Collaborative Research: Accelerated Development of New, Scalable pH Sensors for Global Ocean Observational Networks

合作研究：加速开发用于全球海洋观测网络的新型可扩展 pH 传感器

• 批准号: 2300401
• 负责人: Stephen Riser
• 金额: $ 31.34万
• 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: 2023-02-15 至 2026-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2300401&HistoricalAwards=false
• 关键词: Collaborative; Research; Accelerated; Development; New

The DuraFET pH sensor is a key component of global observation networks through coordinated efforts such as Biogeochemical Argo and the Global Ocean Acidification Observation Network. These pH sensors have been deployed on hundreds of autonomous profiling floats, underwater gliders, and moorings to study ocean carbon cycling in environments ranging from the intertidal zone, coral reefs, to the open ocean. Additionally, they are commonly utilized in laboratory mesocosms to study impacts of ocean acidification. The key enabling technology for the DuraFET is an Ion Sensitive Field Effect Transistor (ISFET) semiconductor chip, manufactured by Honeywell Co. The Honeywell ISFET has several unique features that give it superior performance relative to its competitors. This in essence results in a sole-source for DuraFET pH sensors, and represents a key vulnerability for ocean carbon monitoring. To address this, this proposal aims to accelerate the development of alternative pH sensors that can be scaled to fit the current needs of global ocean observational networks.Specifically, this project will test and develop two promising pH sensor candidates that are capable of long-term deployments (years) to 2 km depth on autonomous platforms such as profiling floats and gliders, as well as for moored instrumentation and laboratory mesocosm applications. First, the performance of a commercially available optical pH optode sensor (distributed by PyroScience) will be assessed. This is a relatively new sensor for oceanography, thus its performance has not been thoroughly characterized to the satisfaction of chemical oceanographers. Second, a pH sensor that utilizes an ISFET from a different supplier will be developed. Both pH sensors that will be explored are solid state, small, and low-power, making them good candidates for autonomous platforms. The sensors will be thoroughly characterized in the laboratory for pH response, long term drift, salinity, temperature, and pressure effects, response time, and hysteresis. Both sensors will then be deployed on coastal moorings, underwater gliders, and profiling floats to assess in situ performance across a range of conditions over months to years. Results from this development will be rapidly and efficiently shared with the oceanographic community through recurring webinars, publications, and collaboration with industry.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.

Durafet pH传感器是通过生物地球化学ARGO和全球海洋酸化观测网络等协调的努力的全球观察网络的关键组成部分。这些pH传感器已部署在数百个自动分析的浮子，水下滑翔机和系泊设备上，以研究从潮间带（珊瑚礁）到开放海洋的环境中的海洋碳循环。此外，它们通常在实验室中cos中用于研究海洋酸化的影响。 Durafet的关键启用技术是由Hon​​eywell Co制造的离子敏感场效应晶体管（ISFET）半导体芯片。HoneywellISFET具有几个独特的功能，相对于竞争对手提供了卓越的性能。从本质上讲，这导致了Durafet pH传感器的唯一源，并且代表了海洋碳监测的关键脆弱性。为了解决这个问题，该建议旨在加快可以扩展可以扩展的替代性pH传感器，以适应全球海洋观察网络的当前需求。特别是，该项目将测试和开发两个有希望的PH传感器候选者，这些pH传感器候选能够长期部署（年）在2 km的自治平台上进行2 km的自治平台上的自主仪，例如分析的浮动和浮雕仪器，以及MORES的MORES和MORED MORED MORERED MORERED MORERED MORERED MORERED MORERED MORED MORDISATION。首先，将评估商用光学pH值传感器的性能（由Pyroscience分布）。这是一个相对较新的海洋传感器，因此其性能尚未被彻底表征化学海洋学家的满意度。其次，将开发利用来自其他供应商的ISFET的pH传感器。将探索的两个pH传感器都是固态，小和低功率，使其成为自主平台的良好候选者。传感器将在实验室中充分表征pH响应，长期漂移，盐度，温度和压力效应，响应时间和磁滞。然后，这两个传感器都将部署在沿海系泊，水下滑翔机和分析浮子上，以评估数月至数年的一系列条件的原位性能。通过重复的网络研讨会，出版物和与行业的合作，该开发的结果将迅速有效地与海洋社区共享。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的影响评估标准的评估来获得支持的。