2019-2020 USAP Field Season
Stability and instability--records of external drivers and resulting behavior of Thwaites Glacier
Dr. Julia Smith Wellner
Dr. Robert Larter
Supporting Stations: RV/IB Nathaniel B. Palmer
This project will conduct marine and sub-ice shelf research to: (1) establish boundary conditions seaward of the Thwaites Glacier grounding line; (2) obtain records of past external drivers of glacier change; and (3) determine the history of past changes in grounding-line migration and conditions at the glacier base. These objectives will be achieved through high-resolution geophysical surveys of the seafloor and analysis of sediment cores from the inner shelf seaward of the Thwaites Glacier grounding line. The team will use ship-based equipment and a corer deployed through the ice shelf via hot water drill holes. The results will be incorporated into numerical ocean/ice-sheet models and will improve projections of ice loss and sea-level rise originating from the glacier.
Field Season Overview
The planned cruise will take place on the NBP in early 2020. Thirty-one science days are planned for THOR research in the Amundsen Sea and close to Thwaites Glacier. Work will include seismic data collection, multibeam swath bathymetry, 3.5 kHz profiles, and all types of sediment cores.
Deploying Team Members