Red Sea Outflow Experiment, Data Analysis and Synthesis

2001年，红海外流实验(RedSox)首次全面调查了红海海水流入亚丁湾的情况。RedSox的目标是(1)描述向下的流出羽流的路径和下游演变，(2)量化控制平衡的红海流出水最终深度的过程，以及(3)确定红海流出水及其性质通过亚丁湾进入印度洋的输送过程和机制。现场试验和最终数据处理均已顺利完成，并公布了项目的首批成果。这笔赠款支持对在两次RedSox巡航期间收集的部分数据进行分析和综合，例如高分辨率水文和直流调查以及湍流混合的直接测量。分析将侧重于以下具体目标1。使下降羽流的卷吸、总应力和卷吸应力的总体估计合理化，并根据颠覆的标尺进行相应的“直接”估计。探索两个流出通道内的三维环流，重点考察旋转的影响。分析了雷诺应力和海底上方的湍流结构，并将海底应力与界面应力联系起来。将红海羽流与地中海羽流等其他羽流的性质和动力学进行比较，试图将结果推广到其他羽流，扩大合成活动的范围和影响。完成合成将提供对红海羽流和亚丁湾相关环流过程的详细洞察。它将从总体上提高对羽流下降的理解，特别是对卷吸和混合的关键过程的理解。这些知识对于改进海洋环流和气候模型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.