Heat, Salt, and Momentum Fluxes Through the Pycnocline in the Eastern Weddell Sea

东威德尔海密斜斜层中的热、盐和动量通量

• 批准号: 9317321
• 负责人: Laurence Padman
• 金额: $ 32.54万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-15 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317321&HistoricalAwards=false
• 关键词: Heat; Salt; Momentum; Fluxes; Through

9317321 Padman The proposed work is part of an integrated research program ("Anzflux") into the oceanographic structure of upper mixed layer of the eastern Weddell Sea. It is to be carried out from the RVIB Nathaniel B. Palmer in the austral winter of 1994. The work proposed here is an effort to measure high frequency vertical profiles of velocity and temperature using a Rapid Sampling Vertical Profiler, a tethered sensor system developed by the principal investigator that free falls through the upper 250 meters of the ocean. The objective is to study the dynamics of momentum and energy fluxes in the upper mixed layer, and to investigate the processes that determine the stability of the pycnocline. Particular emphasis will be placed on the response of the pycnocline to the mesoscale velocity field, internal waves, and other coherent turbulence features. These measurements, in conjunction with other concurrent experiments to quantify the energy brought to the underside of the ice, will form the basis of a regional study of the processes responsible for the relatively thick upper mixed layer and thin ice cover. It is believed that these conditions are only marginally stable, and are maintained by a relatively high upward heat flux, which, if interrupted, could lead to deep vertical convection, and a significant change in the oceanic climate. ***

9317321帕德曼拟议的工作是对东部韦德尔海上层混合层的海洋结构的综合研究计划(“ANZFlux”)的一部分。它将于1994年南冬从RVIB纳撒尼尔·B·帕尔默进行。这里提出的工作是使用快速采样垂直剖面仪测量高频垂直速度和温度剖面，这是一种由首席调查员开发的绳系传感器系统，可以自由落体穿过海洋250米以上。目的是研究上层混合层中动量和能量通量的动力学，并研究决定跃层稳定性的过程。将特别强调跃层对中尺度速度场、内波和其他相干湍流特征的响应。这些测量，连同其他同时进行的量化冰下能量的实验，将构成对造成相对较厚的上层混合层和较薄的冰盖的过程进行地区性研究的基础。据信，这些条件只是略微稳定，并由相对较高的向上热通量维持，如果中断，可能会导致深度垂直对流和海洋气候的显著变化。***