23 Nov 2022
23 Nov 2022
Status: this preprint is open for discussion.

Conservation of heat and mass in P-SKRIPS version 1: the coupled atmosphere-ice-ocean model of The Ross Sea

Alena Malyarenko1,2,, Alexandra Gossart2,, Rui Sun3, and Mario Krapp4,2 Alena Malyarenko et al.
  • 1National Institute of Water and Atmospheric Research | Taihoro Nukurangi , 301 Evans Bay Parade, Hataitai, Wellington, New Zealand
  • 2Antarctic Research Centre | Te Puna Pātiotio, Victoria University of Wellington, CO 549, Cotton Building, Gate 7, Kelburn Parade, Wellington, 6012, New Zealand
  • 3Scripps Institution of Oceanography, La Jolla, California, USA
  • 4GNS Science | Te Pū Ao, 30 Gracefield Rd, Gracefield, Lower Hutt 5010, New Zealand
  • These authors contributed equally to this work.

Abstract. Ocean-atmosphere-sea ice interactions are key to understanding the future of the Southern Ocean and the Antarctic continent. Regional coupled climate-sea ice-ocean models have been developed for several polar regions, however the conservation of heat and mass fluxes between coupled models is often overlooked due to computational difficulties. At regional scale, the non-conservation of water and energy can lead to model drift over multi-year model simulations. Here we present P-SKRIPS version 1, a new version of the SKRIPS coupled model set up for the Ross Sea region. Our development includes a full conservation of heat and mass fluxes transferred between the climate (PWRF) and sea ice-ocean (MITgcm) models. We examine open water, sea ice cover, and ice sheet interfaces. We show the evidence of the flux conservation in the results of a one month-long summer and one month-long winter test experiments. P-SKRIPS shows the advantages of conserving heat flux over the Terra Nova Bay and Ross Sea polynyas in August 2016, eliminating the mismatch between total flux calculation in PWRF and MITgcm up to 922 W m-2.

Alena Malyarenko et al.

Status: open (until 18 Jan 2023)

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Alena Malyarenko et al.

Model code and software

P-SKRIPS A. Malyarenko, A. Gossart

Alena Malyarenko et al.


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Short summary
Simultaneous modelling of ocean, sea ice and atmosphere in coupled models is critical for understanding all of the processes that happen in the Antarctic. Here we have developed a coupled model for the Ross Sea, P-SKRIPS, that conserves heat and mass between the ocean and sea ice model (MITgcm) and the atmosphere model (PWRF). We have shown that our developments reduce the model drift, which is important for long-term simulations. P-SKRIPS shows good results in modelling coastal polynyas.