
  "metadata_licence": null,
  "native_subjects": [
    [
      "bepress",
      "Chemistry"
    ],
    [
      "bepress",
      "Earth Sciences"
    ],
    [
      "bepress",
      "Environmental Sciences"
    ],
    [
      "bepress",
      "Marine sediment"
    ],
    [
      "bepress",
      "Oceanography and Atmospheric Sciences and Meteorology"
    ],
    [
      "bepress",
      "Optical sensor"
    ],
    [
      "bepress",
      "Oxygen"
    ],
    [
      "bepress",
      "Porewater"
    ],
    [
      "bepress",
      "pH"
    ],
    [
      "openalex",
      "1502|Analytical Chemistry and Sensors"
    ]
  ],
  "openalex": "W7213347464",
  "pdf_url": "https://eartharxiv.org/repository/object/14989/download/26066/",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/evdhesfvyzhv1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:31Z",
      "native_id": "14989",
      "source": "eartharxiv",
      "url": "https://eartharxiv.org/repository/view/14989/"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "bepress:Chemistry",
      "subfield": "general"
    },
    {
      "field": "earth",
      "origin": "bepress:Oceanography and Atmospheric Sciences and Meteorology",
      "subfield": "atmospheric"
    },
    {
      "field": "earth",
      "origin": "bepress:Environmental Sciences",
      "subfield": "environmental-science"
    },
    {
      "field": "earth",
      "origin": "bepress:Oceanography and Atmospheric Sciences and Meteorology",
      "subfield": "oceanography"
    }
  ],
  "title": "Efficient measurement of marine sedimentary porewater pH and oxygen concentrations using optical sensors",
  "title_text": "Efficient measurement of marine sedimentary porewater pH and oxygen concentrations using optical sensors",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:31Z",
  "url": "https://research.draconitic.com/paper/evdhesfvyzhv1",
  "venue": "EarthArXiv",
  "versions": []
}