Sea ice growth rates from tide-driven visible banding

• Main Authors: KE Turner (11814035), IJ Smith (11814038), J-L Tison (11814041), V Verbeke (11814044), Mark McGuinness (8508825), Malcolm Ingham (8508762), R Vennell (11814047), Harry Trodahl (8510619)
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: 2017
• Subjects: Uncategorized; 13 Climate Action; Science & Technology; Physical Sciences; Oceanography; THERMAL-CONDUCTIVITY; MCMURDO SOUND; PLATELET ICE; MICROSTRUCTURE; TEMPERATURE; ANTARCTICA; DEPTH; Meteorology & Atmospheric Sciences; McMurdo Sound; Antarc*; Antarctica; ice core; Sea ice
• Online Access: https://doi.org/10.25455/wgtn.17148191.v1

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.