Enhancement of Sea-Ice Processes in the Genesis GCM

9423506该项目是对国家大气研究中心正在开发的一个综合数字环境模型-全球环境和生态互动系统模拟模型-中海冰处理方法的改进。 这些增强将包括一个更具物理代表性的表面冰、来自冰中铅和其他开口的湍流热通量以及海冰覆盖的剪切强度。 该项目的另一个目标是调查GENESIS模型中使用的一些尚未充分研究的近似值的影响，这些近似值可能是冰的季节性异常分布的来源。 这些措施包括冰变形作为空化流体的处理和线性厚度分布的假设。 增强的GENESIS模型的输出将用一个独立的海冰模型和现有的北极表面数据进行测试和验证。 ***

9423506 This project is an enhancement to the treatment of sea ice in a comprehensive numerical environmental model -- the Global Environmental and Ecological Simulation of Interactive Systems (GENESIS) model -- being developed by the National Center for Atmospheric Research. The enhancements will include a more physically representative surface albedo, turbulent fluxes of heat from leads and other openings in the ice, and the shear strength of the sea ice cover. An additional goal of the project is to investigate the effects of some approximations used in the GENESIS model that have not been adequately studied, and which may be the source of seasonally anomalous distributions of ice. These include the treatment of ice deformation as a cavitating fluid and the assumption of a linear thickness distribution. The output of the enhanced GENESIS model will be tested and validated with a stand- alone sea ice model and with existing arctic surface data. ***