Collaborative Research: Eddy Correlation and chamber measurements of benthic oxygen fluxes in permeable sediments

合作研究：可渗透沉积物中底栖氧通量的涡流相关和室测量

• 批准号: 1061110
• 负责人: Markus Huettel
• 金额: $ 34.34万
• 依托单位: Florida State University
• 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: 2011-03-15 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1061110&HistoricalAwards=false
• 关键词: Collaborative; Research; Eddy; Correlation; chamber

The project will investigate the measurement of oxygen flux across the sediment water interface using the eddy correlation technique, which is an in situ approach for continuous measurement. Obtaining such fluxes will increase the ability to measure accurately benthic oxygen fluxes in sediments. This project will further the development of the eddy correlation technique and compare these results with advection chambers and with the perfusion method, both of which are currently used, to validate the eddy correlation approach and show its broad applicability. A process-based mathematical model will also be developed and used, with the flux measurements and porewater data, to validate the technique and will also be used to interpret and synthesize the results. The scientific merit of this research is that oxygen fluxes are the main proxy for assessing carbon cycling rates in sediments and are used widely in carbon budget estimates. The project will therefore help improve such estimates by increasing the database on oxygen fluxes for permeable shelf sediments, and by providing an increased understanding of the controlling variables.The project will develop an outreach program in conjunction with the Virginia Coast Reserve LTER, one of the locations of this project, which has an active outreach program to K-12 schools, with a strong impact on minority groups. The project will also involve graduate and undergraduate education.

该项目将研究使用涡流相关技术测量沉积物-水界面的氧通量，这是一种现场连续测量方法。获得这种通量将提高准确测量沉积物中底栖氧通量的能力。本项目将进一步发展涡流相关技术，并将这些结果与目前使用的平流室和灌注方法进行比较，以验证涡流相关方法并显示其广泛的适用性。还将开发和使用一个基于过程的数学模型，以及通量测量和孔隙水数据，以验证该技术，并将用于解释和综合结果。这项研究的科学价值在于，氧通量是评估沉积物中碳循环速率的主要替代指标，并广泛用于碳收支估算。因此，该项目将有助于改善这种估计，通过增加数据库上的氧通量渗透性陆架沉积物，并通过提供一个更好的理解控制variables.The项目将开发一个外展计划与弗吉尼亚州海岸保护区LTER，该项目的位置之一，其中有一个积极的外展计划，以K-12学校，具有强烈的影响，少数群体。该项目还将涉及研究生和本科生教育。