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A vertically resolved model for phytoplankton aggregation

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Abstract

This work presents models of the vertical distribution and flux of phytoplankton aggregates, including changes with time in the distribution of aggregate sizes and sinking speeds. The distribution of sizes is described by two parameters, the mass and number of aggregates, which greatly reduces the computational cost of the models. Simple experiments demonstrate the effects of aggregation on the timing and depth distribution of primary production and export. A more detailed ecological model is applied to sites in the Arabian Sea; it demonstrates that aggregation can be important for deep sedimentation even when its effect on surface concentrations is small, and it presents the difference in timing between settlement of aggregates and fecal pellets.

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Authors and Affiliations

  1. Institut für Meereskunde, Düsternbrooker Weg 20, 24105, Kiel, Germany

    Iris Kriest

  2. Department of Fisheries and Oceans, P O Box 5667, A1C 5X1, St. John’s, NF, Canada

    Geoffrey T. Evans

Authors
  1. Iris Kriest
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  2. Geoffrey T. Evans
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Kriest, I., Evans, G.T. A vertically resolved model for phytoplankton aggregation. J Earth Syst Sci 109, 453–469 (2000). https://doi.org/10.1007/BF02708333

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