OCE-PRF: What controls the fate of biogenic particulate carbon in the ocean's twilight zone? Global-scale insights from data-constrained models

OCE-PRF：什么控制着海洋暮色区生物颗粒碳的命运？

• 批准号: 2126514
• 负责人: Ashley Dinauer
• 金额: $ 37.76万
• 依托单位: Woods Hole Oceanographic Institution
• 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: 2021-12-01 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2126514&HistoricalAwards=false
• 关键词: OCE; PRF; What; controls; fate

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2).This fellowship project will address two fundamental questions about the ocean’s carbon cycle: (1) what controls the efficiency of particulate organic carbon (POC) transfer through the mesopelagic zone (100–1000 m), and (2) what causes shallow water column (1000 m depth) calcium carbonate (CaCO3) dissolution? Our ability to assess the impact of climate change on the ocean-atmosphere carbon dioxide (CO2) balance requires a predictive understanding of vertical POC transport, whereas a mechanistic understanding of shallow-water CaCO3 dissolution is needed to better predict the future state of ocean acidification. These two key issues will be addressed in the proposed project via the development of predictive, usable models that include the main physical and biogeochemical processes thought to control the vertical penetration of biogenic POC and CaCO3 into the ocean interior. All models and model output resulting from the proposed activity will be made available to any investigator who wishes to work with them through BCO-DMO. The publicly available models will allow the ocean biogeochemistry community to investigate how oceanic carbon sequestration will change in response to climate change.The overarching goal of the proposed project is to incorporate the effects of biogenic particle transport, transformation and removal processes into a mechanistic modeling framework that is suitable for implementation in Earth System models of intermediate complexity. The focus of model development will be on the treatment of unresolved processes including zooplankton-mediated particle breakup. The synergistic approach combines prognostic ocean biogeochemical models, data-constrained ocean circulation inverse models, and new sources of observational data to provide both the conceptual frameworks for model formulations and the model formulations themselves. POC flux and POC concentration profiles derived from field data, biogeochemical observations made available by the Biogeochemical Argo program, ocean carbon data from the Global Ocean Ship-Based Hydrographic Investigations Program, and Global Ocean Data Analysis Project and World Ocean Atlas data products will provide essential constraints on the underlying particle dynamics of the mesopelagic zone. The models resulting from the proposed activity can be applied to important scientific questions such as understanding oceanic carbon sequestration in a changing climate.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.

该奖项全部或部分由2021年美国救援计划法案资助（公法117-2）。该奖学金项目将解决有关海洋碳循环的两个基本问题：（1）是什么控制着颗粒有机碳（POC）通过中层的转移效率（100-1000 m），（2）是什么原因导致浅水柱（1000 m深度）碳酸钙（CaCO 3）溶解？我们评估气候变化对海洋-大气二氧化碳（CO2）平衡的影响的能力需要对POC垂直传输的预测性理解，而对浅水CaCO 3溶解的机理性理解则需要更好地预测海洋酸化的未来状态。这两个关键问题将在拟议的项目中通过开发预测性的可用模型来解决，这些模型包括被认为控制生物源POC和CaCO 3垂直渗透到海洋内部的主要物理和生物地球化学过程。拟议活动产生的所有模型和模型输出将提供给任何希望通过BCO-DMO与其合作的研究人员。公开提供的模型将使海洋生物地球化学界调查海洋碳固存将如何变化，以应对气候变化。拟议项目的总体目标是将生物颗粒的运输，转化和去除过程的影响纳入一个机械建模框架，适用于中等复杂性的地球系统模型的实施。模型开发的重点将是对未解决的过程，包括zoophetton介导的颗粒破碎的治疗。协同方法结合了预测海洋生物地球化学模型、数据约束海洋环流逆模型和新的观测数据来源，为模型制定和模型制定本身提供概念框架。从实地数据、生物地球化学Argo方案提供的海洋地球化学观测、全球海洋船基水文调查方案提供的海洋碳数据以及全球海洋数据分析项目和世界海洋地图集数据产品得出的POC通量和POC浓度分布图，将对中层区的底层颗粒动态提供重要的制约。从拟议的活动中产生的模型可以应用于重要的科学问题，如了解海洋碳封存在不断变化的气候。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。