RAPID: High-Resolution Gravity for Thwaites Glacier

RAPID：思韦茨冰川的高分辨率重力

• 批准号: 1842064
• 负责人: Kirsteen Tinto
• 金额: $ 10.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-15 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1842064&HistoricalAwards=false
• 关键词: RAPID; Resolution; Gravity; Thwaites; Glacier

Considerable uncertainty remains in projections of future ice loss from West Antarctica. A recent decadal style U.S. National Academy of Sciences, Engineering, and Medicine report entitled: A Strategic Vision for NSF Investments in Antarctic and Southern Ocean Research (2015) identifies changing ice in Antarctica as one of the highest priority science problems facing communities around the globe. The report identifies Thwaites Glacier as a target for collaborative intense research efforts in the coming years. This project contributes to that effort by deploying an instrument on board airborne surveys that will help to constrain the unknown terrains beneath the Thwaites Ice Shelf and in the region of the grounding line where the inland ice goes afloat. By improving the accuracy and resolution of these data, which are fed into predictive numerical models, the team will help to constrain the magnitude and rate of increase in the contribution of ice from Thwaites Glacier to the global ocean.The team will enhance the capabilities of the already planned British Antarctic Survey aerogeophysics survey of Thwaites Glacier during the 2018/19 field season. Their Inertial Measurement Unit will be paired with a state-of-the-art commercial gravity meter to acquire high-quality and significantly enhanced resolution data both over the ice shelf and at the grounding line. Data will be processed immediately following collection and raw and observed data will be released six months after collection.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.

对未来南极洲西部冰量减少的预测仍存在相当大的不确定性。美国国家科学、工程和医学院最近发表了一份题为《美国国家科学基金会在南极和南大洋研究中投资的战略愿景》（2015年）的十年期报告，将南极洲冰的变化确定为地球仪社区面临的最优先科学问题之一。该报告将Thwaites冰川确定为未来几年合作密集研究的目标。该项目通过在航空勘测上部署一个仪器来促进这一努力，这将有助于限制斯韦茨冰架下和内陆冰漂浮的接地线区域的未知地形。 通过提高这些数据的准确性和分辨率，这些数据将被输入预测性数值模型，该团队将有助于限制斯韦茨冰川对全球海洋的冰贡献的幅度和增长率。该团队将加强已经计划的英国南极调查局航空地球物理调查的能力，该调查将在2018/19实地调查季节进行。 他们的惯性测量装置将与最先进的商业重力仪配对，以获取冰架和接地线上的高质量和显著增强的分辨率数据。数据将在收集后立即处理，原始数据和观察数据将在收集后六个月发布。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Seafloor Depth of George VI Sound, Antarctic Peninsula, From Inversion of Aerogravity Data

根据航空重力数据反演得出的南极半岛乔治六世海峡海底深度

• DOI: 10.1029/2020gl088654
• 发表时间: 2020
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Constantino, Renata R.;Tinto, Kirsty J.;Bell, Robin E.;Porter, David F.;Jordan, Tom A.
• 通讯作者: Jordan, Tom A.

New gravity-derived bathymetry for the Thwaites, Crosson, and Dotson ice shelves revealing two ice shelf populations

• DOI: 10.5194/tc-14-2869-2020
• 发表时间: 2020-09-09
• 期刊: CRYOSPHERE
• 影响因子: 5.2
• 作者: Jordan, Tom A.;Porter, David;Paden, John D.
• 通讯作者: Paden, John D.