Atmospheric Carbon Tetracloride Removal by Soils: Seasonal Flux Variability and Identification of Uptake Mechanisms

土壤对大气四氯化碳的去除：季节性通量变化和吸收机制的识别

• 批准号: 0400429
• 负责人: James Happell
• 金额: --
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0400429&HistoricalAwards=false
• 关键词: Atmospheric; Carbon; Tetracloride; Removal; Soils

There is currently considerable uncertainty in the global budget of carbon tetrachloride, an anthropogenic compound important by virtue of its acute toxicity and impact on global climate (leading to commercial production being restricted by the Montreal Protocol). It is likely that previous source and/or sink estimates for carbon tetrachloride may be in error or at least highly uncertain. This study involves a seasonal program of field measurements of carbon tetrachloride uptake fluxes into soil at a number of climatically diverse surface sites coupled with parallel laboratory studies characterizing biological uptake mechanisms. The project involves collaboration between a university and a federal government laboratory. Results from this study will advance our understanding of the atmospheric budget of carbon tetrachloride by better characterizing the influence of soil dynamics on the sink term of atmospheric in the global carbon tetrachloride budget. Broader impacts of this research include the societal benefit to science through advances in understanding in a highly climate- and policy- relevant issue. Contributions to education include research training and professional development opportunities for a number of students.

目前，四氯化碳的全球预算存在很大的不确定性，四氯化碳是一种重要的人类化合物，因其具有急性毒性和对全球气候的影响（导致商业生产受到《蒙特利尔议定书》的限制）。 以前对四氯化碳的源和/或汇的估计可能有误，或至少是非常不确定。 这项研究涉及到一个季节性的四氯化碳吸收通量到土壤中的实地测量方案，在一些气候多样的表面网站，再加上平行的实验室研究，生物吸收机制的特点。 该项目涉及大学和联邦政府实验室之间的合作。 从这项研究的结果将促进我们的理解大气中的四氯化碳预算更好地表征土壤动力学的影响，大气中的汇项在全球四氯化碳预算。 这项研究的更广泛影响包括通过在高度气候和政策相关问题上的理解进步而对科学产生的社会效益。 对教育的贡献包括为一些学生提供研究培训和专业发展机会。