USAP-DC

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Ground Penetrating Radar Grid Survey of the McMurdo Shear Zone Data DOI: https://doi.org/10.15784/601102 Cite as Ray, L., Arcone, S., Kaluzienski, L., Koons, P., Lever, J., & Walker, B. (2018) "Ground Penetrating Radar Grid Survey of the McMurdo Shear Zone" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601102. AMD - DIF Record(s) USAP-1245915_1 Abstract This dataset is comprised of ground penetrating radar data (GSSI DZT format with DZG files for GPS location) of a 28 square km area conduced in the heavily crevassed McMurdo Shear Zone in two consecutive field seasons. A radar system comprised of a GSSI SIR-30 32-bit two-channel control unit and model 5103 “400 MHz” and Model 5106A “200 MHz” antenna units were used to conduct the GPR surveys. The radar system was mounted on a sled and towed by a robot. The robot surveyed the 5 x 5.7 km area on lines separated by 50-m and traveled from West to East and return. The 2014 survey was conducted between Oct 29, 2014 and Nov 9, 2014, and the 2015 survey was conducted between Oct 26, 2015 and Nov 1, 2015. The use of identical waypoints in each year provides an Eulerian sampling protocol, where sampled GPS locations remain fixed, but the ice moves between annual surveys. In 2014, the 400 MHz antenna imaged to a depth of 19 meters, and in 2015, the 400 MHz antenna imaged to a depth of 80 meters to examine englacial ice. In both years, the 200 MHz antenna imaged to a depth of 160 meters. Creator(s): Ray, Laura; Arcone, Steven; Kaluzienski, Lynn; Koons, Peter; Lever, Jim; Walker, Ben Date Created: 2018-06-07 Repository: USAP-DC (current) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: 168.36, East: 168.6, South: -78.08, North: -78.03 Temporal Extent(s) Start: 2014-10-29 - End: 2015-11-01 Award(s) NSF 1245915 Version: 1 Related Project(s) Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone References Steven A. Arcone, James H. Lever, Laura E. Ray, Benjamin S. Walker, Gordon Hamilton, and Lynn Kaluzienski (2016). Ground-penetrating radar profiles of the McMurdo Shear Zone, Antarctica, acquired with an unmanned rover: Interpretation of crevasses, fractures, and folds within firn and marine ice. GEOPHYSICS 2016 81:1, WA21-WA34. (doi:10.1190/geo2015-0132.1) Keywords Antarctica Firn Folds Geology/Geophysics - Other Glaciers/ice Sheet Glaciology GPR Snow/ice