RAPID: International Collaborative Research into Ice-ocean Iteractions & Fractures at Thwaites (ICE-RIFT)

RAPID：冰海迭代的国际合作研究

• 批准号: 2309648
• 负责人: Jamin Greenbaum
• 金额: $ 20万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309648&HistoricalAwards=false
• 关键词: RAPID; International; Collaborative; Research; into; RAPID; International; Collaborative; Research; into

Multiple independent satellite remote sensing datasets indicate that the Amundsen Sea Embayment (ASE) sector of the West Antarctic Ice Sheet (WAIS) is losing mass faster than anywhere else in Antarctica. Thwaites Glacier, which drains over a half a meter of global sea level potential from its catchment alone, is one of the fastest retreating glaciers in the ASE. Although the ocean is generally understood to drive rapid melting of glaciers in the ASE, the ocean state and sea floor shape near most of the largest glaciers remains sparsely sampled. These unknowns challenge efforts to validate coupled numerical ocean and ice sheet models needed to predict future ice melt and sea level rise. This project will acquire key new profiles of ocean temperature, salinity, and depth near the Thwaites Glacier Tongue (TGT) from airborne platforms.Data collected during previous collaborations with the Korea Polar Research Institute (KOPRI) indicate higher concentrations of glacial meltwater and warmer temperatures in the upper 300 meters of the water column near Thwaites Glacier. Motivated by these results, this project will continue these helicopter-based oceanographic measurements from the RV Araon icebreaker in 2023/24 to obtain water column profiles near Thwaites’ grounding line. These new ocean state data will enable the team to confirm their previous results, determine the amount of interannual variability in this region, and evaluate ocean conditions in a wider area near the TCT. Additionally, movement of ice in the two years between observations will enable new seafloor depth observations from Airborne Expendable Conductivity Temperature and Depth (AXCTD) sensors, adding to a growing database of constraints useful for improving gravity-derived bathymetry models. Through this deepened collaboration with KOPRI, the project will demonstrate refined procedures and test new capabilities for helicopter-based airborne oceanography in Antarctica. The PI will partner with the UC San Diego Birch Aquarium in the creation of new polar exhibits designed to offer new types of immersive and interactive experiences that capture active expeditions aboard research vessels and at polar field stations.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

多个独立的卫星遥感数据集表明，南极冰盖（WAIS）的Amundsen Sea Embayment（ASE）部门比南极的其他任何地方都丢失质量。 Thwaites冰川仅从其集水区中排出超过半米的全球海平面潜力，是ASE中最快的撤退冰川之一。尽管通常认为海洋可以驱动ASE中的冰川快速熔化，但大多数最大冰川附近的海洋状态和海底形状仍然很稀少。这些未知数挑战了验证验证耦合的数值海洋和冰盖模型，以预测未来的冰融化和海平面上升。该项目将从机载平台Thwaites冰川舌（TGT）附近的海洋温度，盐度和深度的关键新概况中获取。Data在先前与韩国极地研究所（KOPRI）的合作中收集了较高浓度的冰川融化材料融合水和300米的温度较高的水柱附近的水柱胶lakiers glacier。受这些结果的促进，该项目将继续从2023/24的RV Araon Icebreaker那里继续这些基于直升机的海洋学测量值，以获取Thwaites接地线附近的水柱轮廓。这些新的海洋国家数据将使团队能够确认其先前的结果，确定该地区的年际变化量，并评估TCT附近广泛区域的海洋状况。此外，在观测之间的两年中，冰的运动将使空气中的可消耗性电导率温度和深度（AXCTD）传感器的新海底深度观察能够增加，从而增加了不断增长的约束数据库，可用于改善重力衍生的浴模模型。通过与Kopri的加深合作，该项目将展示精致的程序，并测试南极洲基于直升机的机载海洋学的新功能。 PI将与圣地亚哥分校的桦木水族馆合作，创建新的极地展览，旨在提供新型的身份互动和互动体验，可在研究船上和极地实地站捕获积极的探险。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识优点和广泛的crietia criteria crigitia criperia的评估来通过评估来进行的。