什么是“海洋冰崖失稳”（MICI）机制？
What is the 'marine ice cliff instability' (MICI) mechanism?
当冰架退却、裸露的冰崖过高时，冰体因自身重力可能崩塌，暴露更内侧冰崖，形成自持退化，理论上可在百年尺度大幅抬升海平面。其触发阈值仍有争议。
When ice shelves retreat and expose overly tall ice cliffs, the ice can collapse under its own weight, exposing further cliffs and self-sustaining retreat—potentially raising seas substantially over centuries. Trigger thresholds remain debated.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-04结论有争议 · Contested
来源 · Source
DeConto 与 Pollard（2016）《Nature》；国际思韦茨冰川合作计划（ITGC）
DeConto and Pollard (2016), Nature; International Thwaites Glacier Collaboration
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1038/nature17145（复合著录按段核验：本标识只担保第一段 DeCo
#冰盖 #失稳 #海平面
格陵兰和南极冰盖融化会怎样影响海平面？
How do Greenland and Antarctic ice-sheet melt affect sea level?
冰盖陆地冰入海直接增加海水体积；此外质量损失改变重力与地壳回弹，使海平面分布不均。二者是当前海平面上升的主因之一。
Land ice entering the ocean directly adds volume; mass loss also shifts gravity and crustal rebound, making sea-level rise uneven. Both are leading causes of current rise.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#冰盖 #海平面 #南极
如果南极冰融化，海边的城市会怎样？
If Antarctic ice melts, what happens to coastal cities?
海水会变多、海平面上升，低洼的沿海城市更容易被淹、涨潮时更频繁进水。
More water means higher seas; low-lying coastal cities flood more easily and get seawater in more often at high tide.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#冰盖 #海平面 #科普