Sea ice growth rates from tide-driven visible banding
journal contributionposted on 08.12.2021, 22:09 by KE Turner, IJ Smith, J-L Tison, V Verbeke, Mark McGuinnessMark McGuinness, Malcolm InghamMalcolm Ingham, R Vennell, Harry TrodahlHarry Trodahl
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.