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中文摘要：
末次冰消期,巨量的冰盖从大陆和海面上消融,导致全球平均海平面上升120-140m.从地质记录中至少识别出3次规模巨大的冰盖快速融化和冰融水倾泻事件,按照发生时间先后,分别被命名为19ka-MWP,MWP-1A和MWP-1B事件,其中备受关注的MWP-1A事件发生在-14.2-13.7kaBP.然而,对MWP-1A事件的确切发生时间和冰融水的来源问题争议很大,传统理论认为北大西洋淡水注入事件会引发温盐环流强度减弱,甚至完全关闭,因此争论的焦点在于建立合理的冰融水事件与气候突变的相互关系.本文中总结了各类地质记录与模拟结果,发现重大的冰融水事件并没有导致气候的大幅度变冷,重要的气候反转期与大规模的冰融水倾泻事件之间并不一定存在因果关系.末次冰消期的冰融水事件只是微弱地影响了大洋温盐环流的强度,未来的研究需要重新评价淡水对气候系统的反馈作用.
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