Mixed Layer Turbulence Measurements during the ANZONE Winter Flux Experiment: ANZFLUX

拟议的工作是威德尔海东部上部混合层海洋学结构综合研究项目（“Anzflux”）的一部分。它将在1994年南部冬季从纳撒尼尔·b·帕尔默RVIB进行。这里提出的工作是部署三种仪器系统来测量从斜斜（一个将高密度深水和低密度地表水分开的表面）向上到海洋-冰界面的动量、热量和盐通量。在表层，这些仪器系统将提供直接通量和耗散测量的层次，这些测量将识别几个动态不同的层：表面恒定应力层，湍流边界层和活跃混合层。这些测量的连续时间序列将在两个15天漂移站中的每一个进行，以观察静止的背景条件，以及上层海洋对该地区特征的短暂，严重的风暴系统的反应。这些测量，连同其他同时进行的实验，将量化带到冰底的能量，将构成对造成相对较厚的上层混合层和薄冰盖的过程的区域研究的基础。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，可能导致深垂直对流，并在海洋气候中发生重大变化。＊＊＊

9316498 Stanton 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 the deployment of three instrument systems to measure momentum, heat, and salt fluxes from the pycnocline (a surface separating higher density deep water from lower density surface water) upward to the ocean-ice interface. In the surface layer these instrument systems will provide a hierarchy of direct flux and dissipation measurements which will identify several dynamically distinct layers: the surface constant stress layer, the turbulent boundary layer, and the active mixed layer. Continuous time series of these measurements will be made at each of the two fifteen day drift stations to observe both quiescent background conditions, and the response of the upper ocean to the short, severe, storm systems that are characteristic of the area. 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. ***