USAP-DC

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Sub-ice-shelf seafloor elevation derived from point-source active-seismic data on Thwaites Eastern Ice Shelf and Dotson Ice Shelf, December 2019 and January 2020 Data DOI: https://doi.org/10.15784/601827 Cite as Muto, A. (2024) "Sub-ice-shelf seafloor elevation derived from point-source active-seismic data on Thwaites Eastern Ice Shelf and Dotson Ice Shelf, December 2019 and January 2020" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601827. Abstract This is a dataset of elevations of sub-ice-shelf seafloor and ice-shelf bottom derived from active-source-seismic sounding conducted at discrete points distributed over the Thwaites Eastern Ice Shelf (TEIS) and Dotson Ice Shelf (DIS). Also included are the ice-shelf surface elevation at each seismic-shot location derived from the concurrent GNSS recording and P-wave speed profile through firn derived from shallow refraction-seismic surveys on each ice shelf. Raw seismic records are also provided as SEGY files. Creator(s): Muto, Atsuhiro Date Created: 2024-08-23 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -112.31, East: -105.36, South: -75.1, North: -74.8 Temporal Extent(s) Start: 2019-12-22 - End: 2020-01-16 Award(s) NSF 1929991 Version: 1 Related Project(s) NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment References Diez, A., O. Eisen, C. Hofstede, P. Bohleber and U. Polom (2013). Joint interpretation of explosive and vibroseismic surveys on cold firn for the investigation of ice properties. Annals of Glaciology, 54(64), 201–210 (doi:10.3189/2013AoG64A200) Kirchner, J.F. and C.R. Bentley (1990). RIGGS III: seismic short-refration studies using an analytical curve-fitting technique. The Ross Ice Shelf: Glaciology and Geophysics., American Geophysical Union, Washington, DC, 42(5), 109–126 (doi:10.1029/AR042p0109) McDougall, T.J. and P.M. Barker (2011) Getting started with TEOS-10 and the Gibbs Seawater (GSW) Oceanographic Toolbox, 28pp., SCOR/IAPSO WG127, ISBN 978-0-646-55621-5 Nøst, O.A. (2004). Measurements of ice thickness and seabed topography under the Fimbul Ice Shelf, Dronning Maud Land, Antarctica. Journal of Geophysical Research, 109, 1–14 (doi:10.1029/2004JC002277) Muto, A., A. Roccaro, K. Alley, E. Pettit, C. Wild, T. Scambos, B. Wallin, M. Truffer, D. Pomraning, A. Wåhlin, K.J. Heywood and the ITGC TARSAN Team. Active-source seismic soundings of seafloor depth beneath Thwaites and Dotson Ice Shelves, West Antarctica, in preparation for submission to Earth System Science Data Keywords Antarctica Cryosphere Dotson Ice Shelf Thwaites Glacier