USAP-DC

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WAIS grounding-zone migrations in Eastern Basin, Ross Sea and the LGM dilemma: New strategies to resolve the style and timing of outer continental shelf grounding events Description/Abstract This project determines the recent history of the West Antarctic Ice Sheet (WAIS) through a multidisciplinary study of the seabed in the Ross Sea of Antarctica. WAIS is perhaps the world's most critical ice sheet to sea level rise dut to near-future global warming. its history has been a key focus for the past decade, but there are significant questions as to whether WAIS was stable during the last glacial maximum--about 20,000 years ago--or undergoing advance and retreat. This project studies grounding zone translantions in Eastern Basin to constrain WAIS movements using a multidisciplinary approach that integrates multibeam bathymetry, seismic stratigraphy, sedimentology, diatom biostratigraphy, radiocarbon dating, 10Be concentration analyses, and numerical modeling. The broader impacts include improving society's understanding of sea level rise linked to global warming; postdoctoral, graduate, and undergraduate education; and expanding the participation of groups underrepresented in Earth sciences through links with LSU's Geoscience Alliance to Encourage Minority Participation. Personnel Person Role Bart, Philip Investigator Tomkin, Jonathan Co-Investigator Funding Antarctic Earth Sciences Award # 0538475 AMD - DIF Record(s) Bart-OPPGeol-0538475 NSF-ANT05-38475 Deployment Deployment Type NBP0803 ship expedition Data Management Plan None in the Database Product Level: Not provided Datasets Repository Title (link) Format(s) Status R2R NBP0802 data None exist R2R NBP0803 data None exist AMGRF NBP0802 and NBP0803 Sediment samples (full data link not provided) None bad_url Keywords CENOZOIC Ice Sheet Last Glacial Maximum PHANEROZOIC QUATERNARY Ross Sea Seismic Stratigraphy Platforms and Instruments CTD GPS GRAVIMETERS MBES MSBS R/V NBP SEISMIC REFLECTION PROFILERS WATERGUNS