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arXiv · 1810.03657

Adaptation of NEMO-LIM3 model for multigrid high resolution Arctic simulation

Alexander Hvatov·Nikolay O. Nikitin·Anna V. Kalyuzhnaya·Sergey S. Kosukhin
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Abstract

High-resolution regional hindcasting of ocean and sea ice plays an important role in the assessment of shipping and operational risks in the Arctic Ocean. The ice-ocean model NEMO-LIM3 was modified to improve its simulation quality for appropriate spatio-temporal resolutions. A multigrid model setup with connected coarse- (14 km) and fine-resolution (5 km) model configurations was devised. These two configurations were implemented and run separately. The resulting computational cost was lower when compared to that of the built-in AGRIF nesting system. Ice and tracer boundary-condition schemes were modified to achieve the correct interaction between coarse- and fine grids through a long ice-covered open boundary. An ice-restoring scheme was implemented to reduce spin-up time. The NEMO-LIM3 configuration described in this article provides more flexible and customisable tools for high-resolution regional Arctic simulations.

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Alexander Hvatov, Nikolay O. Nikitin, Anna V. Kalyuzhnaya, Sergey S. Kosukhin. 2018-10-08. Adaptation of NEMO-LIM3 model for multigrid high resolution Arctic simulation. https://doi.org/10.1016/j.ocemod.2019.101427

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