Collaborative Research: Modeling coastal oxygen production and carbon sequestration

将对上升流海岸边缘的海洋环流和海洋地球化学氧和碳动力学进行数值模拟研究。模型模拟结合化学和物理观测沿着俄勒冈州海岸将提供沿海海洋环流和海洋地球化学的新见解，特别关注的过程，管理跨大陆架交换，以及导致缺氧和海洋酸化增强的因素。智力价值：拟议的研究将解决物理和海洋地球化学沿海海洋过程中关键的未解决的科学问题。沿海沃茨中的氧和碳循环具有全球意义，并在当地决定缺氧和海洋酸化的条件，但两者都没有得到很好的理解。高分辨率环流模拟已经取得了足够的进展，提供了一个有用的背景下，探索这些地球化学动力学。与此同时，物理循环模型是远远不够完美的，耦合物理-地球化学模拟这里提出的将提供一个框架，在其中探索的组合系统的不确定性，所产生的未知或代表性不强的物理参数和过程，并确定在哪些方面的改进，以表示的物理循环将是必不可少的未来的进步，在理解耦合系统。拟议的研究将特别侧重于模拟条件的俄勒冈州货架在上升流季节的2001年，2006年和2009年，高品质的地球化学和物理数据，并已证明极端低氧，高CO2的条件。对于2001年，物理环流已经很好地模拟在以前的工作，耦合模拟提供了一个起点。对于2006年和2009年，物理循环模型将是新颖的，提供了一个新的比较与物理数据和机会，探讨基本的年际变化在货架流通。一种新的，简化的生物地球化学模块包含一种营养物质，两个粒子类，和溶解氧已制定，并将在循环模式中实施。模拟将包括对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为了促进多个模拟和参数值的选择，以探讨敏感性和表征regimes.Broader影响：该项目涉及的基本科学问题，涉及高人为影响的沿海地区和沿海过程在全球生物地球化学平衡与气候变化的作用。作为他的培训的一部分，博士后研究员将开发跨越物理和化学沿海海洋学的广泛背景，并准备制定和解决沿海物理-地球化学相互作用的关键领域的前沿科学问题。该提案还将通过与华盛顿大学/JISAO合作，为第二位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在同行评审的研究期刊上发表文章、在国家和国际科学会议上发表演讲以及继续和扩大现有的外联和普通教育活动来传播。拟议的研究与国家科学基金会海洋观测站倡议的沿海部分有关。

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.