EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate

EAGER：L 波段雷达冰探深仪，用于测量冰底条件和冰架融化速率

• 批准号: 1921418
• 负责人: Stephen Yan
• 金额: $ 29.87万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-06-01 至 2021-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1921418&HistoricalAwards=false
• 关键词: EAGER; Band; Radar; Ice; Sounder

Predicting the response of ice sheets to changing climate and their contribution to sea level requires accurate representation in numerical models of basal conditions under the ice. There remain large data gaps for these basal boundary conditions under the East Antarctic Ice Sheet as well as in West Antarctica, including basal melt rates under ice shelves. This project will develop and test a prototype ground-based radar system to sound and image ice more than 4km thick, detect thin water films at the ice bed, and determine basal melt rates under ice shelves. The team will work with European partners (France, Italy, Germany) at Dome C to conduct deep-field Antarctic testing of the new radar. The project will build and test an L-band radar system (1.2-1.4GHz) with peak transmit power of 2kW. In addition to sounding and imaging thick ice, detection goals include resolving thin water films (0.5mm). Such a system would target glaciological problems including site selection for ice in the 1.5-million-year age range, basal stress boundary conditions under grounded ice, and melt rates under floating shelves. By demonstrating feasibility, the project aims to influence sensor selection for satellite missions.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.

预测冰盖对变化气候的响应及其对海平面的贡献需要在冰下基础条件的数值模型中准确表示。这些基础边界条件在南极冰盖和南极西部的基础边界条件下仍然存在很大的数据差距，包括冰架下的基础熔体速率。 该项目将开发和测试原型地面雷达系统，以声音和图像冰厚度超过4公里，检测冰床的薄水膜，并确定冰架下的基础熔体速率。 该团队将与圆顶C的欧洲合作伙伴（法国，意大利，德国）合作，对新雷达进行深田南极测试。 该项目将建立和测试L频段雷达系统（1.2-1.4GHz），峰值发射功率为2kW。 除了发声和成像厚的冰外，检测目标还包括解决薄水膜（0.5mm）。 这样的系统将针对冰川学问题，包括在150万年龄范围内冰的现场选择，地面冰下的基础应力边界条件以及浮动架子下的熔体速率。 通过证明可行性，该项目旨在影响卫星任务的传感器选择。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响评估标准，被认为值得通过评估来获得支持。

项目成果

L-Band Radar Sounder for Measuing Ice Basal Conditions and Ice-Shelf Melt Rate

用于测量冰底条件和冰架融化速率的 L 波段雷达探测器

• DOI: 10.1109/igarss.2018.8518210
• 发表时间: 2018
• 期刊: IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium
• 作者: Yan, Jie-Bang;Gogineni, Prasad;O'Neill, Charles
• 通讯作者: O'Neill, Charles