The time capsule is a CTD generously donated by the company RBR. It weighs 1 kg, measures 40 cm x 6.4 cm, is designed to sustain a hydrostatic water pressure of 740 m and floats with the 22-letter pay load. A preliminary data analysis of the model output from Deconto et al suggests that the capsule would not penetrate deep into the ice sheet for a 1000-year time scale. If the CTD ends up in water, it will become an ocean drifter.
Letters to the Future, Antarctica, 2018 andthe contributors’ names have been engraved on the capsule.