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

该项目通过对南极洲罗斯海海底的多学科研究，确定了南极西部冰盖（WAIS）的近代史。由于不久的将来全球变暖，WAIS可能是世界上对海平面上升最关键的冰盖。在过去的十年里，它的历史一直是人们关注的焦点，但是在最后一次冰川高峰时期（大约2万年前），WAIS是否稳定，或者是否经历了前进和后退，这是一个重要的问题。本项目采用多学科方法，综合多波束测深、地震地层学、沉积学、硅藻生物地层学、放射性碳测年、10Be浓度分析和数值模拟，研究东部盆地的地面带平移，以限制WAIS的运动。更广泛的影响包括提高社会对与全球变暖有关的海平面上升的理解；博士后、研究生和本科教育；通过与路易斯安那州立大学的地球科学联盟建立联系，鼓励少数群体参与，扩大地球科学领域代表性不足的群体的参与。

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.