格陵兰岛北部的冰架迅速解体和减弱
R Millan1, E Jager2, J Mouginot2
1Université Grenoble Alpes, CNRS, IRD, INP, 38400, Grenoble, Isère, France. romain.millan@univ-grenoble-alpes.fr.
Nature communications
|November 7, 2023
概括
北格陵兰岛北部的格陵兰
科学领域:
- 冰川学的冰川学
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
背景情况:
- 北格陵兰的冰川拥有足够的冰,可以使全球海平面上升2.1米.
- 这些冰川以前被认为是稳定的,由剩余的冰架支持.
研究的目的:
- 调查格陵兰北部冰架和冰川最近的变化和稳定性.
- 为了确定海洋变暖对冰架融化和冰川动态的影响.
主要方法:
- 自1978年以来冰架体积变化的分析.
- 在2000年至2020年期间监测基底融化速度和海洋温度.
- 观测冰川接地线的退缩和冰的排放.
主要成果:
- 自1978年以来,格陵兰北部的冰架已经损失了超过35%的体积,其中3个完全崩.
- 由于海洋温度上升而导致的基底融化的增强,主导着剩余的冰架中的质量损失.
- 冰川正在动态响应,表现出退缩的接地线和增加的冰排放.
结论:
- 持续的海洋热强迫可能会维持或增加高基底融率.
- 北格陵兰冰川的稳定性受到威胁,可能导致海平面上升.
- 观察到的变化表明,在这个关键的冰盖区域,可能会从稳定转变为不稳定.
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