A derivative-free optimisation method for global ocean biogeochemical models

Oliver, Sophy; Cartis, Coralia; Kriest, Iris; Tett, Simon F. B; Khatiwala, Samar

doi:https://doi.org/10.5194/gmd-15-3537-2022

Articles | Volume 15, issue 9

https://doi.org/10.5194/gmd-15-3537-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The Transport Matrix Method (TMM) for ocean biogeochemical...

https://doi.org/10.5194/gmd-15-3537-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 9

Methods for assessment of models

|

05 May 2022

Methods for assessment of models |

| 05 May 2022

A derivative-free optimisation method for global ocean biogeochemical models

Sophy Oliver, Coralia Cartis, Iris Kriest, Simon F. B Tett, and Samar Khatiwala

Data sets

Code and data archive to accompany "A derivative-free optimisation method for global ocean biogeochemical models", Oliver et. al. 2021 Sophy Oliver, Coralia Cartis, Iris Kriest, Simon F. B. Tett, and Samar Khatiwala https://doi.org/10.5281/zenodo.5517626

Model code and software

samarkhatiwala/tmm: Version 2.0 of the Transport Matrix Method software Samar Khatiwala https://doi.org/10.5281/zenodo.1246300

MITgcm 2.8deg Transport Matrix configuration Samar Khatiwala https://doi.org/10.5281/zenodo.5517238

OPTCLIMSO Optimisation Framework Sophy Oliver and Simon F. B. Tett https://doi.org/10.5281/zenodo.5517610

Short summary

Global ocean biogeochemical models are used within Earth system models which are used to predict future climate change. However, these are very computationally expensive to run and therefore are rarely routinely improved or calibrated to real oceanic observations. Here we apply a new, fast optimisation algorithm to one such model and show that it can calibrate the model much faster than previously managed, therefore encouraging further ocean biogeochemical model improvements.