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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/gmd-2020-173
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2020-173
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model description paper 10 Aug 2020

Submitted as: model description paper | 10 Aug 2020

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This preprint is currently under review for the journal GMD.

A Meridionally Averaged Model of Eastern Boundary Upwelling Systems (MAMEBUSv1.0)

Jordyn E. Moscoso, Andrew L. Stewart, Daniele Bianchi, and James C. McWilliams Jordyn E. Moscoso et al.
  • Department of Atmospheric Sciences – University of California, Los Angeles

Abstract. Eastern Boundary Upwelling Systems (EBUSs) are physically and biologically active regions of the ocean with substantial impacts on ocean biogeochemistry, ecology, and global fish catch. Previous studies have used models of varying complexity to study EBUS dynamics, ranging from minimal two-dimensional (2D) models to comprehensive regional and global models. An advantage of 2D models is that they are more computationally efficient and easier to interpret than comprehensive regional models, but their key drawback is the lack of explicit representations of important three-dimensional processes that control biology in upwelling systems. These processes include eddy quenching of nutrients and meridional transport of nutrients and heat. The authors present a Meridionally Averaged Model of Eastern Boundary Upwelling Systems (MAMEBUS) that aims at combining the benefits of 2D and 3D approaches to modeling EBUSs by parameterizing the key 3D processes in a 2D framework. MAMEBUS couples the primitive equations for the physical state of the ocean with a nutrient-phytoplankton-zooplankton-detritus model of the ecosystem, solved in terrain following coordinates. This article defines the equations that describe the tracer, momentum, and biological evolution, along with physical parameterizations of eddy advection, isopycal mixing, and boundary layer mixing. It describes the details of the numerical schemes and their implementation in the model code, and provides a reference solution validated against observations from the California Current. The goal of MAMEBUS is to facilitate future studies to efficiently explore the wide space of physical and biogeochemical parameters that control the zonal variations in EBUSs.

Jordyn E. Moscoso et al.

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Jordyn E. Moscoso et al.

Model code and software

A Meridionally Averaged Model of Eastern Boundary Upwelling Systems (v1.0) Jordyn E. Moscoso and Andrew L. Stewart https://doi.org/10.5281/zenodo.3866652

Jordyn E. Moscoso et al.

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Latest update: 28 Sep 2020
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Short summary
This project was created to understand the across-shore distribution of plankton in the California Current System. To complete this study, we used a quasi-2D dynamical model coupled to an ecosystem model. This paper is a preliminary study to test and validate the model against data collected by The California Cooperative Oceanic Fisheries Investigations (CalCOFI). We show the solution of our model solution compares well to the data and discuss our model as a tool for further model development.
This project was created to understand the across-shore distribution of plankton in the...
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