Development of a 3-D Sea Ice Model for Climate Applications

开发用于气候应用的 3D 海冰模型

• 批准号: 9614492
• 负责人: Judith Curry
• 金额: $ 32.33万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-01 至 2001-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614492&HistoricalAwards=false
• 关键词: Development; Sea; Ice; Model; Climate

The fundamental scientific question to be addressed by this research is: "How do different physical processes influence the response of sea ice to a heat flux perturbation?" A new 3-D sea ice model for climate applications will be developed. This research is motivated by large discrepancies between the response of the 1-D thermodynamic and 2-D dynamic/thermodynamia models (both widely used in climate simulations) to a surface heat flux perturbation such as would arise from a CO2doubling. Uncertainties regarding important physical processes occurring in sea ice still remain, and further observational data (and analyses of existing data) are required. However, there is a sufficient amount known about the individual physical processes and significant progress can be made in sea ice modeling by synthesizing state-of-the-art understanding of the different physical processes currently included in l-D and 2-D models into a 3-D dynamic/thermodynamic sea ice model. The success of a single-cell thermodynamic/dynamic sea ice model that was developed recently by the investigator's research group is very encouraging in this regard. Building upon previous and ongoing research activities, sea ice modeling for applications in climate models will be developed as follows; a) improve a single-cell thermodynamic/dynamic sea ice model and test it against field and satellite observations b) conduct sensitivity studies using the single-cell model to assess simplifications that can be made to improve computational efficiency c) incorporate the processes deemed necessary in the single-cell studies into a 3-D dynamic/thermodynamic sea ice model; d) assess if further simplifications of the 3-D model can be made to improve computational efficiency e) conduct basin-wide simulations to assess model performance be comparing with observations and to assess model sensitivity to heat flux and momentum perturbations. A product of this work will be a comprehensive, modular, well-documented, and publi clyavailable 3-D sea ice model that can serve as a tool for a variety of researchers involved in polar applications, and that could provide an improved sea ice component for regional and climate system models.

这项研究要解决的基本科学问题是：“不同的物理过程如何影响海冰对热通量扰动的反应？”将开发出一种新的3-D海冰模型，用于气候应用。这项研究是由1-D热力学和2-D动态/热力学模型的响应（在气候模拟中广泛使用）与表面热通量扰动的响应之间的巨大差异。 关于海冰中发生的重要物理过程的不确定性仍然存在，需要进一步的观察数据（以及现有数据的分析）。但是，对于单个物理过程，可以通过合成对L-D和2-D模型中当前包含的不同物理过程的最先进的理解为3-D动态/热力学海冰模型的最新理解，可以在海冰建模中取得很大的进步。研究人员的研究小组最近开发的单细胞热力学/动态海冰模型的成功在这方面非常令人鼓舞。在以前和正在进行的研究活动的基础上，将在气候模型中进行应用的海冰建模将如下开发； a）改善单细胞热力学/动态海冰模型，并针对现场和卫星观测来对其进行测试b）使用单细胞模型进行灵敏度研究，以评估可以提高计算效率的简化，以提高计算效率c）将在单细胞研究中所必需的过程纳入3-D动力学/热力学海冰模型； d）评估是否可以对3-D模型进行进一步的简化以提高计算效率e）进行盆地范围的模拟以评估模型性能与观测值进行比较并评估对热通量和动量扰动的模型敏感性。 这项工作的产物将是一种全面的，模块化的，有据可查的且可公开的3-D海冰模型，可以作为参与极地应用的各种研究人员的工具，并且可以为区域和气候系统模型提供改进的海冰组件。