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: 1061364
• 负责人: Peter Berg
• 金额: $ 55.3万
• 依托单位: University of Virginia Main Campus
• 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=1061364&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.

该项目将使用涡流相关技术研究氧气通量跨沉积物水界面的测量，这是一种进行连续测量的原位方法。获得此类通量将增加测量沉积物中准确的底栖氧通量的能力。该项目将进一步开发涡流相关技术，并将这些结果与对流室和灌注方法进行比较，目前都使用两者，以验证涡流相关方法并显示其广泛的适用性。还将开发和使用基于过程的数学模型，并使用通量测量和孔隙水数据来验证该技术，并将用于解释和合成结果。这项研究的科学优点是氧通量是评估沉积物中碳循环速率的主要代理，并在碳预算估计中广泛使用。因此，该项目将通过增加可渗透货架沉积物的氧气通量数据库，并通过提供对控制变量的了解来帮助改善此类估计。该项目将与Virginia Coast Reserve Lerter一起制定外展计划，这是其中之一该项目的地点对K-12学校有积极的外展计划，对少数群体产生了强烈影响。该项目还将涉及研究生和本科教育。