Collaborative Research: Modeling Giant Icebergs and Their Decay

合作研究：模拟巨型冰山及其腐烂

• 批准号: 1744835
• 负责人: Till Wagner
• 金额: $ 28.95万
• 依托单位: University of North Carolina at Wilmington
• 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: 2018-07-01 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1744835&HistoricalAwards=false
• 关键词: Collaborative; Research; Modeling; Giant; Icebergs

Icebergs are a component of the Antarctic climate system, yet a comprehensive representation of their dynamics in climate models has remained elusive. Representing the role of icebergs in global climate models (GCMs) poses a formidable challenge to the scientific community. The most striking shortcoming of current iceberg models is arguably that they do not represent giant tabular icebergs, even though giant icebergs carry most of the freshwater stored in icebergs in the Southern Ocean. This lack of large icebergs in models is mostly due to the difficulties associated with adequately modeling iceberg decay. In particular, fracturing and breakup are not typically considered in iceberg models, despite being dominant iceberg decay processes. Investigators are to address these issues using a hierarchy of iceberg models, ranging from an idealized analytical model to a comprehensive GCM, in concert with recent observational data. The main objective of this study is to develop a new iceberg model that:(i) accounts for iceberg breakup and fracturing processes that have been neglected to date,(ii) improves on the representation of iceberg decay processes that were considered in previous models,(iii) explicitly represents large tabular icebergs.The primary broader impact of the proposed work will be through a K-12 teacher workshop series showcasing this project as an example of how scientists develop physical models. Ongoing changes in the California K-12 science standards will enable the teachers to creatively use this material in their classrooms.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.

冰山是南极气候系统的组成部分，但气候模型中冰山动态的全面表征仍然难以捉摸。代表冰山在全球气候模型（GCM）中的作用对科学界提出了巨大的挑战。当前冰山模型最显着的缺点可以说是它们不能代表巨大的板状冰山，尽管巨大的冰山携带着南大洋冰山中储存的大部分淡水。模型中缺乏大型冰山主要是由于对冰山腐烂进行充分建模存在困难。特别是，尽管压裂和破裂是冰山腐烂过程的主要过程，但在冰山模型中通常不考虑破裂和破裂。研究人员将使用一系列冰山模型来解决这些问题，从理想化的分析模型到综合的 GCM，并结合最近的观测数据。本研究的主要目标是开发一种新的冰山模型，该模型：（i）解释迄今为止被忽视的冰山破裂和断裂过程，（ii）改进以前模型中考虑的冰山腐烂过程的表示， (iii) 明确代表大型平板冰山。拟议工作的主要更广泛影响将通过 K-12 教师研讨会系列展示该项目，作为科学家如何开发物理模型的示例。加州 K-12 科学标准的不断变化将使教师能够在课堂上创造性地使用这些材料。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力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

Large spatial variations in the flux balance along the front of a Greenland tidewater glacier

格陵兰潮水冰川前部通量平衡的巨大空间变化

• DOI: 10.5194/tc-13-911-2019
• 发表时间: 2019-01
• 期刊: The Cryosphere
• 作者: Wagner, Till J.;Straneo, Fiamma;Richards, Clark G.;Slater, Donald A.;Stevens, Laura A.;Das, Sarah B.;Singh, Hanumant
• 通讯作者: Singh, Hanumant

Tropical climate responses to projected Arctic and Antarctic sea-ice loss

热带气候对预计的北极和南极海冰消失的反应

• DOI: 10.1038/s41561-020-0546-9
• 发表时间: 2020-03-16
• 期刊: Nature Geoscience
• 影响因子: 18.3
• 作者: M. Engl;L. Polvani;Lantao Sun;C. Deser
• 通讯作者: C. Deser

Localized Plumes Drive Front‐Wide Ocean Melting of A Greenlandic Tidewater Glacier

局部羽流驱动格陵兰潮水冰川的大洋融化

• DOI: 10.1029/2018gl080763
• 发表时间: 2018-11
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Slater, D. A.;Straneo, F.;Das, S. B.;Richards, C. G.;Wagner, T. J. W.;Nienow, P. W.
• 通讯作者: Nienow, P. W.

Are Multi‐Decadal Fluctuations in Arctic and Antarctic Surface Temperatures a Forced Response to Anthropogenic Emissions or Part of Internal Climate Variability?

北极和南极表面温度的数十年波动是对人为排放的被迫反应还是内部气候变化的一部分？

• DOI: 10.1029/2020gl090631
• 发表时间: 2021-03-28
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: M. Engl

The Influence of Meltwater on Phytoplankton Blooms Near the Sea‐Ice Edge

融水对海洋附近浮游植物繁殖的影响——冰缘

• DOI: 10.1029/2020gl091758
• 发表时间: 2021-01
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Lester, C. W.;Wagner, T. J.;McNamara, Dylan E.;Cape, M. R.
• 通讯作者: Cape, M. R.