Collection of Tritium/Helium Samples from the Amundsen and Bellinghausen Seas

9412910施洛瑟拟议的工作是收集和分析1994年初纳撒尼尔·帕尔默号皇家海洋研究所前往阿蒙森海和贝灵豪森海的海洋巡航中的氚和氦的海水样本。过去，这一地区的样本很少，对该地区的海洋过程知之甚少。这次巡航的具体目的是调查大尺度海洋学特征，研究表层混合层和跃层的演变与海冰覆盖和下伏的中深水团的关系，确定南极坡锋的位置，并调查温暖的绕极水流入大陆架的影响。氚在确定大陆架水向深海盆地渗透的速度方面特别有用，而氦与氧同位素结合在一起，是冰架底部融化产生的水的独特示踪剂。拟议的工作补充了巡航的这些目标，因为氚和氦的物理和化学特性是众所周知的，并且非常适合研究地下水团的形成和水循环。对海洋中痕量元素分布的了解扩大了直接观测的时间和空间尺度，并允许对超出巡航直接限制的海洋过程进行推断。***

9412910 Schlosser The proposed work is the collection and analysis of seawater samples for tritium and helium on an oceanographic cruise of the RVIB Nathaniel B. Palmer to the Amundsen and Bellingshausen Seas in early 1994. This region has been sparsely sampled in the past, and little is known about the regional oceanographic processes. The specific objectives of this cruise are to investigate the large-scale oceanographic features, study the evolution of the surface mixed layer and pycnocline in relation to the sea ice cover and the underlying intermediate and deep water masses, determine the location of the Antarctic Slope Front, and to investigate the impact of warm circumpolar water flowing onto the continental shelf. Tritium is particularly useful in determining the rate of penetration of continental shelf waters into deep oceanic basins, while helium, in combination with oxygen isotopes, is a unique tracer for water derived from the basal melting of ice shelves. The proposed work complements these objectives of the cruise, since the physical and chemical characteristics of tritium and helium are well known and well suited for the investigation of subsurface water mass formation and water circulation. Knowledge of the distribution of trace elements in the ocean broadens the time and space scales of the direct observations, and allows inferences about oceanic processes that go beyond the immediate limits of the cruise. ***