Ocean Science
Ocean Science
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Articles | Volume 19, issue 2
Articles | Volume 19, issue 2
https://doi.org/10.5194/os-19-305-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/os-19-305-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 2
Research article
 | 
17 Mar 2023
Research article |  | 17 Mar 2023

Effects of including the adjoint sea ice rheology on estimating Arctic Ocean–sea ice state

Guokun Lyu, Armin Koehl, Xinrong Wu, Meng Zhou, and Detlef Stammer

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Short summary
Data assimilation techniques are important for combining observations with numerical models. Here, we approximate the adjoint of viscous-plastic dynamics (adjoint-VP) to replace the adjoint of free-drift dynamics (adjoint-FD) for developing an advanced Arctic Ocean and sea ice modeling and adjoint-based assimilation system. We find that adjoint-VP provides a better ocean and sea ice estimation than adjoint-FD, considering the residual errors and adjustments of the atmospheric states.
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Special issue
Data assimilation techniques and applications in coastal and...