Seafloor Fiber Optic Array in Monterey Bay (SEAFOAM)

蒙特利湾海底光纤阵列 (SEAFOAM)

• 批准号: 2023301
• 负责人: Gregory Beroza
• 金额: $ 66.62万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2023301&HistoricalAwards=false
• 关键词: Seafloor; Fiber; Optic; Array; Monterey

The ocean covers 70% of the surface of our planet, but the underwater environment is limited by access and by exceptionally high costs and complex logistics. Yet, underwater measurements are crucial for offshore seismic hazard, tsunami and earthquake early warning, submarine volcano science, and crustal and deep earth imaging. Strategies explored so far to access the seafloor require expensive field campaigns, including several days to weeks of ship time, and long-term management either of cabled nodes, ships, or instrument pools. Upscaling any strategy to monitor the seafloor worldwide is difficult to envision. Fiber-optic sensing provides a novel promising avenue for making high-resolution seafloor measurements offshore and tackling the scientific questions that cannot be answered otherwise.Following recent short-time successful experiments offshore, this research proposes to develop the first continuously operating Distributed Acoustic Sensing (DAS) experiment in a marine environment using the Monterey Accelerated Research System (MARS) cable in Monterey Bay, CA. The Seafloor seismology with a Fiber-Optic Array in Monterey Bay (SEAFOAM) project will demonstrate, calibrate, use, and expand the capabilities of fiber-optic sensing in marine geophysics, including growing the DAS user community through release of open access data. The project consists of a 1-year experiment with the MARS cable in order to record earthquakes, and extend our knowledge of the ambient seismic background wavefield recording interval over several tidal, storm, and seasonal cycles. This project will also deliver a software-hardware system that will provide an example pathway for continuous, real-time, open DAS data streaming to a seismological data archive.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.

海洋覆盖了我们星球表面的70％，但是水下环境受到通道的限制，并且成本高昂和复杂的物流受到限制。然而，水下测量对于近海地震危害，海啸和地震预警，海底火山科学以及地壳和深层地球成像至关重要。迄今为止探索了进入海底的策略需要昂贵的现场活动，包括几天到几周的时间，以及有能力的节点，船只或仪表池的长期管理。很难设想，要提高监视全球海底的任何策略。光纤传感提供了一个新颖的途径，用于在海上进行高分辨率的海底测量，并解决无法否则无法回答的科学问题。从近期近海近海近海进行了近海，这项研究建议开发第一个连续运行的经过分布的声学传感（DAS）在海上环境中使用MONTERETER ECCEREY CACELEREY CACELEREREREREN（MARSEREY CACELERERE）（MARSEREY CACELEREN）（DAS）的实验（DAS）（DAS）（DAS）。在蒙特雷湾（Seafoam）项目中具有光纤阵列的海底地震学项目将展示，校准，使用和扩展海洋地球物理学中光纤传感的能力，包括通过发布开放访问数据来增强DAS用户社区。该项目由对火星电缆进行的为期1年的实验，以记录地震，并在几个潮汐，风暴和季节性周期上扩展了我们对环境地震背景波场记录间隔的了解。该项目还将提供一个软件硬件系统，该系统将为持续，实时，开放的DAS数据流提供一个示例途径，直达地震数据存档。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响评估标准通过评估来进行评估的。

项目成果

SeaFOAM: A Year-Long DAS Deployment in Monterey Bay, California

• DOI: 10.1785/0220230047
• 发表时间: 2023-06
• 期刊: Seismological Research Letters
• 影响因子: 3.3
• 作者: B. Romanowicz;R. Allen;K. Brekke;Li-Wei Chen;Yuancong Gou;I. Henson;Julien Marty;D. Neuhauser;Brian Pardini;T. Taira;Stephen Thompson;Junli Zhang;S. Zuzlewski