USAP-DC

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IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP) Short Title: ICECAP/IPY Start Date: 2008-09-15 End Date: 2013-08-31 Description/Abstract This project is an aerogeophysical survey to explore unknown terrain in East Antarctica to answer questions of climate change and earth science. The methods include ice-penetrating radar, gravity, and magnetic measurements. The project?s main goal is to investigate the stability and migration of ice divides that guide flow of the East Antarctic ice sheet, the world?s largest. The project also maps ice accumulation over the last interglacial, identifies subglacial lakes, and characterizes the catchment basins of the very largest glacial basins, including Wilkes and Aurora. The outcomes contribute to ice sheet models relevant to understanding sea level rise in a warming world. The work will also help understand the regional geology. Buried beneath miles-thick ice, East Antarctica is virtually uncharacterized, but is considered a keystone for tectonic reconstructions and other geologic questions. The region also hosts subglacial lakes, whose geologic histories are unknown. The broader impacts are extensive, and include societal relevance for understanding sea level rise, outreach in various forms, and education at the K12 through postdoctoral levels. The project contributes to the International Polar Year (2007-2009) by addressing key IPY themes on frontiers in polar exploration and climate change. It also includes extensive international collaboration with the United Kingdom, Australia, France and other nations; and offers explicit opportunities for early career scientists. Personnel Person Role Siegert, Martin Co-Investigator Roberts, Jason Co-Investigator Van Ommen, Tas Co-Investigator Warner, Roland Co-Investigator Richter, Thomas Co-Investigator Greenbaum, Jamin Co-Investigator Holt, John W. Co-Investigator Young, Duncan A. Co-Investigator Blankenship, Donald D. Investigator Funding Antarctic Earth Sciences Award # 0733025 Antarctic Integrated System Science Award # 0733025 AMD - DIF Record(s) blankenship_0733025 USAP-0733025_1 Data Management Plan None in the Database Product Level: 1 (processed data) Datasets Repository Title (link) Format(s) Status USAP-DC ICECAP Basal Interface Specularity Content Profiles: IPY and OIB PDF exists NSIDC ICECAP radargrams (HiCARS 1) None exist NSIDC ICECAP radargrams (HiCARS 2) None exists NSIDC Ice thickness and bed reflectivity data (HiCARS 1) None exists NSIDC Ice thickness and bed reflectivity data (HiCARS 2) None exists NSIDC Magnetic raw data None exists NSIDC Magnetic anomaly data None exists NSIDC Gravity raw data None exists NSIDC Gravity anomaly data None exists NSIDC Laser altimetry raw data None exists NSIDC Laser surface elevation data None exists NSIDC ICECAP flight reports None exists USAP-DC Ice-penetrating radar internal stratigraphy over Dome C and the wider East Antarctic Plateau ASCII exists USAP-DC ICECAP ice thickness data over the Darwin and Hatherton Glaciers, Transantarctic Mountains, Antarctica ASCII exists Publications Dow, C. F., Lee, W. S., Greenbaum, J. S., Greene, C. A., Blankenship, D. D., Poinar, K., Forrest, A. L., Young, D. A., and Zapp, C. J.,2018, Basal channels drive active surface hydrology and transverse ice shelf fracture, Science Advances, 4, 6, 10.1126/sciadv.aao7212 (doi:10.1126/sciadv.aao7212) Wright, A. P., Young, D. A., Roberts, J. L., Schroeder, D. M., Bamber, J. L., Dowdeswell, J. A., … Siegert, M. J. (2012). Evidence of a hydrological connection between the ice divide and ice sheet margin in the Aurora Subglacial Basin, East Antarctica. Journal of Geophysical Research: Earth Surface, 117(F1), n/a–n/a. (doi:10.1029/2011jf002066) Aitken, A. R. A., Young, D. A., Ferraccioli, F., Betts, P. G., Greenbaum, J. S., Richter, T. G., … Siegert, M. J. (2014). The subglacial geology of Wilkes Land, East Antarctica. Geophysical Research Letters, 41(7), 2390–2400. (doi:10.1002/2014gl059405) Aitken, A. R. A., Betts, P. G., Young, D. A., Blankenship, D. D., Roberts, J. L., & Siegert, M. J. (2016). The Australo-Antarctic Columbia to Gondwana transition. Gondwana Research, 29(1), 136–152. (doi:10.1016/j.gr.2014.10.019) Roberts, J., Curran, M., Poynter, S., Moy, A., Ommen, T. van, Vance, T., … Siegert, M. (2017). Correlation confidence limits for unevenly sampled data. Computers & Geosciences, 104, 120–124. (doi:10.1016/j.cageo.2016.09.011) Liu-Schiaffini, M., Ng, G., Grima, C., & Young, D. (2022). Ice Thickness from Deep Learning and Conditional Random Fields: Application to Ice Penetrating Radar Data with Radiometric Validation. IEEE Transactions on Geoscience and Remote Sensing, 1–1. (doi:10.1109/tgrs.2022.3214147) Keywords Aurora Subglacial Basin Byrd Glacier DOME C East Antarctica ICE SHEETS Totten Glacier Wilkes Land Wilkes Subglacial Basin Platforms and Instruments BT-67