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Globally consistent assessment of coastal eutrophication

Author

Listed:
  • Elígio de Raús Maúre

    (Northwest Pacific Region Environmental Cooperation Center)

  • Genki Terauchi

    (Northwest Pacific Region Environmental Cooperation Center)

  • Joji Ishizaka

    (Nagoya University)

  • Nicholas Clinton

    (Google LLC)

  • Michael DeWitt

    (Google LLC)

Abstract

Eutrophication is an emerging global issue associated with increasing anthropogenic nutrient loading. The impacts and extent of eutrophication are often limited to regions with dedicated monitoring programmes. Here we introduce the first global and Google Earth Engine-based interactive assessment tool of coastal eutrophication potential (CEP). The tool evaluates trends in satellite-derived chlorophyll-a (CHL) to devise a global map of CEP. Our analyses suggest that, globally, coastal waters (depth ≤200 m) covering ∼1.15 million km2 are eutrophic potential. Also, waters associated with CHL increasing trends—eutrophication potential—are twofold higher than those showing signs of recovery. The tool effectively identified areas of known eutrophication with severe symptoms, like dead zones, as well as those with limited to no information of the eutrophication. Our tool introduces the prospect for a consistent global assessment of eutrophication trends with major implications for monitoring Sustainable Development Goals (SDGs) and the application of Earth Observations in support of SDGs.

Suggested Citation

  • Elígio de Raús Maúre & Genki Terauchi & Joji Ishizaka & Nicholas Clinton & Michael DeWitt, 2021. "Globally consistent assessment of coastal eutrophication," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26391-9
    DOI: 10.1038/s41467-021-26391-9
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    1. Michael J. Behrenfeld & Robert T. O’Malley & David A. Siegel & Charles R. McClain & Jorge L. Sarmiento & Gene C. Feldman & Allen J. Milligan & Paul G. Falkowski & Ricardo M. Letelier & Emmanuel S. Bos, 2006. "Climate-driven trends in contemporary ocean productivity," Nature, Nature, vol. 444(7120), pages 752-755, December.
    2. Helga do Rosário Gomes & Joaquim I. Goes & S. G. P. Matondkar & Edward J. Buskey & Subhajit Basu & Sushma Parab & Prasad Thoppil, 2014. "Massive outbreaks of Noctiluca scintillans blooms in the Arabian Sea due to spread of hypoxia," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
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    1. Awais Mahmood & Ahsan Farooq & Haseeb Akbar & Hafiz Usman Ghani & Shabbir H. Gheewala, 2023. "An Integrated Approach to Analyze the Progress of Developing Economies in Asia toward the Sustainable Development Goals," Sustainability, MDPI, vol. 15(18), pages 1-33, September.

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