Collaborative Research: Modeling coastal oxygen production and carbon sequestration

合作研究：模拟沿海氧气生产和碳封存

• 批准号: 1128889
• 负责人: Thomas Ackerman
• 金额: $ 2.79万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-11-01 至 2016-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1128889&HistoricalAwards=false
• 关键词: Collaborative; Research; Modeling; coastal; oxygen

A numerical modeling study of ocean circulation and biogeochemical oxygen and carbon dynamics in an upwelling coastal margin will be conducted. Model simulations combined with chemical and physical observations along the Oregon coast will provide new insights into coastal ocean circulation and biogeochemistry, with particular focus on the processes that govern cross-shelf exchange, and the factors that lead to hypoxia and enhanced ocean acidification.Intellectual merit: The proposed research will address critical unresolved scientific issues in physical and biogeochemical coastal ocean processes. The cycles of oxygen and carbon in coastal waters are globally significant, and locally determine conditions of hypoxia and ocean acidification, but neither is well understood. High-resolution circulation modeling has progressed sufficiently to provide a useful context in which to explore these biogeochemical dynamics. At the same time, physical circulation models are far from perfect, and the coupled physical-biogeochemical simulations proposed here will provide a framework in which to explore the combined system uncertainties that arise from poorly known or represented physical parameters and processes, and to identify the areas in which improvements to the representation of the physical circulation will be essential to future advances in understanding the coupled system. The proposed research will specifically focus on modeling the conditions of the Oregon shelf during the upwelling seasons of 2001, 2006 and 2009, for which high-quality biogeochemical and physical data are available, and which have demonstrated extreme low oxygen, high CO2 conditions. For 2001, the physical circulation has been well modeled in previous work, providing a starting point for the coupled modeling. For 2006 and 2009, the physical circulation modeling will be novel, providing a new comparison with physical data and an opportunity to explore basic inter-annual variability in the shelf circulation. A novel, simplified biogeochemical module containing one nutrient, two particle classes, and dissolved oxygen has been formulated and will be implemented in the circulation model. Simulations will include idealized explorations of the behavior of the biogeochemical module and the coupled system, and realistic cases based on best-estimate physical circulation simulations for 2001, 2006 and 2009. In all of these simulations, the choice of the highly simplified biogeochemical module is intended to facilitate the multiple simulations and parameter-value choices, in order to explore sensitivities and characterize regimes.Broader impact: This project addresses fundamental scientific issues involving both the high-human-impact coastal zone and the role of coastal processes in the global biogeochemical balances associated with climate change. As part of his training, a postdoctoral investigator will develop a broad background spanning both physical and chemical coastal oceanography, and be prepared to formulate and address cutting-edge science questions in the critical area of coastal physical-biogeochemical interactions. The proposal will also provide partial support to a second female postdoctoral investigator, through collaboration with UW/JISAO that will develop and encourage inter-institutional as well as interdisciplinary research collaboration. Results of the proposed research will be disseminated through publications in peer-reviewed research journals and presentations at national and international scientific meetings, and through continuation and extension of existing outreach and general education activities. The proposed research is relevant to the coastal component of the NSF Ocean Observatories Initiative.

将进行海洋环流以及上升流沿海边缘的生物地球化学氧和碳动力学的数值模拟研究。模型模拟与俄勒冈州海岸的化学和物理观测相结合，将为沿海海洋环流和生物地球化学提供新的见解，特别关注控制跨陆架交换的过程，以及导致缺氧和增强海洋酸化的因素。 ：拟议的研究将解决物理和生物地球化学沿海海洋过程中尚未解决的关键科学问题。沿海水域的氧和碳循环在全球范围内具有重要意义，并决定局部缺氧和海洋酸化的条件，但这两者都未被充分了解。高分辨率环流建模已经取得了足够的进展，为探索这些生物地球化学动力学提供了有用的背景。与此同时，物理循环模型远非完美，这里提出的耦合物理-生物地球化学模拟将提供一个框架，在其中探索由鲜为人知或代表性的物理参数和过程引起的组合系统不确定性，并识别在这些领域中，改进物理循环的表示对于未来理解耦合系统的进展至关重要。拟议的研究将特别侧重于对 2001 年、2006 年和 2009 年上升流季节期间俄勒冈陆架的状况进行建模，可以获得高质量的生物地球化学和物理数据，并且已经证明了极端低氧、高二氧化碳的条件。 2001 年，物理循环在之前的工作中已经得到了很好的建模，为耦合建模提供了一个起点。 2006年和2009年，物理循环模型将是新颖的，提供与物理数据的新比较，并有机会探索陆架循环的基本年际变化。一种新颖、简化的生物地球化学模块包含一种营养物、两种颗粒类别和溶解氧，现已制定并将在循环模型中实施。模拟将包括对生物地球化学模块和耦合系统行为的理想化探索，以及基于 2001 年、2006 年和 2009 年最佳估计物理循环模拟的现实案例。在所有这些模拟中，高度简化的生物地球化学模块的选择是旨在促进多种模拟和参数值选择，以探索敏感性并表征政权。更广泛的影响：该项目解决了涉及高人类影响沿海区以及沿海过程在与气候变化相关的全球生物地球化学平衡中的作用。作为培训的一部分，博士后研究员将发展涵盖物理和化学沿海海洋学的广泛背景，并准备好制定和解决沿海物理-生物地球化学相互作用关键领域的前沿科学问题。该提案还将通过与威斯康星大学/JISAO 合作，为第二名女性博士后研究员提供部分支持，这将发展和鼓励机构间以及跨学科的研究合作。拟议研究的结果将通过同行评审的研究期刊上的出版物和在国家和国际科学会议上的演讲以及通过继续和扩展现有的外展和普通教育活动来传播。拟议的研究与 NSF 海洋观测站计划的沿海部分相关。