The Quality Control of Oceanic CO2 Measurements: Preparation and Distribution of Reference Materials

海洋二氧化碳测量的质量控制：标准物质的制备和分配

• 批准号: 2050280
• 负责人: Andrew Dickson
• 金额: $ 51.63万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2050280&HistoricalAwards=false
• 关键词: Quality; Control; Oceanic; CO2; Measurements

The goal of this project is to continue to provide a mechanism for the quality control of oceanic carbon dioxide measurements, in particular those that are made as part of international global programs. This will help to ensure that such measurements are comparable and accurate although made in different laboratories at different times. Such measurements are important components of global scale survey cruises such as those of the Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP), as well as playing a significant role in the quality control of ocean acidification measurements. The provision of reference materials to the international community helps to improve the overall quality of oceanic carbon data around the world both for field studies of the distribution of oceanic carbon, as well as for studies related to ocean acidification. It is a significant US contribution to global research infrastructure in this field. Numerous students are involved in, and receive training through, this program. To achieve the goal outlined above, the Scripps laboratory will prepare and certify reference materials for the following parameters of the oceanic carbon dioxide system in seawater: total dissolved inorganic carbon, total alkalinity, and pH. The reference materials for total dissolved inorganic carbon and for total alkalinity will be based on natural seawater, sterilized, bottled, and analyzed using appropriate reference methods for these parameters. Reference materials for pH are based on Tris buffers in synthetic seawater and calibrated using spectrophotometric pH measurements. In addition, the laboratory will distribute calibrated acid titrant for alkalinity measurements. Reference materials will be distributed to US and to international investigators to assist in the quality control of oceanic CO2 measurements. During the three years of this project, the laboratory expects to distribute about 30,000 bottles of reference material. These materials will also be used to provide test samples for use in collaborative studies of the analytical methods used to determine these various parameters.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.

该项目的目的是继续为海洋二氧化碳测量值，尤其是作为国际全球计划的一部分而提供的质量控制机制。这将有助于确保此类测量值可比且准确，尽管在不同时间在不同的实验室进行。这样的测量是全球规模调查巡航（例如全球海洋船舶水文调查计划（GO-SHIP））的重要组成部分，并且在海洋酸化测量的质量控制中发挥了重要作用。向国际社会提供参考材料有助于提高世界各地海洋碳数据的总体质量，既可以涉及海洋碳的分布以及与海洋酸化有关的研究。这是美国对该领域全球研究基础设施的重要贡献。许多学生参与了该计划并接受培训。为了实现上面概述的目标，Scripps实验室将准备并认证海水中海洋二氧化碳系统的以下参数：总溶解的无机碳，总碱度和pH。总溶解的无机碳和总碱度的参考材料将基于天然海水，使用适当的参考方法对这些参数进行灭菌，瓶装和分析。 pH的参考材料基于合成海水中的Tris缓冲液，并使用分光光度法测量值校准。此外，实验室将分布校准的酸滴定剂进行碱度测量。参考材料将分配给我们和国际调查人员，以协助海洋二氧化碳测量值的质量控制。在该项目的三年中，实验室预计将分发约30,000瓶参考材料。这些材料还将用于提供测试样本，以在用于确定这些各种参数的分析方法的协作研究中使用。本奖反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估评估的评估来支持的。

项目成果

Technical note: Interpreting pH changes

• DOI: 10.5194/bg-18-1407-2021
• 发表时间: 2021-02-24
• 期刊: BIOGEOSCIENCES
• 影响因子: 4.9
• 作者: Fassbender, Andrea J.;Orr, James C.;Dickson, Andrew G.
• 通讯作者: Dickson, Andrew G.

Chemical speciation models based upon the Pitzer activity coefficient equations, including the propagation of uncertainties: Artificial seawater from 0 to 45 °C

基于 Pitzer 活度系数方程的化学形态模型，包括不确定性的传播：0 至 45°C 的人造海水

• DOI: 10.1016/j.marchem.2022.104095
• 发表时间: 2022
• 期刊: Marine Chemistry
• 影响因子: 3
• 作者: Humphreys, Matthew P.;Waters, Jason F.;Turner, David R.;Dickson, Andrew G.;Clegg, Simon L.
• 通讯作者: Clegg, Simon L.

Chemical speciation models based upon the Pitzer activity coefficient equations, including the propagation of uncertainties. II. Tris buffers in artificial seawater at 25 °C, and an assessment of the seawater ‘Total’ pH scale

基于 Pitzer 活度系数方程的化学形态模型，包括不确定性的传播。

• DOI: 10.1016/j.marchem.2022.104096
• 发表时间: 2022
• 期刊: Marine Chemistry
• 影响因子: 3
• 作者: Clegg, Simon L.;Humphreys, Matthew P.;Waters, Jason F.;Turner, David R.;Dickson, Andrew G.
• 通讯作者: Dickson, Andrew G.