An ice-tethered, non-floating Trident Sensors Helix Beacon during SCALE 2019 Spring Cruise

Brief data description A Trident Sensors Helix Beacon identical to the one described in Womack et al. (2022), was deployed on sea ice at latitude 59.47o S and longitude 10.89o E, on 30 October 2019, as part of the Southern oCean seAsonal Experiment (SCALE; Ryan-Keogh and Vichi, 2022) aboard the SA Agulhas II. The region where the Trident was deployed (Antarctic marginal ice zone) consisted of first-year ice conditions, with an average thickness of 80-90 cm. The device was deployed by hand by three people, lowered by crane from the ship to the ice on a basket cradle. The temporal resolution was approximately four hours. The survival of the Trident depended on staying fixed to the ice floe and its battery life. The Trident recorded GPS position and air temperature, and transmitted data until 2 December 2019, where it sank due to sea-ice melting. Buoy name and raw data: Trident: Unit4.xlsx Related code: The buoy data has been processed using https://github.com/mvichi/antarctic-buoys/.