EAPSI: Parameterizing the Two Phase Nature of Platelet Ice for use in Numerical Models that Simulate Sea Ice, Ice Shelves, and Icy Moons

EAPSI：参数化片状冰的两相性质，用于模拟海冰、冰架和冰卫星的数值模型

• 批准号: 1613925
• 负责人: jacob buffo
• 金额: $ 0.54万
• 依托单位: buffo jacob
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-15 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1613925&HistoricalAwards=false
• 关键词: EAPSI; Parameterizing; Two; Phase; Nature

The evolution of sea ice, ice shelves, and icy moons is crucial to understanding how polar regions affect Earth?s climate and ocean dynamics, and unraveling the evolution and potential habitability of icy moons. One difficulty in modeling these entities is the complex interface between the floating ice and the underlying ocean. Platelet ice is characterized by shards of ice forming below ice shelves that float up to this interface creating a slurry of both solid and liquid phases, necessitating complex physics to accurately describe its evolution. The field of platelet ice research is young, and while it is beginning to be incorporated into models of sea ice, no models of ice shelves or icy moons include the phenomenon. Dr. Natalie Robinson, a researcher for the National Institute of Water and Atmospheric Research in Wellington, is at the forefront of platelet ice research. This collaborative project will utilize Dr. Robinson?s extensive knowledge of platelet ice formation and properties to incorporate the physics of accumulating platelet ice into an existing multiphase model used to simulate ice shelves and icy moons; producing the first model that includes these dynamics.This project will modify an existing finite difference model used to simulate the two-phase nature of floating ice by incorporating the physics of mushy layer theory. The additional parameterization of the platelet ice formation and characteristics will strengthen this models ability to accurately simulate the basal processes of a variety of terrestrial and extraterrestrial environments. The main additions will be the propensity for platelet accretion to occur and the porosity of an accumulated platelet layer based on local ocean parameters. Collaboration with Dr. Robinson will allow for empirical observations of platelet layer characteristics to be quickly incorporated into a numerical model of ice-ocean interfaces that is primed for incorporation into climate, ocean, and icy moon systems models.This award under the East Asia and Pacific Summer Institutes program supports summer research by a U.S. graduate student and is jointly funded by NSF and the Royal Society of New Zealand.

海冰、冰架和冰卫星的演化对于理解极地地区如何影响地球-S气候和海洋动力学，以及揭开冰卫星的演化和潜在的宜居性是至关重要的。对这些实体进行建模的一个困难是浮冰和底层海洋之间的复杂界面。片状冰的特征是在冰架下方形成的冰片漂浮到这个界面上，形成了固体和液体的泥浆，需要复杂的物理学来准确地描述它的演化。碎屑冰的研究领域还很年轻，虽然它开始被纳入海冰的模型中，但还没有冰架或冰卫星的模型包括这一现象。位于惠灵顿的国家水与大气研究所的研究员娜塔莉·罗宾逊博士走在了血小板冰研究的前沿。这个合作项目将利用罗宾逊？S博士对冰片形成和性质的广泛知识，将积聚冰片的物理学融入到现有的用于模拟冰架和冰冷卫星的多相模型中；产生第一个包括这些动力学的模型。该项目将通过纳入糊状层理论的物理学来修改现有的用于模拟浮动冰的两相性质的有限差分模型。对小片冰的形成和特征的额外参数化将加强该模型准确模拟各种陆地和地外环境的基本过程的能力。主要增加的将是发生血小板聚集的倾向，以及基于当地海洋参数积累的血小板层的孔隙度。与罗宾逊博士的合作将使对血小板层特征的经验观察能够迅速纳入冰-海洋界面的数值模型，该模型将被纳入气候、海洋和冰冷的月球系统模型。该奖项由东亚和太平洋夏季研究所项目资助一名美国研究生的夏季研究，由NSF和新西兰皇家学会联合资助。