Collaborative Research: Development of an in situ sensor for high-resolution measurements of total dissolved inorganic carbon

合作研究：开发用于高分辨率测量总溶解无机碳的原位传感器

• 批准号: 1029778
• 负责人: Robert Byrne
• 金额: $ 14.43万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1029778&HistoricalAwards=false
• 关键词: Collaborative; Research; Development; situ; sensor

It has become increasingly clear that the impact of anthropogenic CO2 on the global oceans may have severe consequences to a wide variety of organisms and food webs. Reduced pH and carbonate saturation states have been shown to cause reduction in calcification rates in aragonite producing corals and pteropods. Recent investigations indicate that the aragonite saturation horizon in the North Pacific has measurably shoaled in the last two decades. Because the effects of increasing atmospheric CO2 can affect all aquatic systems, studies must be conducted as synoptically as possible. This can be most effectively accomplished through the wide-scale use of in situ sensorsInvestigations into carbon system dynamics are seriously hampered by the inability to measure total dissolved inorganic carbon (CT) in situ. While the capabilities exist to measure pH, CO2 fugacity (f CO2), and pCO2 in situ, such parameters strongly co-vary and therefore carbon system parameters derived from these values are subject to much greater error than those calculated using one of those terms and either total alkalinity (AT) or CT. The proposed work builds on the decade-long development and deployment of the in situ Spectrophotometric Elemental Analysis System (SEAS), as well as the development and field testing of the bench-top MICA (Multiparameter Inorganic Carbon Analyzer). The project will involve development of a total carbon capability on the SEAS platform through modeling, design, and lab tests of a new optical cell; configuring and calibrating SEAS for CT measurements; and field testing/ground truthing in a local harbor.The PI's request funding to: (1) Develop, test, and refine an optical cell that will facilitate measurements of dissolved inorganic carbon (DIC) in situ; (2) conduct a series of laboratory tests to optimize the CT method for use on the SEAS instrument; and (3) conduct field tests using SEAS-CT and SEAS-pH instruments at Bayboro Harbor. While the objective of the proposed work is to develop an in situ instrument capable of performing CT measurements in a moored configuration, equilibration on the scale of two minutes should allow the development of an in situ profiling capability as long as the profiling rate is sufficiently slow.Broader Impacts: To be able to use in situ platforms will enhance the regional and global understanding of relevant environmental issues related to climate (air-sea exchange of CO2 and the ocean's role in the atmospheric uptake) as well as the effect of the increased CO2 in the ocean such as ocean acidification. Good including graduate. The proposed activity will contribute to the advance of knowledge through the mentoring of undergraduate and graduate students, which is clearly effective since the Principal Investigator was herself a graduate student in this group. A minority graduate student involved in the Bridge to the Doctorate program will also participate to the project. The proposal has huge potential for broader community collaboration and the proposers give examples of recent partnerships. This will be of great benefit for society since the fate of anthropogenic carbon can then be better predicted for future scenarios of various CO2 emissions, which will directly influence the decision on climate mitigation strategies.

越来越清楚的是，人为二氧化碳对全球海洋的影响可能会对多种生物和食物网产生严重的影响。 pH值和碳酸盐饱和态的降低已显示导致珊瑚和翼足产生的钙化速率降低。最近的调查表明，在过去的二十年中，北太平洋的后期饱和度范围已易于衡量。由于增加大气二氧化碳的影响会影响所有水生系统，因此必须尽可能地进行研究。通过将原位传感器对碳系统动态进行广泛使用，这可以最有效地实现，这严重阻碍了衡量总溶解的无机碳（CT）的原位。尽管存在可用于测量pH值，二氧化碳（F CO2）和pCO2原位的能力，但这些参数强烈地存在，因此从这些值中得出的碳系统参数的误差要比使用这些术语之一和总碱度（AT）或CT计算的碳系统参数要大得多。拟议的工作建立在十年的长期发展和部署原位分光光学元素分析系统（SEA），以及台式云母云母（多参数无机碳分析仪）的开发和现场测试。该项目将通过建模，设计和实验室测试来开发海洋平台上的总碳能力；为CT测量配置和校准海洋； PI的请求资金：（1）开发，测试和完善一个光单元，该光单元将促进溶解的无机碳（DIC）的测量； （2）进行一系列实验室测试，以优化用于海洋仪器使用的CT方法； （3）使用Bayboro Harbour的海C-CT和海洋仪器进行现场测试。虽然建议的工作的目标是开发能够在系泊配置中执行CT测量的原位仪器，但在两分钟的规模上平衡的平衡应允许开发原位分析能力，只要分析速率足够慢，只要较慢的速度就会降低。Broader的影响。公路的影响：在相关的环境问题上，可以增强相关环境问题的效应（可以增强与环境相关的问题（与全球环境问题）相关的环境问题，以实现质地的环境问题，以实现环境的理解。大气吸收）以及海洋中二氧化碳增加（例如海洋酸化）的影响。很好，包括毕业生。拟议的活动将通过指导本科生和研究生的指导来为知识的发展做出贡献，这显然是有效的，因为首席研究员本人本人是该小组的研究生。参与博士学位课程桥梁的少数族裔研究生也将参加该项目。该提案具有更广泛的社区合作的巨大潜力，建议者提供了最近的合作伙伴关系的例子。这将对社会有很大的好处，因为可以更好地预测人为碳的命运对于各种二氧化碳排放的未来情况，这将直接影响对气候缓解策略的决定。