Beryllium-10 (Be) has been proposed as a potential proxy for investigating ice shelf presence and absence, or meltwater discharge in coastal polar environments. However, the sources and distribution of atmospherically produced meteoric-Be in the Antarctic marine realm are yet to be fully characterized, making any inferences about its concentration in sediments challenging. We present a dataset of Be and Be concentrations, and Be/Be ratios in seafloor surface sediments from the Antarctic continental shelf - including from sub ice shelf cores - to assess the sources and processes contributing Be-isotopes to ice-sheet proximal marine settings. We show that upwelling waters (e.g. Circumpolar Deep Water) are a significant source of Be to continental shelf sediments. This limits the use of Be/Be as a proxy for ice shelf environment or meltwater discharge, but instead provides a potential proxy for reconstructing Circumpolar Deep Water incursions onto Antarctic continental shelves.

中文翻译：

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环极深水上升流是南极大陆架沉积物中 10Be 的主要来源

铍 10 (Be) 已被提议作为调查冰架存在和不存在或沿海极地环境中融水排放的潜在代理。然而，南极海洋领域大气中产生的流星铍的来源和分布尚未完全确定，这使得对其在沉积物中浓度的推断具有挑战性。我们提供了南极大陆架（包括冰架下核心）海底表面沉积物中 Be 和 Be 浓度以及 Be/Be 比率的数据集，以评估 Be 同位素对冰盖近端海洋环境的来源和过程。我们表明，上升流水域（例如环极深水）是大陆架沉积物中 Be 的重要来源。这限制了 Be/Be 作为冰架环境或融水排放的替代指标的使用，但却为重建环极深水入侵南极大陆架提供了潜在的替代指标。