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


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Svenja Lange on behalf of the Authors (16 Sep 2016)  Author's response
ED: Publish subject to technical corrections (06 Oct 2016) by Dan Goldberg
AR by Eric Larour on behalf of the Authors (06 Oct 2016)  Author's response    Manuscript
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.