RAPID: US-Korean collaboration to build a Ross-Amundsen Ice Core Array (RAICA) along the West Antarctic coastline

RAPID：美韩合作沿南极西部海岸线建造罗斯-阿蒙森冰芯阵列（RAICA）

• 批准号: 2304836
• 负责人: Peter Neff
• 金额: $ 16.3万
• 依托单位: University of Minnesota-Twin Cities
• 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: 2023-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2304836&HistoricalAwards=false
• 关键词: RAPID; US; Korean; collaboration; build

The West Antarctic coastline is changing rapidly: it is thinning, losing mass, and buttressing ice shelves that are critical for future stability of the ice sheet are retreating. Despite observed change caused by ice-ocean-atmosphere interactions perturbed by both internal and forced climate processes (e.g., tropical Pacific Ocean variability, ozone depletion, greenhouse gas warming), there are few direct measurements along this coastline. Ice rises, which are regions of grounded ice within ice shelves, are ideal ice-core sites. Ice rises line this region, allowing for reconstruction of coastal climate and environmental parameters dating back decades to millennia at annual resolution. Retrieval of a 150-m-long ice core from an ice rise in this region will expand our understanding of critical processes relevant to observed coastal change over a timespan of several centuries. Shallower cores also collected on the ice rise, flanking the central 150-m core, will validate the amount and spatial variability of surface change across this ice rise, providing constraint for airborne observations, satellite observations, climate models, and reanalysis datasets. The project forms a new collaboration between a U.S. researcher and the South Korean Polar Research Institute (KOPRI), who will provide the bulk of the logistics, including the use of their research vessel, RV ARAON. The project will also train a graduate student.This RAPID proposal relies on KOPRI logistics to accomplish the field aspects of this project. The participants will deploy on the RV ARAON from December 2023 – February 2024. The U.S.-South Korean team will drill one to two 150-m ice core from the center of the peninsula, along the local ice divide. Further, to assess surface-mass-balance (SMB) variability, the team will drill a series of 10- to 15-m ice cores on the flanks of the ice divide. Martin Peninsula, between the Getz Ice Shelf and the Dotson Ice Shelf, has been chosen as the primary site based on existing airborne snow radar data, and the high snow accumulation rate, which preserves high-resolution paleoclimate information. The specific site will be chosen based on both scientific value and logistical constraints associated with the RV ARAON cruise. The ice-core data will be used to characterize climate variability, extremes, and trends along the coastal West Antarctic Ice Sheet — over recent decades and centuries.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.

南极海岸线正在迅速发生变化：它正在变薄，失去质量和枪托冰架，这对于冰盖的未来稳定性至关重要。尽管观察到由内部和强迫气候过程扰动的冰山 - 大气相互作用引起的变化（例如，热带太平洋变异性，臭氧耗竭，温室气体变暖），但在该海岸线上几乎没有直接测量。冰升是冰架上的冰块区域，是理想的冰核地点。 ICE上升了该地区，允许重建沿海气候和环境参数，该地区可以追溯到数十年来，以每年的分辨率回溯到数十年。从该地区的冰上增加150米长的冰芯将扩大我们对观察几个世纪以来沿海变化相关的关键过程的理解。在冰上升起的冰上还收集了较浅的核心，侧面是中央150米的核心，将验证整个冰层上升的表面变化的数量和空间变化，从而为机载观测值，卫星观测，气候模型和重新分析数据集提供了限制。该项目在美国研究人员和韩国极地研究所（KOPRI）之间建立了新的合作，他们将提供大部分物流，包括使用其研究船RV Araon。该项目还将培训一名研究生。该快速提案依靠Kopri物流来完成该项目的领域方面。参与者将从2023年12月至2024年2月在RV Araon上部署。美国南方韩国队将沿着当地的ICE Divide从半岛的中心钻一到两个150米的ICE核心。此外，为了评估表面质量平衡（SMB）的可变性，该团队将在冰层的侧面钻一系列10至15米的冰芯。 Getz Ice架和Dotson Ice Beshelf之间的Martin Peninsula被选为基于现有的空中雪雷达数据的主要地点，以及高分辨率的高分辨率古气候信息。将根据与RV Araon Cruise相关的科学价值和后勤约束来选择特定站点。冰核数据将用于表征沿海南极沿海地区冰盖沿线的登山者的变化，极端和趋势 - 近几十年来，这一奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响审查标准来评估的。