A suite of coupled ocean-sea ice simulations examining the effect of regime shift in sea-ice thickness distribution on ice–ocean interaction in the Arctic Ocean

Sumata, Hiroshi; Granskog, Mats A.; Duarte, Pedro

doi:10.5194/gmd-19-647-2026

Articles | Volume 19, issue 2

https://doi.org/10.5194/gmd-19-647-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-19-647-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 2

Model experiment description paper

|

22 Jan 2026

Model experiment description paper |

| 22 Jan 2026

A suite of coupled ocean-sea ice simulations examining the effect of regime shift in sea-ice thickness distribution on ice–ocean interaction in the Arctic Ocean

Hiroshi Sumata, Mats A. Granskog, and Pedro Duarte

Supplement

https://doi.org/10.5194/gmd-19-647-2026-supplement

Data sets

Monthly sea ice thickness distribution in Fram Strait H. Sumata https://doi.org/10.21334/NPOLAR.2022.B94CB848

Weaker dynamical coupling between sea ice and ocean in a thinner Arctic sea ice regime - Model input, boundary and forcing files v1.0 H. Sumata et al. https://doi.org/10.21334/NPOLAR.2025.70C53C63

Model code and software

metno/metroms: Version 0.4.1 (v0.4.1) J. Debernard et al. https://doi.org/10.5281/zenodo.5067164

MCT, CICE and ROMS code used with for the S4K simulations (v1.1) P. Duarte https://doi.org/10.5281/zenodo.5815093

Short summary

A major shift in Arctic sea ice occurred in 2007, transitioning from thicker, deformed ice to thinner, more uniform ice with reduced surface roughness. This abrupt change likely altered the dynamic and thermodynamic interactions between sea ice and ocean. We present a suite of regional coupled ocean-sea ice simulations designed to assess the potential impact of the regime shift on sea ice-ocean interactions, with a regional focus on the Atlantic sector of the Arctic Ocean.