Modelling the Effects of Eddies and Mean Flows on Southern Ocean Biology

模拟涡流和平均流对南大洋生物的影响

• 批准号: 9910052
• 负责人: Glenn Flierl
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-15 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9910052&HistoricalAwards=false
• 关键词: Modelling; Effects; Eddies; Mean; Flows

This project is an attempt to understand the interactions of biological and physical dynamics by modeling the spatial distribution of antarctic krill, a small crustacean that forms dense aggregations or patches on the small scale. The spatial distribution of these patches appear to depend on the advance and retreat of the sea ice, the three dimensional movement of water masses from small scale turbulence to the dynamics of the Antarctic Circumpolar Current, as well as on food supply and predation pressure. Prior work has shown that physical processes dominate on the larger scale, while biological processes dominate on the smaller scale, but the relative importance of the two as a function of scale has not been investigated systemically.This work will be carried out in the context of the Southern Ocean Experiment of the Global Ocean Ecosystem Dynamics Study (Globec), a large, multi-investigator study of the winter survival strategy of krill under the antarctic sea ice.The problem of accurately representing patchiness in a circum-antarctic model is that of properly representing effects that occur on a scale that is not resolved in the model. The approach that will be used here is to first study a detailed model that can resolve the scale of krill patches and can help to analyze and understand the observations that will be made in the Experiment. These results will allow us not only to make a more quantitative estimation of the errors involved, but also to improve the parameterization of krill distributions in meso-scale and basin-scale models of the Southern Ocean.***

该项目试图通过模拟南极磷虾的空间分布来了解生物和物理动力学的相互作用，南极磷虾是一种小型甲壳类动物，在小尺度上形成密集的聚集体或斑块。 这些补丁的空间分布似乎取决于海冰的进退，从小尺度湍流的动态南极绕极流的水团的三维运动，以及食物供应和捕食压力。 先前的工作表明，物理过程在较大尺度上占主导地位，而生物过程在较小尺度上占主导地位，但两者作为尺度函数的相对重要性尚未得到系统研究，这项工作将在全球海洋生态系统动力学研究（Globec）的南大洋实验范围内进行，这是一个大型的，南极海冰下磷虾冬季生存策略的多研究者研究。在环南极模型中准确表示斑块的问题是正确表示在模型中未解决的尺度上发生的影响。 这里将使用的方法是首先研究一个详细的模型，该模型可以解决磷虾斑块的规模，并有助于分析和理解实验中将进行的观察。 这些结果将使我们不仅能够对所涉及的误差进行更定量的估计，而且还可以改进南大洋中尺度和流域尺度模型中磷虾分布的参数化。