Collaborative Research: Development of A High-Resolution, Unstructured Grid, Finite-Volume Coupled Ice-Ocean Model for the Arctic Ocean

合作研究：开发北冰洋高分辨率、非结构化网格、有限体积耦合冰海模型

• 批准号: 0712903
• 负责人: Changsheng Chen
• 金额: $ 21.42万
• 依托单位: University of Massachusetts, Dartmouth
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0712903&HistoricalAwards=false
• 关键词: Collaborative; Research; Development; Resolution; Unstructured

Arctic Ocean Model Intercomparison Project (AOMIP) studies recommend two key model improvements for Arctic Ocean research: 1) increase model horizontal and vertical grid resolution and 2) include tidal motions in the model dynamics to provide physically-based mixing rates that vary both horizontally and vertically depending on tidal currents and ice-tide interactions. This effort seeks to complete the development and evaluation of a new high-resolution unstructured-grid, finite-volume coupled ice-ocean model for the Arctic Ocean (AO-FVCOM) and use this model to investigate the influences of coastline fitting, steep bathymetry, tides and tidal processes, surface wind stress, heat flux, atmospheric loading, coastal freshwater forcing, ice dynamics, and boundary forcing on Arctic Ocean circulation and water mass/sea ice distributions and variability. Both AO-FVCOM hindcast experiments following AOMIP specifications and process-oriented experiments are planned. These simulations will quantify the impacts of coastal geometry and bathymetry resolution on circulation and freshwater transport in the complex Canadian Archipelago and other coastal seas and the exchange processes between the Archipelago, Arctic basins, and the North Atlantic, plus provide new insight into the nonlinear interactions between ocean circulation, atmospheric forcing, sea ice, tides, and time-dependent river discharge and Bering Strait inflow and their different influences on Arctic Ocean oceanography. AO-FVCOM will be an open community model system available through the project website.This project will provide a new high-resolution unstructured-grid, finite volume Arctic Ocean model (AO-FVCOM) for use in regional and global ocean circulation and climate change studies. AO-FVCOM is significantly different from existing Arctic Ocean structured-grid models due to the geometric flexibility inherent in the unstructured-grid approach and the local mass, momentum, heat, and salt conservation and computational efficiency inherent in the finite-volume approach. AO-FVCOM hindcasts using AOMIP forcing and analysis methods will help evaluate AO-FVCOM for long-term ocean and climate change studies, while the AO-FVCOM process-oriented experiments will advance our understanding of the nonlinear interactions between tides, sea ice, wind stress, heat flux, atmospheric loading, and time dependent river discharge and boundary inflow on ocean circulation, water structure and sea ice in the Arctic Ocean. AO-FVCOM development and model experiments will provide an exciting new tool to study the linkages between Arctic and North Atlantic Oceans (especially through the Canadian Archipelago) and allow direct numerical simulation of the high-latitude buoyancy driven coastal boundary current that drives the shelf and upper slope circulation from Labrador south to Cape Hatteras.

北冰洋模式相互比较项目（AOMIP）的研究为北冰洋研究提出了两个关键的模式改进建议：1）提高模式的水平和垂直网格分辨率; 2）在模式动力学中包括潮汐运动，以提供基于物理的混合率，该混合率根据潮流和冰潮相互作用在水平和垂直方向上变化。这项工作旨在完成一个新的北冰洋高分辨率非结构网格有限体积耦合冰-海模型的开发和评价（AO-FVCOM），并利用该模式研究了海岸线拟合、陡水深测量、潮汐和潮汐过程、表面风应力、热通量、大气负荷、海岸淡水强迫、冰动力、以及对北冰洋环流和水团/海冰分布和变率的边界强迫。AO-FVCOM后报实验AOMIP规范和面向过程的实验计划。这些模拟将量化海岸几何形状和测深分辨率对复杂的加拿大群岛和其他沿海海域的环流和淡水运输以及群岛，北极盆地和北大西洋之间的交换过程的影响，并提供新的见解海洋环流，大气强迫，海冰，潮汐，和随时间变化的河流流量和白令海峡入流及其对北冰洋海洋学的不同影响。AO-FVCOM将是一个开放的社区模式系统，可通过项目网站查阅，该项目将提供一个新的高分辨率非结构网格有限体积北冰洋模式（AO-FVCOM），用于区域和全球海洋环流和气候变化研究。AO-FVCOM与现有的北冰洋结构网格模型有很大的不同，这是由于非结构网格方法固有的几何灵活性和有限体积方法固有的局部质量、动量、热量和盐守恒以及计算效率。AO-FVCOM后报采用AOMIP强迫和分析方法，将有助于评估AO-FVCOM长期海洋和气候变化研究，而AO-FVCOM过程为导向的实验将促进我们的非线性之间的相互作用的认识，潮汐，海冰，风应力，热通量，大气负荷，并随时间变化的河流流量和边界流入的海洋环流，水结构和海冰在北冰洋。AO-FVCOM的开发和模型实验将提供一个令人兴奋的新工具，研究北极和北大西洋之间的联系（特别是通过加拿大群岛），并允许直接数值模拟高纬度浮力驱动的沿海边界流，驱动从拉布拉多南部到哈特拉斯角的陆架和上斜坡环流。