AMIGOS-3 multi-sensor stations and the climate, ice, and ocean conditions at Thwaites Eastern Ice Shelf during 2020-2022

The Automated Meteorology – Ice – Geophysics Observation System 3 (AMIGOS-3) is a multi-sensor on-ice ocean mooring and weather, camera, and precision GPS measurement station, controlled by a Python script. The station is designed to be deployed on floating ice in the polar regions and operate unattended for up to several years. Ocean mooring sensors (Seabird MicroCAT and Nortek Aquadopp) record conductivity, temperature, and depth (CTD; reported at 10-minute intervals), and current velocity (hourly intervals). A Silixa XT fiber-optic Distributed Temperature Sensing (DTS) system provides a temperature profile time-series through the ice and ocean column with a cadence of 6/day to 1/week depending on available station power. A subset of the station data is telemetered by Iridium modem. Two-way communication, using both single-burst data and file transfer protocols, facilitates station data collection changes and power management. Power is supplied by solar panels and a sealed lead-acid battery system. Two AMIGOS-3 systems were installed on the Thwaites Eastern Ice Shelf (TEIS) in January 2020, providing data well into 2022. We discuss the components of the system and present several of the data sets, summarizing observed climate, ice, and ocean conditions.