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: 2319545
• 负责人: Glenn Carter
• 金额: $ 118.39万
• 依托单位: University of Hawaii
• 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=2319545&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.

该项目将对深海海沟进行首次物理海洋学调查，重点关注克马德克海沟的空间梯度和深渊通风的潜在机制。观测将使用两个独特且互补的 11 公里深度自由落体系统进行。深渊水柱剖面仪和深渊自主剖面仪——用于检查沟槽通风的模式和潜在机制，将包括首次直接测量深渊湍流微观结构、首次深度速度剖面和首次直接测量深渊湍流微观结构。检查沿沟槽长度的物理或生物水柱梯度。现场观测包括两个独特且互补的 11 公里深度仪器的多个并置部署。Hadal 水柱剖面仪测量温度、电导率、溶解氧、水平电流它还有一个摄像机和一个小型微量金属清洁水采样器，可测量温度、该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。