Mesoscale Circulation, Tides and Mixing on the Western Antarctic Peninsula Shelf: A Component of WINDSSOCK (ESR proposal #99-48)

该项目通过发展南极冬季冰雪覆盖的演变、生物栖息地的变异性和海洋生态过程的季节性进展之间的关系，对理解生物和物理动力学的相互作用作出了协调的贡献。这项工作将在全球海洋生态系统动力学研究（Globec）的南大洋实验的背景下进行，这是一项大型的多研究员研究南极半岛西侧玛格丽特湾附近南极海冰下磷虾冬季生存策略的研究。该项目包括几个方面：一是收集、分析和存档多普勒电流剖面仪（ADCP）和电导率-温度-深度（CTD）数据，以表征中尺度环流特征和区域水文特征。另一个目标是建立一个准确和充分验证的玛格丽特湾潮流模型。第三是提供小尺度过程的数据集，如剪切不稳定性、潮汐搅拌、中尺度涡流和双重扩散，这些都是有效参数化热、盐和营养物质垂直扩散率所必需的。该项目的结果将提供一个统一的数据集，以满足协调化学和生物学研究的数据要求，将水柱和海冰过程与磷虾及其捕食者的生物学联系起来。这些结果将进一步有助于将这些冬季观测结果与在全球计划的国际背景下在夏季和南极其他地方进行的类似观测结果联系起来。总体目标是建立一个全面的生态系统模型，以测试我们对该系统的理解，确定其敏感性，并为整合南大洋全球观测提供一个组织机制。＊＊＊

This project is a contribution to a coordinated attempt to understand the interactions of biological and physical dynamics by developing relationships among the evolution of the antarctic winter ice and snow cover, biological habitat variability, and the seasonal progression of marine ecological processes. The 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 in the vicinity of Marguerite Bay on the western side of the Antarctic Peninsula.There are several aspects to this project: One is the collection, analysis, and archiving of Acoustic Doppler Current Profiler (ADCP), and Conductivity-Temperature-Depth (CTD) data in order to characterize mesoscale circulation features and the regional hydrography. Another is to develop an accurate and fully validated model of tidal currents in Marguerite Bay. A third is to provide a data set of small-scale processes such as shear instabilities, tidal stirring, mesoscale eddies, and double diffusion, that are required for the effective parameterization of the vertical diffusivities of heat, salt, and nutrients. The results of this project will provide a unified data set that satisfies the data requirement of the coordinated chemical and biological studies which will link water column and sea ice processes with the biology of krill and its predators. The results further will help to link these winter observations to similar observations made in summer and elsewhere around Antarctic in the international context of the Globec program. The overall objective is to develop a comprehensive ecosystem model that will test our understanding of the system, determine its sensitivities, and to provide an organizing mechanism for integrating the Southern Ocean Globec observations. ***