Monthly average profiles of Distributed Temperature Sensing at Thwaites Eastern Ice Shelf

Monthly average profiles of Distributed Temperature Sensing (DTS) for Thwaites Eastern Ice Shelf used in Dotto et al. (under review). The profiles are from April 2020, September 2020 and February 2021 and cover the ice-shelf-ocean interface depths. DTS utilizes a fibre-optic cable installed within the ice and through the ocean, and it uses Raman backscattered photons to estimate the in situ temperature of the fiber (Hausner et al 2011). The DTS interrogators (Silixa XT-DTS, Silixa LLC. Elstree, UK) used a spatial sampling of 25 cm. Each DTS profile uses a 1-minute integration time to reduce signal to noise. Independent temperature measurements from the MicroCATs are employed to calibrate the backscatter signal (Tyler et al., 2013; Hausner et al 2011).

Hausner, M. B., Suárez, F., Glander, K. E., van de Giesen, N., Selker, J. S. & Tyler, S. W. Calibrating single-ended fiber-optic Raman spectra distributed temperature sensing data. Sensors (Basel), 11(11), 10,859–10,879 (2011).

Tyler, S. W., Holland, D. M., Zagorodnov, V., Stern, A. A., Sladek, C., Kobs, S., White, S., Suárez, F. & Bryenton, J. Using distributed temperature sensors to monitor an Antarctic ice shelf and sub-ice-shelf cavity. Journal of Glaciology, 59(215), 583–591 (2013).

Dotto, T. S., Heywood, K., Hall, R. et al. Ocean variability beneath Thwaites Eastern Ice Shelf driven by the Pine Island Bay Gyre strength, 11 October 2022, PREPRINT (Version 1) available at Research Square [https://doi.org/10.21203/rs.3.rs-1466534/v1]