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Investigating the Effect of Snow-Ice Formation on Snow Depth and Density over Arctic Sea Ice
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  • Ioanna Merkouriadi,
  • Glen Liston,
  • Arttu Jutila,
  • Heidi Sallila,
  • Andreas Preußer
Ioanna Merkouriadi
Finnish Meteorological Institute

Corresponding Author:[email protected]

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Glen Liston
Colorado State University
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Arttu Jutila
Finnish Meteorological Institute
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Heidi Sallila
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Andreas Preußer
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research
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We examined the effect of snow-ice formation on SnowModel-LG snow depth and density products. We coupled SnowModel-LG, a modeling system adapted for snow depth and density reconstruction over sea ice, with HIGHTSI, a 1-D thermodynamic sea ice model, to create SnowModel-LG_HS. Pan-Arctic model simulations spanned from 1 August 1980 through 31 July 2022. In SnowModel-LG_HS, domain average snow depth decreased by 20%, and snow density increased by 2% when compared to SnowModel-LG, with largest differences in the Atlantic sector. Averaged across the CryoSat-2 era (2011–2022), domain average April sea ice thickness retrievals from CryoSat-2 decreased by 7.7% when snow-ice was accounted for. Evaluation of SnowModel-LG HS against snow depth, snow-ice, and sea ice thickness observations highlighted the importance of snow redistribution over deformed sea ice. The findings suggest that neglecting snow and sea ice interactions in models can lead to substantial overestimation of snow depth over level ice.
20 Dec 2023Submitted to ESS Open Archive
27 Dec 2023Published in ESS Open Archive