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首页> 美国政府科技报告 >Turbulence Measurement Surveys in the Convectively Driven Upper Mixed Layer and Close-Bottom Boundary Layer Over a Continental Shelf During a Storm Front.
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Turbulence Measurement Surveys in the Convectively Driven Upper Mixed Layer and Close-Bottom Boundary Layer Over a Continental Shelf During a Storm Front.

机译：在风暴前方大陆架上对流驱动的上混合层和近底边界层的湍流测量调查。

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The principal objective of this work is to contribute to the development of effective remote autonomous mine countermeasure operations by providing pertinent flow, heat flux and sediment transport characteristics in the benthic boundary layer to missions engaged in sea mine reconnaissance and hunting. These environmental characteristics govern acoustic and light propagation, chemical and biogenic activity in the bottom boundary layer, distribution of sediment over a buried mine and other physical processes, knowledge of which is critical to the effective performance of acoustical, chemical or other sensory-based methods for mine detection and MCM operations. To address these issues, comprehensive numerical models of the flow in a shallow water column are required. The aim is collect significant data to help parameterize sub-grid processes in such a numerical model and develop an associated accurate sub-grid scale model. The specific objectives of the proposed project are (a) To develop an internet accessible data bank of four dimensional measurement of turbulence in the shallow water column during the passage of a cold front, together with measurement of bubble distribution in the upper mixed layer and sediment distribution in the close-bottom boundary layer, for validating and formulating models of the dynamics of the water column during such a storm, (b) to examine the interrelationship between in- situ turbulence levels associated with breaking waves in the upper mixed layer and acoustic noise, sonar reverberations and acoustic propagation in a water column atmospherically forced by a cold front.

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