The coastal circulation around Southern Greenland transports fresh, buoyant water masses from the Arctic and Greenland Ice Sheet near regions of convection, sinking, and deep-water formation in the Irminger and Labrador Seas. Here, we track the pathways and fate of these fresh water masses by initializing synthetic particles in the East Greenland Coastal Current on the Southeast Greenland shelf and running them through altimetry-derived surface currents from 1993 to 2021. We report that the majority of waters (83%) remain on the shelf around the southern tip of Greenland. Variability in the shelf-basin exchange of the remaining particles closely follows the number of tip jet wind events on seasonal and interannual timescales. The probability of a particle exiting the shelf increases almost fivefold during a tip jet event. These results indicate that the number of tip jets is a close proxy of the shelf-basin exchange around Southern Greenland.

中文翻译：

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极端风事件在格陵兰岛南端的大陆架-盆地交换中发挥了巨大作用


格陵兰岛南部周围的沿海环流从北极和格陵兰冰盖输送新鲜的浮力水团，靠近伊尔明格海和拉布拉多海的对流、下沉和深水形成区域。在这里，我们通过在东南格陵兰大陆架上的东格陵兰沿海洋流中初始化合成颗粒，并在 1993 年至 2021 年期间通过测高得出的表面洋流运行它们来追踪这些淡水团的路径和归宿。我们报告说，大多数水域 （83%） 仍然位于格陵兰岛南端周围的大陆架上。剩余颗粒的大陆架-盆地交换的变化与季节和年际时间尺度上的尖端急流事件的数量密切相关。在尖端喷射事件期间，颗粒离开架子的概率几乎增加了五倍。这些结果表明，尖端射流的数量与格陵兰岛南部周围的大陆架-盆地交换密切相关。