RAPID: International Collaborative Airborne Sensor Deployments near Antarctic Ice Shelves

RAPID：在南极冰架附近部署国际协作机载传感器

• 批准号: 2114454
• 负责人: Jamin Greenbaum
• 金额: $ 19.99万
• 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: 2021
• 资助国家: 美国
• 起止时间: 2021-06-15 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2114454&HistoricalAwards=false
• 关键词: RAPID; International; Collaborative; Airborne; Sensor

The ice shelves around the perimeter Antarctica hold back inland ice that has the potential to raise global sea level by meters. By how much and how rapidly this could occur is a central question in glaciology. The underside of these ice shelves is in contact with the ocean, and there are signs that warming of ocean water is causing melting and retreat of these shelves, with direct implications for sea-level rise. This project will seize an emergent opportunity to work with Australian and South Korean colleagues to acquire snapshot profiles of ocean temperature, salinity, and velocity, and improve bathymetric knowledge, where no prior data exist. The team will work near three glaciers draining ice with substantial sea-level potential from the East and West Antarctic Ice Sheets. The targets are Shackleton and Cook Ice Shelves in East Antarctica, and Thwaites Glacier in West Antarctica. An undergraduate student will be engaged through the Scripps Undergraduate Research Fellowship program and the team will work through the Scripps Educational Alliances program to identify educational outreach opportunities through which to build community engagement in this project.The team will use high-resolution general circulation model simulations to optimize sensor targeting (to be deployed from helicopter and fixed-wing aircraft) and evaluate the relative roles of subglacial freshwater discharge and ocean forcing on subglacial melt rates. The aim is to better understand why grounding-line melt rates are higher at the East Antarctic sites despite data indicating warmer ambient ocean temperatures at the West Antarctic sites. Such behavior could be explained by discharge of subglacial freshwater into ice-shelf cavities, but insufficient data currently exist to test this hypothesis. The team aims to build on ongoing international, collaborative airborne oceanographic sampling with colleagues in the Republic of Korea, Australia, and the United States.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.

南极周围的冰架子阻塞了内陆冰，该冰有可能通过米数提高全球海平面。 这是冰川学中的核心问题，这是一个核心问题。 这些冰架的底面与海洋接触，并且有迹象表明，海水的变暖正在引起这些货架的融化和撤退，这对海平面上升的上升直接影响。 该项目将抓住与澳大利亚和韩国同事合作的新兴机会，以获取海洋温度，盐度和速度的快照概况，并改善不存在先前数据的测深知识。 该团队将在三个冰川附近工作，从而从东部和西方的冰盖上散发出巨大的海平面潜力。 目标是南极洲东部的沙克尔顿和烹饪冰架，以及南极西部的Thwaites冰川。 一名本科生将通过Scripps本科研究奖学金计划订婚，团队将通过Scripps教育联盟计划进行努力，以确定在该项目中建立社区参与的教育外展机会，团队将使用高分辨率的一般循环模型模型模型，以优化传感器，并在固定派对范围内采用型型式驱动器，以相对启用型式启用），以实现型式启用），以实现螺旋式启动），以实现螺旋式启用）。在冰山下熔体速率上。 目的是更好地理解为什么在南极的东部熔点较高，尽管数据表明在南极西部地区的环境较高的海洋温度升高。 可以通过将冰川下淡水排放到冰壳腔中来解释这种行为，但是目前存在的数据不足以检验该假设。 该小组的目标是建立与韩国，澳大利亚共和国和美国的同事进行持续的国际合作空降海洋学抽样。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的审查标准通过评估来进行评估的。

项目成果

Antarctic Bedmap data: Findable, Accessible, Interoperable, and Reusable (FAIR) sharing of 60 years of ice bed, surface, and thickness data

• DOI: 10.5194/essd-15-2695-2023
• 发表时间: 2023-07-17
• 期刊: EARTH SYSTEM SCIENCE DATA
• 影响因子: 11.4
• 作者: Fremand, Alice C.;Fretwell, Peter;Zirizzotti, Achille
• 通讯作者: Zirizzotti, Achille

Glaciological history and structural evolution of the Shackleton Ice Shelf system, East Antarctica, over the past 60 years

• DOI: 10.5194/tc-17-157-2023
• 发表时间: 2023-01
• 期刊: The Cryosphere
• 作者: S. Thompson;B. Kulessa;A. Luckman;J. Halpin;J. Greenbaum;T. Pelle;F. Habbal;Jingxue Guo;Lenneke M. Jong;J. L. Roberts;Bo Sun;D. Blankenship

Bathymetry Beneath the Amery Ice Shelf, East Antarctica, Revealed by Airborne Gravity

• DOI: 10.1029/2021gl096215
• 发表时间: 2021-12
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Junjun Yang;Jingxue Guo;J. Greenbaum;X. Cui;L. Tu;Lin Li;Lenneke M. Jong;Xueyuan Tang

Antarctic Slope Current Modulates Ocean Heat Intrusions Towards Totten Glacier

• DOI: 10.1029/2021gl094149
• 发表时间: 2021-08
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Y. Nakayama;C. Greene;F. Paolo;Vigan Mensah;Hong Zhang;Haruhiko Kashiwase;D. Simizu;J. Greenbaum;D. Blankenship;A. Abe‐Ouchi;S. Aoki

A newly discovered subglacial lake in East Antarctica likely hosts a valuable sedimentary record of ice and climate change

东南极洲新发现的冰下湖可能蕴藏着有关冰和气候变化的宝贵沉积记录

• DOI: 10.1130/g50009.1
• 发表时间: 2022-05
• 期刊: Geology
• 影响因子: 5.8
• 作者: Shuai Yan;Donald D. Blankenship;Jamin S. Greenbaum;Duncan A. Young;Lin Li;Anja Rutishauser;Jingxue Guo;Jason L. Roberts;Tas D. van Ommen;Martin J. Siegert;Bo Sun
• 通讯作者: Bo Sun