2022-2023 USAP Field Season
Thwaites Interdisciplinary Margin Evolution (TIME): the role of shear margin dynamics in the future evolution of the Thwaites Drainage Basin
Dr. Slawek M Tulaczyk
Dr. Poul Christoffersen
Project Web Site:
Supporting Stations: McMurdo Station
The Thwaites Interdisciplinary Margin Evolution (TIME) project is a part of the International Thwaites Glacier Collaboration (ITGC), a multi-disciplinary effort led by the U.S. and U.K. Antarctic programs. The project will test the overarching hypothesis that shear-margin dynamics may exert powerful control over the evolution of ice flow in the Thwaites Drainage Basin. The work will combine geophysical data collection on the Eastern Shear Margin (ESM) of Thwaites Glacier with shear margin modeling and basin-scale numerical investigations of future sea-level contributions. Fieldwork includes data collection from passive seismic instrument arrays, active seismic experiments, and radar surveys.
Field Season Overview
A team of eleven, will carry out extensive active-source seismic experiments at site TIME 2 (T2). Seismic recording systems will include 980 passive seismic nodes, two 24-channel Geode seismic systems, and one distributed acoustic sensing (DAS) recording system. Sources will include drilled explosives in a line layout and surface explosives in a grid layout. Researchers will establish safe travel routes by GPR (ground penetrating radar), then will perform RTK (real-time kinematic) GPS survey and stake-out of drilling, blasting, and seismic node locations. They will drill shot holes with a hot water drill, then have a blaster load holes with explosives to generate the seismic source. Passive seismic nodes will be deployed in shallow surface holes.
Deploying Team Members