Red Sea Outflow Experiment, Data Analysis and Synthesis

2001年，红海外流实验（REDSOX）首次对流入亚丁湾的红海水进行了全面调查。REDSOX的目标是（i）描述下降外流羽流的路径和下游演变，（ii）量化控制平衡红海外流水最终深度的过程，以及（iii）确定通过亚丁湾将红海外流水及其特性平流输送到印度洋的输送过程和机制。 现场实验和最终数据处理已经成功完成，项目的第一批成果已经公布。这笔赠款用于分析和综合两次REDSOX航行期间收集的部分数据，如高分辨率水文和直流测量以及湍流混合的直接测量。分析将侧重于以下具体目标。将下降羽流的卷吸、总应力和卷吸应力的总体估计值与基于翻转尺度的相应“直接”估计值进行比较.探讨两个流出通道的三维环流，重点研究旋转的影响.分析了海底雷诺应力和湍流结构，并将海底应力与界面应力联系起来.将红海羽流的性质和动力学与其他外流（如地中海外流）进行比较，试图将结果推广到其他羽流，并扩大综合活动的范围和影响。完成的综合将提供对红海外流和亚丁湾相关环流过程的详细了解。它将提高对下降羽流的一般理解，特别是卷吸和混合的关键过程。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.