Dissolved Gaseous Tracers in the South Atlantic Ventilation Experiment: Chlorofluoromethanes

南大西洋通风实验中溶解的气体示踪剂：氯氟甲烷

• 批准号: 8613321
• 负责人: Ray Weiss
• 金额: $ 58.43万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8613321&HistoricalAwards=false
• 关键词: Dissolved; Gaseous; Tracers; South; Atlantic

Two campaigns to measure transient tracers in the Atlantic Ocean (TTO/NAS and TTO/Equatorial) were funded by NSF during the period from 1980 to 1985. A complete data base for modelling this ocean basin would include a South Atlantic Study to: 1.Determine CO2 transports and their influence on world climate, 2.Constrain models of major ocean currents in this area, and 3.Confirm an observed 5-fold increase in the addition rate of new carbon to the thermocline. Eight components of such a study (SAVE) will be performed by investigators from LDGO, Princeton, University of Washington, WHOI, and SIO. The track record of these scientists is well established by successful completion of previous studies in the Equatorial and North Atlantic. They will provide physical and chemical expertise which will be directed toward a cooperative effort to reach the goals of the geochemical study. This component is aimed at using dissolved gaseous tracers to determine rates of thermocline ventilation, rates and pathways of spreading Antarctic Intermediate Water, rates and paths of Deep and Bottom Water spreading, and rates of cross-equatorial exchange. From a knowledge of the extent of equilibration of dissolved gases in the formation area with the atmosphere, the spreading rates can be determined from a simple box model.

1980年至1985年期间，国家科学基金会资助了两项测量大西洋瞬时示踪剂的运动(TTO/NAS和TTO/赤道)。一个完整的海洋盆地模拟数据库将包括一项南大西洋研究，以：1.确定二氧化碳输送及其对世界气候的影响；2.该地区主要洋流的约束模型；3.确认温跃层中新碳的添加速度增加了5倍。这项研究的八个组成部分(SAVE)将由来自LDGO、普林斯顿、华盛顿大学、WHOI和SIO的研究人员进行。这些科学家在赤道和北大西洋成功地完成了以前的研究，这为他们奠定了良好的记录。他们将提供物理和化学专业知识，这些专业知识将被用于合作努力，以实现地球化学研究的目标。这一部分的目的是利用溶解气体示踪剂确定温跃层通风率、南极中间水扩散速率和路径、深水和底层水扩散速率和路径以及跨赤道交换率。根据地层中溶解气体与大气的平衡程度的知识，可以从简单的盒子模型确定扩散速率。