Air-Sea-Ice Interaction in the Western Weddell Sea

西威德尔海的气-海-冰相互作用

• 批准号: 9814024
• 负责人: Edgar Andreas
• 金额: $ 15万
• 依托单位: Department of Army Cold Regions Research & Engineering Lab
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814024&HistoricalAwards=false
• 关键词: Air; Sea; Ice; Interaction; Western

This work consists of the continued analysis of a comprehensive data set on the structure of the winter-time atmospheric boundary layer over the antarctic sea ice cover. The measurements covered the upper ocean, the sea ice, and the lower atmosphere from late austral summer into the austral winter of 1992. While significant results have come from the analysis, two areas need to be examined further: the formulation of a stability correction to Monin-Obukhov similarity theory, and the application of a one-dimensional model of surface energy and mass balance model to synthesize the earlier studies, and to simulate all components of the surface heat budget throughout the entire observation period. The Monin-Obukhov Similarity Theory is a universally applied theory to explain the structure of the atmospheric surface layer, and the vertical exchange processes of energy and momentum. It is called the similarity theory because it postulates that both exchange processes are a function of a single length scale. The length scale however is an empirical function of the stability of the atmosphere and is not firmly grounded at the very high stability's found over the ice cover. The model that will be applied to the data set has been successfully used to simulate exchange processes in the stable surface layer over snow, and will be extended to the sea ice situation.

这项工作包括继续分析关于南极海冰覆盖层上空冬季大气边界层结构的一组综合数据。 从1992年南半球夏末到南半球冬季的测量覆盖了上层海洋、海冰和低层大气。 虽然显着的结果来自分析，两个领域需要进一步研究：制定一个稳定性校正莫宁-奥布霍夫相似理论，和应用一维模型的表面能量和质量平衡模型，以综合早期的研究，并模拟所有组件的表面热收支在整个观测期间。 莫宁-奥布霍夫相似理论是解释大气近地层结构以及能量和动量垂直交换过程的普遍适用理论。 它被称为相似性理论，因为它假设两个交换过程都是单一长度尺度的函数。 然而，长度尺度是大气稳定性的经验函数，在冰盖上发现的非常高的稳定性并没有牢固的基础。 将应用于数据集的模型已成功地用于模拟雪上稳定表层的交换过程，并将扩展到海冰情况。