{
  "abstract": "Chlorophyll-a (Chl-a) concentration is a key climate variable, as its variability is associated with meteorological and oceanographic processes. This study analyzed 25 years (1998-2022) of Chl-a data from the European Space Agency (ESA) Ocean Colour Climate Change Initiative (OC-CCI) multisensor archive for the South Brazil Bight, Southwestern Atlantic. Temporal variability and trends were assessed using the Census X11 method, Mann-Kendall, and Sens' slope tests. The ESA OC-CCI data highlight reliable regional performance, although Chl-a concentrations above 10 mg.m -3 were underestimated. Temporal analyses showed the lowest Chl-a variability (29%) in open ocean waters, with 81% of the variability attributed to seasonal dynamics influenced by the South Atlantic Subtropical Gyre (SASG). A negative Chl-a trend of -11.0% was observed over the 25-year period, attributed to the expansion of the oligotrophic area of the SASG. In the shelf areas southwest of São Sebastião Island, Chl-a variability was moderate (34%-39%), with no discernible long-term trend, but significant interannual variability (44%). The Cape Frio upwelling region shows an increasing Chl-a trend (14.5% in the last 25 years), driven by atmospheric circulation affecting local winds. The highest Chl-a variability (74%) occurred along the southern continental shelf, associated with seasonal nutrient inputs from the Subtropical Shelf Front, with a Chla-a trend increase of 7.5% in 25 years. These results highlight the dynamic and variable Chl-a responses to environmental forcing across the South Brazil Bight.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "João Felipe Cardoso dos Santos"
    },
    {
      "name": "Milton Kampel"
    },
    {
      "name": "Vincent Vantrepotte"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bzv0sbkk4wjv1.bib",
  "cited_by": 4,
  "doi": "10.3389/frsen.2025.1544375",
  "fulltext_url": null,
  "id": "bzv0sbkk4wjv1",
  "issns": [
    "2673-6187"
  ],
  "landing_url": "https://hal.science/hal-05797840v1",
  "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": [
    [
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      "0.sde"
    ],
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    ],
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    ],
    [
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      "1.sde.mcg"
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      "1.sdu.stu"
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    [
      "openalex",
      "1910|Marine and coastal ecosystems"
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  "openalex": "W4408635810",
  "pdf_url": "https://hal.science/hal-05797840/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": "Frontiers Media",
  "ris": "https://research.draconitic.com/paper/bzv0sbkk4wjv1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:56Z",
      "native_id": "hal-05797840",
      "source": "hal",
      "url": "https://hal.science/hal-05797840v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:1.sde.mcg",
      "subfield": "climate"
    },
    {
      "field": "earth",
      "origin": "hal:0.sde",
      "subfield": "environmental-science"
    },
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.oc",
      "subfield": "oceanography"
    }
  ],
  "title": "Spatiotemporal variability of chlorophyll-a concentration in the South Brazil Bight using 25 years of multi-sensor orbital data (1998–2022)",
  "title_text": "Spatiotemporal variability of chlorophyll-a concentration in the South Brazil Bight using 25 years of multi-sensor orbital data (1998–2022)",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:56Z",
  "url": "https://research.draconitic.com/paper/bzv0sbkk4wjv1",
  "venue": "Frontiers in Remote Sensing",
  "versions": []
}