Red Sea Outflow Experiment, Data Analysis and Synthesis

2001年，红海流出实验（REDSOX）首次获得了红海流入亚丁湾的全面调查结果。REDSOX的目标是(i)描述下降流出流柱的路径和下游演化，（ii）量化控制平衡红海流出水最终深度的过程，以及（iii）确定红海流出水平流及其特性通过亚丁湾进入印度洋的运输过程和机制。野外试验和最终数据处理已顺利完成，项目初步成果已发表。这笔拨款支持对两次REDSOX巡航期间收集的部分数据进行分析和综合，如高分辨率水文和直流电调查以及湍流混合的直接测量。分析将集中于下列具体目标。用基于倾覆尺度的相应的“直接”估计来合理化下降羽流的夹带、总应力和夹带应力的总体估计。探索两个流出通道的三维循环，重点是旋转的影响。分析海床上的雷诺应力和湍流结构，并将底部应力与界面应力联系起来。将红海羽流的性质和动态与其他流出物（如地中海流出物）进行比较，试图将有关其他羽流的结果加以概括，并扩大综合活动的范围和影响。完成的综合将提供对红海流出和亚丁湾相关循环过程的详细见解。它将提高对下降羽流的总体理解，特别是对夹带和混合的关键过程的理解。这些知识对于改善海洋环流和气候模式中这些过程的参数化至关重要。

ABSTRACTOCE-0351116In 2001 the Red Sea Outflow Experiment (REDSOX) obtained the first comprehensive survey of the outflow of Red Sea water into the Gulf of Aden. The objectives of REDSOX were (i) to describe the pathways and downstream evolution of the descending outflow plumes, (ii) to quantify the processes that control the final depth of the equilibrated Red Sea outflow water, and (iii) to identify the transport processes and mechanisms that advect Red Sea outflow Water and its properties through the Gulf of Aden and into the Indian Ocean. The field experiment and the final data processing have been successfully completed, and first results from the project have been published. This grant supports the analysis and synthesis of part of the data collected during the two REDSOX cruises such as high-resolution hydrographic and direct current surveys and direct measurements of turbulent mixing. The analysis will focus on the following specific objectives.1. Rationalize bulk estimates of entrainment, total stress and entrainment stress of thedescending plume with corresponding "direct" estimates based on overturning scales.2. Explore the three-dimensional circulation in the two outflow channels with focus on theeffects of rotation.3. Analyze Reynolds stress and turbulence structure above the sea floor and relate thebottom stress to the interfacial stress.4. Compare the properties and dynamics of the Red Sea plume with other outflows, suchas the outflow from the Mediterranean, to attempt to generalize the results with respectto other plumes and broaden the scope and impact of the synthesis activities.The completed synthesis will provide detailed insight into the Red Sea outflow and relatedcirculation processes in the Gulf of Aden. It will improve the understanding of descendingplumes in general, especially of the critical process of entrainment and mixing. Such knowledge is crucial for improved parameterizations of these processes in ocean circulation and climate models.