Preprints
https://doi.org/10.5194/gmd-2023-236
https://doi.org/10.5194/gmd-2023-236
Submitted as: development and technical paper
 | 
08 Jan 2024
Submitted as: development and technical paper |  | 08 Jan 2024
Status: this preprint is currently under review for the journal GMD.

Development of a total variation diminishing (TVD) Sea ice transport scheme and its application in an ocean (SCHISM v5.11) and sea ice (Icepack v1.3.4) coupled model on unstructured grids

Qian Wang, Fei Chai, Yang Zhang, Yinglong Joseph Zhang, and Lorenzo Zampieri

Abstract. As the demand for increased resolution and complexity in unstructured sea ice models is growing, a more advanced sea ice transport scheme is needed. In this study, we couple the Semi-implicit Cross-scale Hydro-science Integrated System Model (SCHISM) with Icepack, the column physics package of the sea ice model CICE; a key step is to implement a total variation diminishing (TVD) transport scheme for the multi-class sea ice module in the coupled model. Compared with the upwind scheme and a central difference scheme, the TVD transport scheme is found to have better performance for both idealized and realistic cases, and meets the requirements for conservation, accuracy, efficiency (even with very high resolution), and strict monotonicity. The coupled model for the Arctic Ocean successfully reproduces the long-term changes in the sea ice extent, the sea ice boundary and concentration observation from the satellite.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Qian Wang, Fei Chai, Yang Zhang, Yinglong Joseph Zhang, and Lorenzo Zampieri

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2023-236', Anonymous Referee #1, 24 Jan 2024
    • AC1: 'Reply on RC1', Qian Wang, 11 Apr 2024
  • RC2: 'Comment on gmd-2023-236', Anonymous Referee #2, 10 Feb 2024
    • AC2: 'Reply on RC2', Qian Wang, 11 Apr 2024
Qian Wang, Fei Chai, Yang Zhang, Yinglong Joseph Zhang, and Lorenzo Zampieri
Qian Wang, Fei Chai, Yang Zhang, Yinglong Joseph Zhang, and Lorenzo Zampieri

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Short summary
We coupled an unstructured hydro model with an advanced column sea ice model to meet the growing demand for increased resolution and complexity in unstructured sea ice models. Additionally, we present a novel tracer transport scheme for the sea ice coupled model, and demonstrate that this scheme fulfills the requirements for conservation, accuracy, efficiency, and monotonicity in an idealized test. Our new coupled model also has good performance in realistic tests.