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ALOHA Cabled Observatory Continuing Operations and Maintenance

ALOHA 有线天文台持续运营和维护

基本信息

批准号：
1539244
负责人：
Bruce Howe
金额：
$ 98.6万
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：
2015
资助国家：
美国
起止时间：
2015-10-01 至 2018-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1539244&HistoricalAwards=false
关键词：
ALOHA Cabled Observatory Continuing Operations

项目摘要

The long-term ocean monitoring site 100 km north of Oahu, Hawaii known as station ALOHA (A Long-term Oligotrophic Habitat Assessment) has been the location of repeated observations since the late 1980¡¦s. More recently, a deep-sea observatory, cabled to shore, was established near station ALOHA. The ALOHA Cabled Observatory (ACO) was deployed in June 2011 and supports innovative scientific research at Station ALOHA. The ACO provides the ocean science community with essential infrastructure and access for sustained science at Station ALOHA, an oligotrophic (¡§desert¡¨) site representative of a large fraction of the global ocean. As the deepest operational cabled station, it enables the development, testing and operation for science of new ocean observing sensors and technology, from the abyss to the surface. ALOHA is one setting where it will be possible to connect the ocean from top to bottom, both literally and figuratively, to improve understanding so we can model and predict for human impacts biogeochemical and physical processes at all temporal and spatial scales. For the past 27 years on a monthly schedule, the Hawai'i Ocean Time-series (HOT) project has been collecting ship-based oceanographic data; for the last 11 years, the Woods Hole Oceanographic Institution (WHOI) HOT Site (WHOTS) mooring has provided comprehensive meteorological and upper ocean data. These data together with those from many associated process studies form a unique, multivariate, long-term data set of the ocean state centered at one location. With the availability of relatively high power (1200 W), data bandwidth (100 Mb/s) and precise timing (1 ?Ýs), a basic suite of core observations, and a new remotely operated vehicle (ROV) coming on-line, the ACO can support new and innovative science studies, in their own right as well as to complement HOT and other Station ALOHA science. Science questions include: How much carbon is exported to pelagic depths, the benthos and the sediment? What governs nutrient injection events into the euphotic zone, and export events to the deeper sea? What are the coupled biological and physical details and impacts of mixing throughout the water column? What are the biological and physical energetics in the abyssal ocean? How well are infra-gravity wave models performing? How do marine mammal populations and behaviors change over time? Can passive acoustics be used to infer ocean temperature? What can we learn about tsunamis and seismic events from the bottom pressure? Addressing such challenging questions will require technology advances such as distributed bottom arrays and water column profiling moorings. This grant supports continued ACO operations and maintenance for the scientific community. Core instrumentation will be repaired, deployed, and maintained, including a second basic sensor package (pressure, fluorometer, and temperature/salinity). All data, including real time video and audio streams, are publically available. The ACO, the deepest operating cabled ocean observatory on our planet at 4728 m water depth, provides the infrastructure for new and exciting, globally relevant science and technology at ALOHA.

长期海洋监测站位于夏威夷瓦胡岛以北100公里处，被称为ALOHA站（长期少营养化生境评估站），自20世纪80年代末以来一直是反复观测的地点。最近，在ALOHA站附近建立了一个用电缆连接到岸上的深海观测站。ALOHA电缆天文台（ACO）于2011年6月部署，支持ALOHA站的创新科学研究。ACO为海洋科学界提供了必要的基础设施和在ALOHA站进行持续科学研究的途径，ALOHA站是一个代表全球海洋很大一部分的贫营养（“沙漠”）站点。作为世界上最深的操作电缆站，它使新型海洋观测传感器和技术的科学开发、测试和操作成为可能，从深渊一直延伸到海面。ALOHA是一个可以从上到下连接海洋的地方，无论是字面上还是比喻上，都可以提高理解，这样我们就可以在所有时间和空间尺度上模拟和预测人类影响的生物地球化学和物理过程。在过去的27年里，夏威夷海洋时间序列（HOT）项目一直在收集基于船舶的海洋数据；在过去的11年里，伍兹霍尔海洋研究所（WHOI）的HOT站点（WHOTS）系泊提供了全面的气象和上层海洋数据。这些数据与来自许多相关过程研究的数据一起，形成了一个以一个地点为中心的独特的、多元的、长期的海洋状态数据集。具有相对较高的功率（1200w），数据带宽（100mb /s）和精确定时(1 ？Ýs)，核心观测的基本套件，以及即将上线的新型远程操作车辆（ROV）， ACO可以支持新的和创新的科学研究，以其自身的权利，以及补充HOT和其他站ALOHA科学。科学问题包括：有多少碳被输出到深海、底栖生物和沉积物中？是什么决定了营养物注入到光带和输出到深海的事件？在整个水柱中混合的耦合生物和物理细节和影响是什么？深海中的生物和物理能量学是什么？次引力波模型的表现如何？海洋哺乳动物的数量和行为是如何随时间变化的？被动声学可以用来推断海洋温度吗？我们能从海底压力中了解到海啸和地震事件的什么信息？解决这些具有挑战性的问题需要先进的技术，如分布式底部阵列和水柱剖面系泊。这笔拨款用于支持科学界持续的ACO操作和维护。核心仪器将进行维修、部署和维护，包括第二个基本传感器包（压力、荧光计和温度/盐度）。所有数据，包括实时视频和音频流，都是公开的。ACO是地球上最深的电缆海洋观测站，水深4728米，为ALOHA提供了新的、令人兴奋的、全球相关的科学和技术基础设施。