Late spring 2018 land-fast sea ice and sub-ice platelet layer thicknesses from electromagnetic induction soundings along transect West-East-EM-Transect_20181107 in McMurdo Sound, Antarctica

• Main Authors: Brett, Gemma Marie, Leonard, Gregory H, Rack, Wolfgang, Irvin, Anne, Haas, Christian, Langhorne, Patricia J
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: Antarctic sea ice; DATE/TIME; DEEP SOUTH NATIONAL SCIENCE CHALLENGE: Targeted observation and process-informed modelling of Antarctic sea ice; electromagnetic induction; Electromagnetic sounding (EM); Geonics Ltd EM31-MK2; GEM; Ground-based electromagnetic induction; ice-ocean interaction; ice thickness; Identification; LATITUDE; LONGITUDE; McMurdo; Sea ice thickness; Sub-ice platelet layer; Sub-ice platelet-layer thickness; TOPIMASI; West-East-EM-Transect_20181107; Antarctic; McMurdo Sound; Antarc*; Antarctica; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.968705

Ground-based electromagnetic induction (EM) time-series measurements of land-fast sea ice and sub-ice platelet layer thickness distributions were carried out on land-fast sea ice in McMurdo Sound, Antarctica late spring (November 01-19) of 2018. Repeated west to east EM transects were carried out across McMurdo Sound along latitude 77.767°S. The EM data was acquired using a frequency-domain Geonics Ltd EM31-MK2 instrument mounted on a sledge and towed by skidoo. The thicknesses of consolidated ice (sea ice plus the snow layer) and the SPL were simultaneously retrieved from the EM31 measured response using the processing method of Irvin (2018). Variability in EM thicknesses detected significant growth of sub-ice platelet layer over the 18-day survey period.