Collaborative Research: Exploring the Kermadec Trench --- Residence time, spatial gradients, and insights into ventilation

合作研究：探索克马德克海沟——停留时间、空间梯度和通风见解

• 批准号: 2319546
• 负责人: James Girton
• 金额: $ 40.96万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-11-01 至 2026-10-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2319546&HistoricalAwards=false
• 关键词: Collaborative; Research; Exploring; Kermadec; Trench

This project will conduct the first physical oceanography survey of a deep ocean trench, focusing on spatial gradients and potential mechanisms of hadal ventilation in the Kermadec Trench. The observations will be made using two unique and complimentary 11 km depth-rated free-falling systems – the Hadal Water Column Profiler and the Deep Autonomous Profiler – to examine patterns and potential mechanisms of trench ventilation. Observations will include the first direct measurements of hadal turbulent microstructure, the first depth profiles of velocity, and the first examination of physical or biological water column gradients along the length of a trench.The field observations consist of multiple collocated deployments of two unique and complimentary 11 km depth-rated instruments. The Hadal Water Column Profiler measures temperature, conductivity, dissolved oxygen, horizontal current velocity, turbulent microstructure, and sideways looking 200 kHz bio-acoustic backscatter. It also has a video camera and a small trace metal-clean water sampler. The Deep Autonomous Profiler measures temperature, conductivity, and dissolved oxygen, and has a downward looking camera and twenty-four 10-liter bottle water sampler.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将对深海沟渠进行首次物理海洋学调查，重点介绍了在克马德克沟渠中的空间梯度和潜在的哈达尔通风机制。这些观察结果将使用两个独特而免费的11公里深度率的自由落体系统（Hadal Water Pounder profiler和Deep Autonomous Profiler）进行检查，以检查沟槽通风的模式和潜在机制。观察结果将包括对Hadal水柱的首次直接测量，用于温度，电导率，溶解的氧，水平电流速度，湍流微结构以及侧面，侧向看起来200 kHz生物声音反向分类。它还具有摄像机和一个小的痕量金属清洁水采样器。深度自主探查器测量温度，电导率和溶解的氧气，并具有向下看的相机和二十四个10升瓶水采样器。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛影响的评估来评估的珍贵支持。