格陵兰岛的海洋终结冰川的沉积物排放与表面融化有关
Camilla S Andresen1, Nanna B Karlsson2, Fiammetta Straneo3
1Geological Survey of Denmark and Greenland, Department of Glaciology and Climate, Øster Voldgade 10, 1350, Copenhagen K, Denmark. csa@geus.dk.
Nature communications
|February 13, 2024
概括
格陵兰冰盖沉积物流量估计为1.324 Gt yr-1 (2010-2020) 来自海洋终结冰川,影响海洋生态系统和海底息地.
科学领域:
- 地球科学 地球科学 地球科学
- 冰川学的冰川学
- 海洋学 海洋学 海洋学
背景情况:
- 格陵兰冰盖的沉积物排放对海洋生态系统和海底息地至关重要.
- 现有的沉积物流量估计是有限的,主要是使用陆地终结冰川的数据.
研究的目的:
- 通过包括海洋终结冰川来解决沉积物流量估计的差距.
- 为格陵兰的峡湾制定一个全面的沉积物预算.
主要方法:
- 来自九个冰川峡湾的沉积物核心的分析,以评估自1950年以来的空间沉积.
- 确定质量积累率与峡湾下游的距离之间的相关性,并通过表面流水正常化.
- 使用海洋终结出口冰川的融化数据计算年度沉积物流量.
主要成果:
- 据估计,在2010-2020年期间,从海洋终结冰川到峡湾的总年沉积物流量为1.324 +/- 0.79 Gt yr-1.
- 在正常化质量积累率和峡湾距离之间发现了显著的相关性.
- 根据冰川融化数据,开发了一种方法来计算任何峡湾点的沉积物流量.
结论:
- 该研究提供了包括海洋终结冰川在内的首个全面的沉积物预算.
- 这些发现对于了解基底冰盖状况和预测生态系统变化至关重要.
- 由于冰盖融化而增加的沉积物排放将对格陵兰岛的海洋环境产生重大影响.
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