Ice-Ocean Interactions on the Okhotsk Sea Shelf

鄂霍次克海陆架上的冰海相互作用

• 批准号: 0526011
• 负责人: LuAnne Thompson
• 金额: $ 44.22万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0526011&HistoricalAwards=false
• 关键词: Ice; Ocean; Interactions; Okhotsk; Sea

0526011The Okhotsk Sea plays an important role in the North Pacific Ocean circulation through its influence on the formation of the North Pacific Intermediate Water (NPIW). In addition, it has a highly variable sea ice cover, which influences not only water mass formation, but also the atmospheric circulation over the sub-polar North Pacific. The dense water formed along the Okhotsk Sea shelves is the source of this NPIW and depends critically on the details of the coastal polynyas and tidal mixing, and their relation to the stratification and mean circulation. Though recent observations have shown that brine rejection from sea ice sinks at the tidal front over the shelves, many questions remain as to the relationship among polynya openings, ice production, ocean-ice heat exchange, and shelf dynamics. Intellectual merit:In this project, oceanographers at the University of Washington will perform a series of sensitivity experiments with a regional coupled ice-ocean model to investigate the sea ice and water mass formation and their inter-annual variability. In addition to coupling the Regional Ocean Model System, a terrain following coastal ocean model, and the Community Sea Ice Model, a sophisticated dynamic-thermodynamic sea ice model, the researcher will also employ new, high quality datasets for model forcing, initialization, and verification. The outcomes of the work will include an integration of available data with a model of the Okhotsk Sea that will also take into account the important physical oceanographic processes in the region. An analysis of the heat and fresh water budgets of the region will also be made, focusing on both the seasonal cycle and inter-annual variability. The dense water formation in the model will be quantified, and the sensitivity of the model to the influence of tides will be tested. In addition to the regional modeling, the researcher will also analyze the influence of the Okhotsk Sea on a larger scale using the Community Climate System Model (CCSM, a global climate model). The regional ocean-ice model will be used to estimate the importance of processes that are absent from the CCSM. Broader Impacts:The results from this work will not only lead to an improved understanding of polynyas but also to the potential global importance of the Okhotsk Sea. In addition to training a graduate student, the work will also develop a partnership with the Community Climate System Model project at NCAR. The use of the CCSM sea-ice model in a regional context will help with future development of the CCSM as the new generation of super-computers allow for higher resolution climate simulations.

0526011 Okhotsk Sea通过影响北太平洋中间水（NPIW）的形成，在北太平洋循环中起着重要作用。此外，它具有高度可变的海冰覆盖物，这不仅会影响水质量的形成，还会影响北太平洋亚北太平洋上的大气循环。沿着Okhotsk海货架形成的密集水是该NPIW的来源，并急剧取决于沿海Polynyas和潮汐混合的细节，以及它们与分层和平均循环的关系。尽管最近的观察结果表明，货架上潮汐阵线的盐水排斥被搁浅，但关于Polynya开口，冰生产，海洋冰热交换和货架动力学之间关系的许多问题仍然存在。知识分子的优点：在这个项目中，华盛顿大学的海洋学家将使用区域耦合的冰山模型进行一系列敏感性实验，以研究海冰和水质量形成及其年际变化。 除了结合区域海洋模型系统，沿海海洋模型之后的地形以及一个复杂的动态热力学海冰模型的社区海冰模型外，研究人员还将采用新的高质量数据集来用于模型强迫，初始化和验证。 这项工作的结果将包括将可用数据与Okhotsk Sea的模型集成在一起，该模型还将考虑该地区重要的物理海洋学过程。还将对该地区的热量和淡水预算进行分析，重点是季节性周期和年际变化。将量化模型中密集的水的形成，并将测试模型对潮汐影响的敏感性。 除区域建模外，研究人员还将使用社区气候系统模型（CCSM，全球气候模型）在更大范围内分析Okhotsk Sea的影响。 区域海冰模型将用于估计CCSM缺乏的过程的重要性。 更广泛的影响：这项工作的结果不仅会提高人们对Polynyas的了解，而且还会带来Okhotsk Sea的潜在全球重要性。 除了培训研究生外，这项工作还将与NCAR的社区气候系统模型项目建立合作伙伴关系。在区域环境中使用CCSM SEA-ICE模型将有助于CCSM的未来开发，因为新一代超级计算机允许更高分辨率的气候模拟。