South Atlantic Ventilation Study (SAVE) Ra-228, Nutrient, O2and Hydrographic Data Analysis

该提案旨在绘制南大西洋盆地Ra-228的分布，以升级环流模型并预测通风的变化。将收集大约1500个样品，测定Ra-228/Ra-226比率和Ra-226值，以便从这些分析的产物中获得准确的Ra-228测量值。为了解决盆地中部地区的低浓度梯度，需要高采样密度要求。只有一部分样本集分析将得到支持，直到需要更详细的证明。1980 - 1985年期间，美国国家科学基金会资助了两项大西洋瞬态示踪剂测量运动（TTO/NAS和TTO/赤道）。建立这一海洋盆地模型的完整数据库将包括一项南大西洋研究，以便：2.确定CO2运输及其对世界气候的影响；2 .限制该地区主要洋流的模式；确认已观测到的向温跃层添加新碳的速率增加了5倍。这项研究（SAVE）的八个组成部分将由来自LDGO、普林斯顿大学、华盛顿大学、WHOI和SIO的研究人员进行。这些科学家成功地完成了以前在赤道和北大西洋的研究，从而建立了良好的记录。它们将提供物理和化学专门知识，这些专门知识将用于合作努力，以实现地球化学研究的目标。

This proposal is aimed at mapping the Ra-228 distributions in the South Atlantic basin to upgrade circulation models and predict changes in ventilation. Approximately 1500 samples will be collected for Ra-228/Ra-226 ratios and Ra-226 values to obtain an accurate measure of Ra-228 from the product of these analyses. High sampling density requirements are required to resolve the low concentration gradients found in mid-basin areas. Only a portion of the sample set analyses will be supported until the need for greater detail is justified. 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.