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Sea ice growth rates from tide-driven visible banding

par Turner, Kate K.E.;Smith, Inga I.J.;Tison, Jean-Louis ;Verbeke, Véronique ;McGuinness, Mark;Ingham, Malcolm;Vennell, Ross;Trodahl, Joe
Référence Journal of geophysical research. Oceans, 122, 6, page (4675-4684)
Publication Publié, 2017-06

Article révisé par les pairs

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Résumé :

In this paper, periodic tide-current-driven banding in a sea-ice core is demonstrated as a measure of the growth rate of first-year sea ice at congelation-ice depths. The study was performed on a core from the eastern McMurdo Sound, exploiting the well-characterized tidal pattern at the site. It points the way to a technique for determining early-season ice growth rates from late-season cores, in areas where under ice currents are known to be tidally dominated and the ice is landfast, thus providing data for a time of year when thin ice prevents direct thickness (and therefore growth rate) measurements. The measured results were compared to the growth-versus-depth predicted by a thermodynamic model.