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.

北冰洋模型比对项目 (AOMIP) 研究建议对北冰洋研究进行两项关键的模型改进：1) 提高模型水平和垂直网格分辨率；2) 在模型动力学中纳入潮汐运动，以提供基于物理的水平和垂直变化的混合率。垂直方向取决于潮汐流和冰潮相互作用。这项工作旨在完成新的北冰洋高分辨率非结构化网格有限体积耦合冰海模型（AO-FVCOM）的开发和评估，并利用该模型研究海岸线拟合、陡峭水深测量的影响、潮汐和潮汐过程、表面风应力、热通量、大气负荷、沿海淡水强迫、冰动力学以及北冰洋环流和水团/海冰分布和变化的边界强迫。计划遵循 AOMIP 规范的 AO-FVCOM 后播实验和面向过程的实验。这些模拟将量化沿海几何和测深分辨率对复杂的加拿大群岛和其他沿海海域的循环和淡水输送的影响以及群岛、北极盆地和北大西洋之间的交换过程，并提供对非线性相互作用的新见解海洋环流、大气强迫、海冰、潮汐以及随时间变化的河流流量和白令海峡流入之间的关系及其对北冰洋海洋学的不同影响。 AO-FVCOM 将是一个通过项目网站提供的开放社区模型系统。该项目将提供新的高分辨率非结构化网格、有限体积北冰洋模型（AO-FVCOM），用于区域和全球海洋环流和气候变化研究。由于非结构化网格方法固有的几何灵活性以及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 与现有的北冰洋结构化网格模型显着不同。使用 AOMIP 强迫和分析方法的 AO-FVCOM 后报将有助于评估 AO-FVCOM 的长期海洋和气候变化研究，而 AO-FVCOM 面向过程的实验将增进我们对潮汐、海冰、风之间非线性相互作用的理解应力、热通量、大气负荷以及随时间变化的河流流量和边界流入对北冰洋海洋环流、水结构和海冰的影响。 AO-FVCOM开发和模型实验将提供一个令人兴奋的新工具来研究北冰洋和北大西洋之间的联系（特别是通过加拿大群岛），并允许对高纬度浮力驱动的沿海边界流进行直接数值模拟，该边界流驱动大陆架和从拉布拉多南部到哈特拉斯角的上坡环流。