Rapid rise of sea level 19,000 years ago and its global implications
Rapid rise of sea level 19,000 years ago and its global implications
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DOI：
10.1126/science.1094449
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发表时间：
2004-05-21
期刊：
影响因子：
56.9
通讯作者：
Weaver, AJ
中科院分区：
文献类型：
--
作者：
Clark, PU;McCabe, AM;Weaver, AJ
来自爱尔兰海盆地的证据支持海平面在距今19000年(B.P.)之前的突然上升(融水脉冲)的存在。气候记录表明，此时北大西洋深水形成和伴随而来的北大西洋冷却的强度大幅下降，这表明来自一个或多个北半球冰盖的融水脉冲的来源。热带大西洋、太平洋和南半球的变暖也始于19000年前。这些反应确定了在北半球保持寒冷气候的同时，向南半球和热带传播去冰川气候信号的机制。
Evidence from the Irish Sea basin supports the existence of an abrupt rise in sea level ( meltwater pulse) at 19,000 years before the present ( B. P.). Climate records indicate a large reduction in the strength of North Atlantic Deep Water formation and attendant cooling of the North Atlantic at this time, indicating a source of the meltwater pulse from one or more Northern Hemisphere ice sheets. Warming of the tropical Atlantic and Pacific oceans and the Southern Hemisphere also began at 19,000 years B. P. These responses identify mechanisms responsible for the propagation of deglacial climate signals to the Southern Hemisphere and tropics while maintaining a cold climate in the Northern Hemisphere.