Oceanic Uptake of Carbon Dioxide and its Transport via the South Atlantic Ventilation

二氧化碳的海洋吸收及其通过南大西洋通风的运输

• 批准号: 8613322
• 负责人: Taro Takahashi
• 金额: $ 70.65万
• 依托单位: Columbia University Lamont Doherty Earth Observatory
• 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=8613322&HistoricalAwards=false
• 关键词: Oceanic; Uptake; Carbon; Dioxide; its

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 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 improving our understanding of the dynamic transport of CO2 by Antarctic water masses formed in zones of different climates. Previous investigations showed that a prominent circumpolar CO2 sink zone is located in a latitudinal range of 40 degrees S - 50 degrees S, and that it is closely associated with the zone of confluence of the warm Subtropical water with the cold Subantarctic water. This zone accounts for about 40% of the global oceanic uptake flux for CO2. The low pCO2 values in the surface water of this zone are attributed mainly to the effect of cooling of the warm Subtropical gyre waters and to the mixing of the cooled water with the high-pCO. and high-nutrient Antarctic waters. Photosynthetic utilization of CO2 further reduces the surface water pCO2 value. In the vicinity of this confluence zone, an effective overturning of the water column down to about 500 meters is induced mainly by cooling of the high-salinity Subtropical waters. This process would transport the CO2 taken up by the surface water of this CO2 sink zone into the South Atlantic thermocline. One of the major objectives of the proposed investigation is to estimate the rate of this transport using the tracer and CO2 data obtained during the experiment.

在大西洋测量瞬时示踪剂的两次活动 海洋（TTO/NAS和TTO/赤道）由NSF资助， 从1980年到1985年。 用于建模的完整数据库 这一海洋盆地将包括一项南大西洋研究，以便： 1.确定CO2传输及其对世界的影响 气候， 2.在这一地区主要洋流的约束模型， 和 3.确认观察到的添加量增加5倍 新碳进入温跃层的速率。 这项研究的八个组成部分将由以下人员进行： 来自LDGO，普林斯顿，华盛顿大学， Whoi和SIO。 这些科学家的记录是良好的 通过成功完成以前的研究， 赤道和北大西洋。 他们将提供物理和 化学专业知识，将直接向合作 努力实现地球化学研究的目标。 这一部分的目的是提高我们对 年形成的南极水团对CO2的动态输送 不同气候的地区。 此前的调查显示， 一个突出的环极CO2汇区位于纬度 范围为40度S - 50度S，并且它接近 与暖亚热带 水与寒冷的Subanaertic水。该区域占 约占全球海洋二氧化碳吸收通量的40%。 低 该区域地表水的pCO 2值归因于 主要是受暖副热带环流冷却的影响 沃茨以及冷却水与高pCO的混合。 和高营养的南极沃茨。 光合利用 CO2进一步降低了地表水的pCO 2值。 在 在这个汇合区附近， 水柱下降到约500米，主要是由 冷却高盐度的亚热带沃茨。 这个过程 会把地表水吸收的二氧化碳 南大西洋温跃层的下沉区。 的一个主要 拟议调查的目的是估计 使用在此期间获得的示踪剂和CO2数据， 本实验