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PARASO, a circum-Antarctic fully coupled ice-sheet-ocean-sea-ice-atmosphere-land model involving f.ETISh1.7, NEMO3.6, LIM3.6, COSM05.0 and CLM4.5
Pelletier, C.; Fichefet, T.; Goosse, H.; Haubner, K.; Helsen, S.; Huot, P.-V.; Kittel, C.; Klein, F.; Le Clec'h, S.; van Lipzig, N.P.M.; Marchi, S.; Massonnet, F.; Mathiot, P.; Moravveji, E.; Moreno-Chamarro, E.; Ortega, P.; Pattyn, F.; Souverijns, N.; Van Achter, G.; Vanden Broucke, S.; Vanhulle, A.; Verfaillie, D.; Zipf, L. (2022). PARASO, a circum-Antarctic fully coupled ice-sheet-ocean-sea-ice-atmosphere-land model involving f.ETISh1.7, NEMO3.6, LIM3.6, COSM05.0 and CLM4.5. Geosci. Model Dev. 15(2): 553-594. https://dx.doi.org/10.5194/gmd-15-553-2022
In: Geoscientific Model Development. Copernicus Publications: Göttingen. ISSN 1991-959X; e-ISSN 1991-9603, meer
Peer reviewed article  
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  • Le Clec'h, S., meer
  • van Lipzig, N.P.M.
  • Marchi, S., meer
  • Massonnet, F., meer
  • Mathiot, P., meer
  • Moravveji, E., meer
  • Moreno-Chamarro, E.
  • Ortega, P.
  • Pattyn, F., meer
  • Souverijns, N., meer
  • Van Achter, G., meer
  • Vanden Broucke, S., meer
  • Vanhulle, A., meer
  • Verfaillie, D., meer
  • Zipf, L., meer
Abstract
    We introduce PARASO, a novel five-component fully coupled regional climate model over an Antarctic circumpolar domain covering the full Southern Ocean. The state-of-the-art models used are the fast Elementary Thermomechanical Ice Sheet model (f.ETISh) v1.7 (ice sheet), the Nucleus for European Modelling of the Ocean (NEMO) v3.6 (ocean), the Louvain-la-Neuve sea-ice model (LIM) v3.6 (sea ice), the COnsortium for Small-scale MOdeling (COSMO) model v5.0 (atmosphere) and its CLimate Mode (CLM) v4.5 (land), which are here run at a horizontal resolution close to 1/4 degrees. One key feature of this tool resides in a novel two-way coupling interface for representing ocean- ice-sheet interactions, through explicitly resolved ice-shelf cavities. The impact of atmospheric processes on the Antarctic ice sheet is also conveyed through computed COSMO-CLM-f.ETISh surface mass exchange. In this technical paper, we briefly introduce each model's configuration and document the developments that were carried out in order to establish PARASO. The new offline-based NEMO-f.ETISh coupling interface is thoroughly described. Our developments also include a new surface tiling approach to combine open-ocean and sea-ice-covered cells within COSMO, which was required to make this model relevant in the context of coupled simulations in polar regions. We present results from a 2000-2001 coupled 2-year experiment. PARASO is numerically stable and fully operational. The 2-year simulation conducted without fine tuning of the model reproduced the main expected features, although remaining systematic biases provide perspectives for further adjustment and development.
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