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SIMULATION OF ABRUPT CLIMATE CHANGE INDUCED BY FRESHWATER INPUT TO THE NORTH ATLANTIC OCEAN

机译：淡水输入北大西洋引起的剧烈气候变化的模拟

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TEMPERATURE records from Greenland ice cores(1,2) suggest that large and abrupt changes of North Atlantic climate occurred frequently during both glacial and postglacial periods; one example is the Younger Dryas cold event. Broecker(3) speculated that these changes result from rapid changes in the thermohaline circulation of the Atlantic Ocean, which were caused by the release of large amounts of melt water from continental ice sheets. Here we describe an attempt to explore this intriguing phenomenon using a coupled ocean-atmosphere model. In response to a massive surface flux of fresh water to the northern North Atlantic of the model, the thermohaline circulation weakens abruptly, intensifies and weakens again, followed by a gradual recovery, generating episodes that resemble the abrupt changes of the ocean-atmosphere system recorded in ice and deep-sea cores(4). The associated change of surface air temperature is particularly large in the northern North Atlantic Ocean and its neighbourhood, but is relatively small in the rest of the world. [References: 21]
机译：格陵兰岛冰芯的温度记录（1,2）表明，在冰川期和冰川期后，北大西洋气候经常发生大而突然的变化。一个例子是Younger Dryas寒冷事件。 Broecker（3）推测，这些变化是由于大西洋热盐环流的快速变化引起的，这是由于大陆冰原中释放出大量的融化水而引起的。在这里，我们描述了一种尝试使用耦合的海洋-大气模型探索这一有趣现象的尝试。响应于模型北大西洋北部大量的淡水通量，热盐环流突然减弱，增强并再次减弱，随后逐渐恢复，产生类似于记录的海洋-大气系统突然变化的事件在冰和深海岩心中（4）。在北大西洋北部及其附近，地表温度的相关变化特别大，而在世界其他地区，地表温度的变化相对较小。 [参考：21]

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