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？“将开发一种用于气候应用的新的3-D海冰模型。这项研究的动机是1-D的热力学和2-D的动态/CO2模型（广泛用于气候模拟）的响应之间的巨大差异的表面热通量扰动，如将产生从CO2倍增。 海冰中发生的重要物理过程仍然不清楚，需要进一步的观测数据（和对现有数据的分析）。然而，有足够的量已知的个别物理过程和显着的进展，可以在海冰模拟合成的国家的最先进的理解，目前包括在一维和二维模型到一个3-D动态/热力学海冰模型的不同物理过程。在这方面，调查员的研究小组最近开发的单单元热力学/动力学海冰模型的成功非常令人鼓舞。在以往和正在进行的研究活动的基础上，将按以下方式建立海冰模型，以应用于气候模型; （a）改进单单元热力学/动力学海冰模型，并根据 实地和卫星观测B）使用单格模型进行敏感性研究，以评估为提高计算效率而可以进行的简化，c）将单格研究中认为必要的过程纳入三维动态/热力学海冰模型; d）评估是否可以对三维模型进行进一步简化以提高计算效率e）进行全流域模拟，以评估与观测结果相比的模型性能，并评估模型对热通量和动量扰动的敏感性。 这项工作的一个产品将是一个全面的，模块化的，有据可查的，可作为参与极地应用的各种研究人员的工具，可为区域和气候系统模型提供改进的海冰组成部分。