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

• Published in: Geoscientific Model Development
• Main Authors: C. Pelletier, T. Fichefet, H. Goosse, K. Haubner, S. Helsen, P.-V. Huot, C. Kittel, F. Klein, S. Le clec'h, N. P. M. van Lipzig, S. Marchi, F. Massonnet, P. Mathiot, E. Moravveji, E. Moreno-Chamarro, P. Ortega, F. Pattyn, N. Souverijns, G. Van Achter, S. Vanden Broucke, A. Vanhulle, D. Verfaillie, L. Zipf
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2022
• Subjects: Geology; QE1-996.5; Antarctic; Southern Ocean; The Antarctic; Antarc*; Ice Sheet; Ice Shelf; Sea ice
• Online Access: https://doi.org/10.5194/gmd-15-553-2022; https://doaj.org/article/415fe3ba4f8d43658e85e93fc7db1438

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 <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">1</mn><mo>/</mo><mn mathvariant="normal">4</mn><msup><mi/><mo>∘</mo></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="25pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="2ffb54fd47338101d9ca2eed2cade549"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="gmd-15-553-2022-ie00001.svg" width="25pt" height="14pt" src="gmd-15-553-2022-ie00001.png"/></svg:svg> . 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 ...