Abyssal Mixing Measurements for the Brazil Basin Tracer Release Experiment

9415589施密特全水柱湍流，速度剪切和精细结构的测量将是 在巴西海盆的两个深海地点（靠近西部边界， 在内部），同时在3000米深度有目的地释放示踪剂。隔膜 巴西盆地深处的扩散率将根据 动能和热方差的耗散以及内波的能级 并记录支持这种混合的机制。基于微结构的 扩散率估计，有限的采样constants在空间和时间将与 由Ledwell及其同事（OCE-9515598）从其示踪剂分散体中获得。 另外，还将与根据以下公式确定的盆地平均混合速率进行比较： WOCE深盆实验的大规模预算。

9415589 Schmitt Full water column turbulence, velocity shear and fine-structure measurements will be conducted in the deep ocean at two sites in the Brazil Basin (near the western boundary and in the interior) concurrently with a purposeful tracer release at 3000 m depth. The diapycnal diffusivity in the deep Brazil Basin will be estimated from the observation from the dissipation of kinetic energy and thermal variance, and the nergy levels of internal waves and the mechanisms supporting that mixing will be documented. The microstructure-based diffusivity estimates, limited by sampling constaints in space and time will compared with those obtained by the Ledwell and colleagues (OCE-9515598) from their tracer dispersion. Additional comparisons will be made with the basin-averaged mixing rates determined from the large-scale budgets of the WOCE Deep Basin Experiment.