PARASO, a circum-Antarctic fully coupled ice-sheet-ocean-sea-ice-atmosphere-land model involving f.ETISh1.7, NEMO3.6, LIM3.6, COSMO5.0 and CLM4.5 - Archive ouverte HAL Access content directly
Journal Articles Geoscientific Model Development Year : 2022

PARASO, a circum-Antarctic fully coupled ice-sheet-ocean-sea-ice-atmosphere-land model involving f.ETISh1.7, NEMO3.6, LIM3.6, COSMO5.0 and CLM4.5

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Charles Pelletier
  • Function : Author
Thierry Fichefet
  • Function : Author
Hugues Goosse
  • Function : Author
Konstanze Haubner
  • Function : Author
Samuel Helsen
  • Function : Author
Pierre-Vincent Huot
  • Function : Author
Christoph Kittel
  • Function : Author
François Klein
  • Function : Author
Sébastien Le Clec'H
  • Function : Author
Nicole P. M. van Lipzig
  • Function : Author
Sylvain Marchi
  • Function : Author
François Massonnet
  • Function : Author
Ehsan Moravveji
  • Function : Author
Eduardo Moreno-Chamarro
  • Function : Author
Pablo Ortega
  • Function : Author
Frank Pattyn
  • Function : Author
Niels Souverijns
  • Function : Author
Guillian van Achter
  • Function : Author
Sam Vanden Broucke
  • Function : Author
Alexander Vanhulle
  • Function : Author
Deborah Verfaillie
  • Function : Author
Lars Zipf
  • Function : Author

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. 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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insu-03706399 , version 1 (27-06-2022)

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Attribution - CC BY 4.0

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Charles Pelletier, Thierry Fichefet, Hugues Goosse, Konstanze Haubner, Samuel Helsen, et al.. PARASO, a circum-Antarctic fully coupled ice-sheet-ocean-sea-ice-atmosphere-land model involving f.ETISh1.7, NEMO3.6, LIM3.6, COSMO5.0 and CLM4.5. Geoscientific Model Development, 2022, 15, pp.553-594. ⟨10.5194/gmd-15-553-2022⟩. ⟨insu-03706399⟩
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