据悉，南格陵兰岛周围的沿海环流将来自北极和格陵兰冰盖的新鲜浮力水团，输送到伊尔明格海和拉布拉多海附近的对流、下沉和深水形成区域。
课题组人员通过在东南格陵兰大陆架上的东格陵兰海岸流中初始化合成颗粒，并在1993年至2021年期间通过测高仪得出的表面流来追踪这些淡水团的路径和命运。研究人员报告说，大部分的水（83%）仍然在格陵兰岛南端的大陆架上。
在季节和年际时间尺度上，剩余颗粒的陆架-盆地交换的变化与尖端射流事件的数量密切相关。在尖端喷射事件中，粒子离开冰架的概率几乎增加了五倍。这些结果表明，尖端射流的数量是格陵兰岛南部陆架-盆地交换的一个密切代表。
附：英文原文
Title: Extreme wind events responsible for an outsized role in shelf-basin exchange around the southern tip of Greenland
Author: Arthur Coquereau, Nicholas P. Foukal, Kjetil Vge
Issue&Volume: 2024-11-15
Abstract: 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.
DOI: adp9266
Source: https://www.science.org/doi/10.1126/sciadv.adp9266