Model output of the Greenland Ice Sheet to interglacial climate forcing: MIS 5e versus MIS 11

The Greenland Ice Sheet (GrIS) is thought to have contributed substantially to high global sea levels during the interglacials of Marine Isotope Stage (MIS) 5e and 11. Geological evidence suggests that the mass loss of the GrIS was greater during the peak interglacial of MIS 11 than MIS 5e, despite a weaker boreal summer insolation. We address this conundrum by using the three-dimensional thermomechanical ice-sheet model Glimmer forced by CCSM3 climate model output for MIS 5e and MIS 11 interglacial time slices. Our results suggest a stronger sensitivity of the GrIS to MIS 11 climate forcing than to MIS 5e forcing. Besides stronger greenhouse gas radiative forcing, the greater MIS 11 GrIS mass loss relative to MIS 5e is attributed to a larger oceanic heat transport towards high latitudes by a stronger Atlantic meridional overturning circulation. […]

格陵兰冰盖（GrIS）被认为在海洋同位素阶段（MIS）5e和11的间冰期对全球海平面上升做出了显著贡献。地质证据表明，尽管北半球夏季日照较弱，格陵兰冰盖在MIS 11间冰期的峰值阶段相对于MIS 5e阶段的冰量损失更大。我们通过运用三维热力学冰盖模型Glimmer，并使用CCSM3气候模型输出的MIS 5e和MIS 11间冰期时间切片数据来解决这个问题。我们的研究结果表明，格陵兰冰盖对MIS 11气候强迫的敏感性要强于对MIS 5e强迫的敏感性。除了更强的温室气体辐射强迫外，MIS 11格陵兰冰盖相对于MIS 5e的更大冰量损失归因于更强的北大西洋经向翻转环流将更多的海洋热量输送到高纬度地区。