Preprints
https://doi.org/10.5194/gmd-2020-437
https://doi.org/10.5194/gmd-2020-437

Submitted as: development and technical paper 17 Feb 2021

Submitted as: development and technical paper | 17 Feb 2021

Review status: this preprint is currently under review for the journal GMD.

Integrating CVMix into GOTM (v6.0): A consistent framework for testing, comparing, and applying ocean mixing schemes

Qing Li1, Jorn Bruggeman2,3, Hans Burchard4, Knut Klingbeil4, Lars Umlauf4, and Karsten Bolding2,5 Qing Li et al.
  • 1Fluid Dynamics and Solid Mechanics, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
  • 2Bolding & Bruggeman ApS., 5466 Asperup, Denmark
  • 3Plymouth Marine Laboratory, Prospect Place, the Hoe, Plymouth PL1 3DH, UK
  • 4Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany
  • 5Department of Bioscience, Aarhus University, 8600 Silkeborg, Denmark

Abstract. The General Ocean Turbulence Model (GOTM) is a one-dimensional water column model including a set of state-of-the-art turbulence closure models, and has widely been used in various applications in the ocean modeling community. Here we extend GOTM to include a set of newly developed ocean surface vertical mixing parameterizations of Langmuir turbulence via coupling with the Community Vertical Mixing Project (CVMix). A Stokes drift module is also implemented in GOTM to provide the necessary ocean surface waves information to the Langmuir turbulence parameterizations, as well as to facilitate future development and evaluation of new Langmuir turbulence parameterizations. In addition, a streamlined workflow with Python and Jupyter Notebook is also described, enabled by the newly developed and more flexible configuration capability of GOTM. The newly implemented Langmuir turbulence parameterizations are evaluated against theoretical scalings and available observations in four test cases, including an idealized wind-driven entrainment case and three realistic cases at ocean station Papa, the northern North Sea and the central Gotland Sea, and compared with the existing General Length Scale scheme in GOTM. The results are consistent with previous studies. This development extends the capability of GOTM towards including the effects of ocean surface waves and provides useful toolsets for the ocean modeling community to further study the effects of Langmuir turbulence in a broader scope.

Qing Li et al.

Status: open (extended)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2020-437', Anonymous Referee #1, 02 Apr 2021 reply

Qing Li et al.

Model code and software

General Ocean Turbulence Model (Version v6.0.0) Karsten Bolding, Jorn Bruggeman, Hans Burchard, and Lars Umlauf https://doi.org/10.5281/zenodo.4541583

Python tools for working with GOTM in Jupyter Notebook Qing Li https://doi.org/10.5281/zenodo.4314038

Jupyter notebooks and data for "Integrating CVMix into GOTM (v6.0): A consistent framework for testing, comparing, and applying ocean mixing schemes" Qing Li https://doi.org/10.5281/zenodo.4314036

Qing Li et al.

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Short summary
Different ocean vertical mixing schemes are usually developed in different modeling framework, making the comparison across such schemes difficult. Here we develop a consistent framework for testing, comparing and applying different ocean mixing schemes by integrating CVMix into GOTM, which also extends the capability of GOTM towards including the effects of ocean surface waves. A suite of test cases and toolsets for developing and evaluating ocean mixing schemes are also described.