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

基本信息

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

项目摘要

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.

海底热液喷口是深海海底生物活动的热点，但我们对物理、化学和生物系统如何结合在一起以产生如此高的生产力知之甚少。这项研究源自 Ridge 2000 博士后奖学金，是首批应用反应输运模型来评估热液喷口流体化学、化学合成微生物代谢过程、流体流动和矿物沉淀之间相互作用的研究之一。该建模项目提供了独特的定量基础，可用于测试相互作用机制的假设、衡量系统对控制参数变化的敏感性以及识别大型和小型过程之间的联系。模型预测将与美国西北部近海胡安德富卡海岭奋进段热液喷口场的数据和观测结果进行比较。计算将使用成熟的TOUGH REACT建模代码和独立开发的更大规模建模代码。输入参数将来自可用的热力学数据库和来自测量各种热液喷口微生物对化学物质的生物吸收率的实验的新动力学数据。这项工作的更广泛影响包括对博士后研究员的跨学科培训，他们将在佐治亚大学和哈佛大学的实验室进行交叉培训。博士后还将从事培训和指导本科生等活动。