Ocean Acidification-Category 1: Does the strength of the carbonate pump change with ocean stratification and acidification and how?

海洋酸化-类别 1：碳酸盐泵的强度是否会随着海洋分层和酸化而变化？如何变化？

• 批准号: 1040957
• 负责人: Jorge Sarmiento
• 金额: $ 49.32万
• 依托单位: Princeton University
• 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: 2010-11-01 至 2014-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1040957&HistoricalAwards=false
• 关键词: Ocean; Acidification; Category; Does; strength

This project will improve the ability to predict the response of the carbonate pump to ocean acidification and stratification through enhanced understanding of the controlling factors of the export of CaCO3 from the surface and cycling through the water column and sediments. Key questions to be addressed are (i) Does the strength of the carbonate pump change in response to ocean acidification and stratification? (ii) Is the CaCO3 export more closely associated with the tightly recycling picoplankton and nanoplankton ecosystems than the blooming microplankton? (iii) What is the role of interactions between organic particle fluxes and the saturation state of seawater with respect to CaCO3 minerals in the dissolution of CaCO3 in the water column and sediments? The above three questions will be addressed in a unified model-observation framework where a suite of global models of the carbonate pump will be objectively assessed using a wide range of observations. An already assembled and analyzed global database of ocean biogeochemical tracers and sediment traps will be combined with 3-D numerical model frameworks. The work will be done using a time-efficient solver that allows for systematic model optimization and sensitivity analyses. This work will be incorporated into earth system models developed by the NOAA Geophysical Fluid Dynamics Laboratory for assessment of the interactive role of marine ecosystems and ocean acidification in future climate. This work will further help to improve our ability to predict the future role of the ocean in absorbing anthropogenic carbon and also elucidate the oceanic contribution to the glacial/interglacial changes in atmospheric pCO2. This diagnostic study as well as the model sensitivity analyses will benefit the ocean observing system by providing guidance on how to better monitor the ocean's response to ocean acidification and stratification. Results will be made available via Princeton University websites, and will be incorporated in the teaching material at Princeton University.

该项目将通过加强对 CaCO3 从地表输出以及在水体和沉积物中循环的控制因素的了解，提高预测碳酸盐泵对海洋酸化和分层的响应的能力。 要解决的关键问题是（i）碳酸盐泵的强度是否会因海洋酸化和分层而变化？ (ii) CaCO3 出口与紧密循环的超微型浮游生物和微型浮游生物生态系统的关系是否比与繁盛的微型浮游生物的关系更密切？ (iii) 有机颗粒通量和海水中 CaCO3 矿物的饱和状态之间的相互作用对于 CaCO3 在水柱和沉积物中的溶解有何作用？ 上述三个问题将在统一的模型观测框架中得到解决，在该框架中，将使用广泛的观测来客观评估一套碳酸盐泵的全球模型。 已经组装和分析的海洋生物地球化学示踪剂和沉积物捕集器全球数据库将与 3D 数值模型框架相结合。这项工作将使用省时的求解器来完成，该求解器可以进行系统的模型优化和敏感性分析。 这项工作将被纳入 NOAA 地球物理流体动力学实验室开发的地球系统模型中，用于评估海洋生态系统和海洋酸化在未来气候中的相互作用。 这项工作将进一步有助于提高我们预测海洋在吸收人为碳方面未来作用的能力，并阐明海洋对大气 pCO2 冰期/间冰期变化的贡献。 这项诊断研究以及模型敏感性分析将为如何更好地监测海洋对海洋酸化和分层的响应提供指导，从而使海洋观测系统受益。结果将通过普林斯顿大学网站公布，并将纳入普林斯顿大学的教材中。