Ridge 2000 Postdoctoral Fellowship Program: Reactive Transport Modeling of Biogeochemical Processes in a Hydrothermal Vent Field

Ridge 2000 博士后奖学金计划：热液喷口场生物地球化学过程的反应输运模型

• 批准号: 1039431
• 负责人: Christof Meile
• 金额: $ 16.66万
• 依托单位: University of Georgia Research Foundation Inc
• 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: 2010-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1039431&HistoricalAwards=false
• 关键词: Ridge; 2000; Postdoctoral; Fellowship; Program

Seafloor hydrothermal vents are hotspots of biological activity on the deep seafloor, yet we know little about how the physical, chemical, and biological systems are tied together in order to yield such high productivity. This research, originates as a Ridge 2000 Postdoctoral Fellowship and is one of the first studies to apply reactive transport modeling to evaluate the interplay between hydrothermal vent fluid chemistry, chemosynthetic microbial metabolic processes, fluid flow, and mineral precipitation. This modeling project provides a unique and quantitative foundation that can be used to test hypotheses for mechanisms of interaction, gauging the sensitivity of the system to changes in governing parameters, and identifying linkages between large and small scale processes. Model predictions will be compared with data and observations from the well-characterized hydrothermal vent fields of the Endeavour Segment of the Juan de Fuca Ridge offshore of the northwestern US. The well established TOUGH REACT modeling code and independently developed larger scale modeling codes will be used for the calculations. Input parameters will come from available thermodynamic data bases and new kinetic data from experiments that measure the biological uptake rates of chemical species by various hydrothermal vent micro-organisms. Broader impacts of the work include interdisciplinary training of a postdoctoral researcher who will cross train in laboratories at the University of Georgia and Harvard University. The postdoc will also engage in training and mentoring undergraduate students, among other activities.

海底水热通风孔是深处海底生物活性的热点，但我们对物理，化学和生物系统如何将其捆绑在一起以产生如此高的生产率而了解。 这项研究起源于脊2000博士后研究金，是最早采用反应性传输建模的研究之一，以评估水热通风液化学，化学合成微生物代谢过程，流体流量和矿物沉淀之间的相互作用。该建模项目提供了一个独特而定量的基础，可用于测试假设的交互作用机制，测量系统对管理参数变化的敏感性，并识别大型和小规模过程之间的联系。 模型预测将与来自美国西北部Juan de Fuca Ridge的努力段的良好表征水热场的数据和观察结果进行比较。良好建立的艰难的反应建模代码和独立开发的大规模建模代码将用于计算。输入参数将来自可用的热力学数据库和来自实验的新动力学数据，这些实验测量了各种热液通风微生物的化学物种生物学摄取速率。 这项工作的更广泛的影响包括对博士后研究人员的跨学科培训，该研究人员将在佐治亚大学和哈佛大学的实验室穿越火车。 博士后还将从事培训和指导本科生以及其他活动。