Articles | Volume 18, issue 22
https://doi.org/10.5194/gmd-18-9167-2025
https://doi.org/10.5194/gmd-18-9167-2025
Methods for assessment of models
 | 
27 Nov 2025
Methods for assessment of models |  | 27 Nov 2025

Quantifying coupling errors in atmosphere-ocean-sea ice models: A study of iterative and non-iterative approaches in the EC-Earth AOSCM

Valentina Schüller, Florian Lemarié, Philipp Birken, and Eric Blayo

Related authors

wavetrisk-2.1: an adaptive dynamical core for ocean modelling
Nicholas K.-R. Kevlahan and Florian Lemarié
Geosci. Model Dev., 15, 6521–6539, https://doi.org/10.5194/gmd-15-6521-2022,https://doi.org/10.5194/gmd-15-6521-2022, 2022
Short summary
Jarzynski equality and Crooks relation for local models of air–sea interaction
Achim Wirth and Florian Lemarié
Earth Syst. Dynam., 12, 689–708, https://doi.org/10.5194/esd-12-689-2021,https://doi.org/10.5194/esd-12-689-2021, 2021
Short summary
A Schwarz iterative method to evaluate ocean–atmosphere coupling schemes: implementation and diagnostics in IPSL-CM6-SW-VLR
Olivier Marti, Sébastien Nguyen, Pascale Braconnot, Sophie Valcke, Florian Lemarié, and Eric Blayo
Geosci. Model Dev., 14, 2959–2975, https://doi.org/10.5194/gmd-14-2959-2021,https://doi.org/10.5194/gmd-14-2959-2021, 2021
Short summary
A simplified atmospheric boundary layer model for an improved representation of air–sea interactions in eddying oceanic models: implementation and first evaluation in NEMO (4.0)
Florian Lemarié, Guillaume Samson, Jean-Luc Redelsperger, Hervé Giordani, Théo Brivoal, and Gurvan Madec
Geosci. Model Dev., 14, 543–572, https://doi.org/10.5194/gmd-14-543-2021,https://doi.org/10.5194/gmd-14-543-2021, 2021
Short summary

Cited articles

Connors, J. M. and Ganis, B.: Stability of Algorithms for a Two Domain Natural Convection Problem and Observed Model Uncertainty, Comput. Geosci., 15, 509–527, https://doi.org/10.1007/s10596-010-9219-x, 2011. a, b
Craig, A., Valcke, S., and Coquart, L.: Development and performance of a new version of the OASIS coupler, OASIS3-MCT_3.0, Geosci. Model Dev., 10, 3297–3308, https://doi.org/10.5194/gmd-10-3297-2017, 2017. a, b
Döscher, R., Acosta, M., Alessandri, A., Anthoni, P., Arsouze, T., Bergman, T., Bernardello, R., Boussetta, S., Caron, L.-P., Carver, G., Castrillo, M., Catalano, F., Cvijanovic, I., Davini, P., Dekker, E., Doblas-Reyes, F. J., Docquier, D., Echevarria, P., Fladrich, U., Fuentes-Franco, R., Gröger, M., v. Hardenberg, J., Hieronymus, J., Karami, M. P., Keskinen, J.-P., Koenigk, T., Makkonen, R., Massonnet, F., Ménégoz, M., Miller, P. A., Moreno-Chamarro, E., Nieradzik, L., van Noije, T., Nolan, P., O'Donnell, D., Ollinaho, P., van den Oord, G., Ortega, P., Prims, O. T., Ramos, A., Reerink, T., Rousset, C., Ruprich-Robert, Y., Le Sager, P., Schmith, T., Schrödner, R., Serva, F., Sicardi, V., Sloth Madsen, M., Smith, B., Tian, T., Tourigny, E., Uotila, P., Vancoppenolle, M., Wang, S., Wårlind, D., Willén, U., Wyser, K., Yang, S., Yepes-Arbós, X., and Zhang, Q.: The EC-Earth3 Earth system model for the Coupled Model Intercomparison Project 6, Geosci. Model Dev., 15, 2973–3020, https://doi.org/10.5194/gmd-15-2973-2022, 2022. a
ECMWF: IFS Documentation CY40R1, IFS Documentation, ECMWF, https://doi.org/10.21957/f56vvey1x, 2014. a, b, c, d
European Union-Copernicus Marine Service: Global Ocean Physics Reanalysis, Copernicus Marine Service, https://doi.org/10.48670/MOI-00021, 2018. a, b
Download
Short summary
Earth system models consist of many components, coupled in time and space. Standard coupling algorithms introduce a numerical error, which one can compute with iterative coupling methods. We use such a method for a coupled model of a single vertical column of the atmosphere, ocean, and sea ice. We find that coupling errors in the atmosphere and at the ice surface can be substantial and that discontinuous physics parameterizations lead to convergence issues of the iteration.
Share