Collaborative Research: A Parameterization of Near-Shore Ocean Chemical Dynamics for Global Ocean Circulation/Carbon Cycle Models

合作研究：全球海洋环流/碳循环模型的近岸海洋化学动力学参数化

• 批准号: 0327181
• 负责人: David Archer
• 金额: --
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0327181&HistoricalAwards=false
• 关键词: Collaborative; Research; Parameterization; Near; Shore

ABSTRACTOCE-0327181 / OCE-0327120On this project, researchers at the University of Chicago and the University of New Hampshire will develop a parameterization of the shallow water carbon cycle for inclusion into global-scale ocean carbon cycle models (henceforth referred to as GCMs). GCMs are, by necessity, too coarsely gridded to resolve the physics and biochemistry of shallow waters and therefore suffer in their treatment of processes like the burial of organic carbon, denitrification, and CaCO3 compensation. As a result, they fail to incorporate the effect of the ocean margins on the global ocean carbon cycle and climate. Numerous regional studies have examined the role of the continental shelves in the export of carbon, iron, and as a sink for nitrogen. It therefore seems timely, to synthesize the data from such field studies, examine the sensitivity of sediment-water fluxes and across-shelf biogeochemical transport to various parameters, and build a parameterization that will capture the contribution of the ocean margins in the global ocean carbon cycle over glacial-interglacial time scales. As a first step, this project will focus on building such a parameterization based on two regions that have been extensively studied, but differ in their characteristics: The eastern US continental shelf and the western US coasts of Oregon and California. It will act in response to parameters like the width and depth of continental shelves, changes in wind stress and open ocean circulation, and continental runoff, while using the Muds model to estimate the sediment-water fluxes. The sensitivity of coastal biogeochemical fluxes to these parameters will be tested with a high resolution coastal ocean circulation model configured to these sites, before generalizing to other regions. The parameterization will then be coupled to a GCM at every coastal grid point, providing the chemical fluxes to and from coastal waters and sediments. The full model (GCM + coastal submodel) will be used to assess the effect of shallow waters on the carbon cycle over glacial cycles while responding to glacial / interglacial sea level change. It will also be used to make future assessments of the shallow water CaCO3 dissolution response to fossil fuel CO2.

Abstractoce-0327181 / OCE-0327120ON这个项目，芝加哥大学和新罕布什尔大学的研究人员将开发出浅水碳循环的参数化，以将其纳入全球规模的海洋碳循环模型（Henceforth称为GCMS）。 GCM的必然是太粗大了，无法解决浅水的物理和生物化学，因此在处理诸如埋葬有机碳，硝基化和CACO3补偿之类的过程中受苦。结果，他们无法纳入海洋边缘对全球海洋碳循环和气候的影响。许多区域研究研究了大陆架子在碳，铁和氮的水槽中的出口中的作用。因此，似乎及时地综合了此类现场研究的数据，检查沉积物 - 水通量和跨架子生物地球化学传输到各种参数的敏感性，并构建一个参数化，以捕获全球海洋碳循环在冰川相互作用时间尺度上的海洋边缘的贡献。作为第一步，该项目将集中于基于经过广泛研究但特征不同的两个地区建立这种参数化：美国东部大陆架和俄勒冈州和加利福尼亚州的美国西部海岸。它将响应于诸如大陆架子的宽度和深度，风应力和开放海洋循环以及大陆径流等参数，同时使用泥浆模型来估计沉积物 - 水通量。沿海生物地球化学通量对这些参数的敏感性将通过高分辨率沿海循环模型进行测试，然后再概括到其他地区。然后，参数化将耦合到每个沿海网格点的GCM，从而提供沿沿海水域和沉积物的化学通量。完整的模型（GCM +沿海子模型）将用于评估浅水对冰川周期的影响，同时响应冰川 /冰川间海平面变化。它也将用于对化石燃料二氧化碳的浅水CACO3溶解反应进行以后的评估。