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ICECAP Basal Interface Specularity Content Profiles: IPY and OIB Data DOI: https://doi.org/10.15784/601371 Cite as Young, D. A., Blankenship, D. D., Greenbaum, J., Roberts, J., Schroeder, D., Siegert, M., & van Ommen, T. (2020) "ICECAP Basal Interface Specularity Content Profiles: IPY and OIB" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601371. AMD - DIF Record(s) NSIDC-0334_1 USAP-1543452_1 Abstract The International Collaborative Exploration of the Cryosphere though Airborne Profiling (ICECAP) collected five seasons of aerogeophysical data data through the NSFs International Polar Year and NASAs Operation Ice Bridge programs in East Antarctica, using the coherent HiCARS 60 MHz radar system. By comparing echo strengths for different focusing apertures, and accounting for the ranges and angles involved, we can derive the "specularity content" of the bed echo, a proxy for small scale bed roughness and a good indicator for subglacial water pressure in regions of distributed subglacial water (Schroeder et al., 2014, IEEE GRSL, 10.1109/LGRS.2014.2337878; IEEE; Dow et al., 2019, EPSL https://doi.org/10.1016/j.epsl.2019.115961). Specularity data are inherently noisy, so these products have been smoothed with a 1 km filter. Creator(s): Young, Duncan A.; Blankenship, Donald D.; Roberts, Jason; Siegert, Martin; van Ommen, Tas; Greenbaum, Jamin; Schroeder, Dustin Date Created: 2020-08-24 Repository: USAP-DC (current) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: 80, East: 170, South: -80, North: -65 Temporal Extent(s) Start: 2008-12-15 - End: 2012-12-20 Award(s) NSF 0636724 NSF 0733025 NSF 1443690 NSF 1543452 Version: 1 Related Project(s) Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System East Antarctic Grounding Line Experiment (EAGLE) IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP) Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP) References Young, D. A., Schroeder, D. M., Blankenship, D. D., Kempf, S. D., and Quartini, E.,2016, The distribution of basal water between Antarctic subglacial lakes from radar sounding, Philosophical Transactions Of The Royal Society A, 374, 20140297, 1-21. (doi:10.1098/rsta.2014.0297) Schroeder, D. M., Blankenship, D. D., Raney, R. K., and Grima, C.,2015, Estimating subglacial water geometry using radar bed echo specularity: application to Thwaites Glacier, West Antarctica, IEEE Geoscience And Remote Sensing Letters, 12, 3, 443-447 (doi:10.1109/LGRS.2014.2337878) Dow, C. F., McCormack, F. S., Young, D. A., Greenbaum, J. S., Roberts, J. L., and Blankenship, D. D.,2019, Totten Glacier subglacial hydrology determined from geophysics and modeling, Earth And Planetary Science Letters (doi:10.1016/j.epsl.2019.115961) Keywords Antarctica East Antarctica Ice Penetrating Radar ICECAP Radar Echo Sounder Radar Echo Sounding Subglacial Hydrology