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

小行星9615524 拟议的工作是一个综合研究计划（“Anzflux”）的一部分，到东部威德尔海的上部混合层的海洋学结构所获得的数据集的扩展。 从RVI B Nathaniel B进行。 帕尔默在1994年的冬天。 综合方案的这一组成部分是努力使用快速取样垂直剖面仪测量速度和温度的高频垂直剖面，这是一种由首席研究员开发的系留传感器系统，可在海洋上部250米处自由福尔斯。 该项目的总体目标是研究上部混合层中动量和能量通量的动态，并调查决定密度跃层稳定性的过程。 特别强调的是，密度跃层的中尺度速度场，内波，和其他相干湍流功能的响应。 该扩展的具体目标是模拟与双扩散对流相关的热量和浮力通量，以及潮汐流对威德尔海上层混合的影响。 这些测量，结合其他同步实验，以量化带到冰底的能量，将形成区域研究的基础上，负责相对厚的上混合层和薄冰盖的过程。 据信，这些条件只是勉强稳定，并由相对较高的向上热通量维持，如果中断，可能导致深层垂直对流和海洋气候的重大变化。 ***

9615524 Padman The proposed work is an extension of the data set obtained as part of an integrated research program ("Anzflux") into the oceanographic structure of upper mixed layer of the eastern Weddell Sea. It was carried out from the RVIB Nathaniel B. Palmer in the austral winter of 1994. This component of the integrated program was 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 overall objective of this project 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 is placed on the response of the pycnocline to the mesoscale velocity field, internal waves, and other coherent turbulence features. The specific goal of this extension is to model the fluxes of heat and buoyancy associated with double-diffusive convection, and the impact of tidal currents on mixing in the upper layers of the Weddell Sea. 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. ***