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Article Dans Une Revue The Cryosphere Discussions Année : 2013

Technical Note: On the use of the mushy-layer Rayleigh number for the interpretation of sea-ice-core data

Résumé

We examine some practical aspects of using a mushy-layer Rayleigh number for the interpretation of sea-ice-core data. In principle, such analysis should allow one to determine convectively active regions within the ice core by identifying those regions in which the mush-Rayleigh number is super-critical. In practice, however, a quantitative analysis is complicated by uncertainties regarding the specific formulation of both the mush-Rayleigh number itself and of the sea-ice permeability that is crucial for quantifying the Rayleigh number. Additionally, brine loss from highly permeable sections of the ice core, in particular close to the ice-ocean interface, and typically weekly ice core sampling, limit the practical applicability of the Rayleigh number for ice-core interpretation. We here quantify these uncertainties, suggest a standard method for the computation of the Rayleigh number for sea ice and discuss possibilities and limitations of ice-core interpretation based on the Rayleigh number.
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hal-00912614 , version 1 (17-03-2022)

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Martin Vancoppenolle, Dirk Notz, Frédéric Vivier, Jean-Louis Tison, Bruno Delille, et al.. Technical Note: On the use of the mushy-layer Rayleigh number for the interpretation of sea-ice-core data. The Cryosphere Discussions, 2013, 7, pp.3209-3230. ⟨10.5194/TCD-7-3209-2013⟩. ⟨hal-00912614⟩
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