Articles | Volume 19, issue 15
https://doi.org/10.5194/gmd-19-7169-2026
https://doi.org/10.5194/gmd-19-7169-2026
Development and technical paper
 | 
05 Aug 2026
Development and technical paper |  | 05 Aug 2026

Design and implementation of a Newtonian relaxation scheme in the NOAA GFDL Sea Ice Model (SIS2)

Dmitry S. Dukhovskoy, Theresa Cordero, Katherine Hedstrom, Michael Alexander, Michael Jacox, Robert Hallberg, Matthew Harrison, and Jessie Liu

Data sets

ERA5 hourly data on single levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

RC4USCoast: A river chemistry dataset for regional ocean model application in the U.S. East, Gulf of Mexico, and West Coasts from 1950-01-01 to 2022-12-31 Fabian A. Gomez et al. https://doi.org/10.25921/9jfw-ph50

Model code and software

NOAA GFDL MOM6-SIS2-BGC model code D. Dukhovskoy et al. https://doi.org/10.5281/zenodo.19338655

Analysis codes for initial submission of "Design and Implementation of a Newtonian Relaxation Scheme in the NOAA GFDL Sea Ice Model (SIS2)" to GMD D. Dukhovskoy et al. https://doi.org/10.5281/zenodo.18686644

Empirical Seawater Property Estimation Routines, accepted (Version v0) B. R. Carter https://doi.org/10.5281/zenodo.5512697

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Short summary
Regional sea ice models often struggle to represent sea ice near model domain boundaries, where errors can accumulate over time. We implemented and tested a method that gradually adjusts simulated sea ice toward prescribed conditions while preserving a realistic evolution of the ice cover. Experiments in the Arctic and Northeast Pacific show improved sea ice simulations and ocean surface conditions, providing a practical tool for regional forecasting and research applications.
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