Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 9, issue 11
Articles | Volume 9, issue 11
https://doi.org/10.5194/gmd-9-3907-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/gmd-9-3907-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 9, issue 11
Development and technical paper
 | 
01 Nov 2016
Development and technical paper |  | 01 Nov 2016

An approach to computing discrete adjoints for MPI-parallelized models applied to Ice Sheet System Model 4.11

Eric Larour, Jean Utke, Anton Bovin, Mathieu Morlighem, and Gilberto Perez

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Short summary
We present an approach to derive the adjoint state of the C++ coded Ice Sheet System Model. The approach enables data assimilation of observations to improve projections of polar ice sheet mass balance and contribution to sea-level rise. It is applicable to other Earth science frameworks relying on C++ and parallel computing, is non-intrusive, and enables computation of transient adjoints for any type of physics, hence providing insights into the sensitivities of any model to its inputs.
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