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GLACIAL CLIMATE INSTABILITY IN THE NORTHEAST PACIFIC OCEAN

机译：东北太平洋的冰川气候不稳定

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RECENT climate records from Greenland ice cores(1,2) and North Atlantic sediments(3-5) have challenged the long-held notion that Pleistocene climate fluctuates between two relatively stable states (glacials and interglacials). It has been appreciated for some time that the transitions from one state to another are not smooth(6), but the new records indicate that the glacial and interglacial periods themselves appear to be punctuated by significant climate variability-several short interstadial events punctuated the last glacial period, for example. But it has not been clear whether this climate instability is a global phenomenon or is peculiar to the North Atlantic region. Here we present climate proxy records from sediment cores from the eastern margin of the North Pacific Ocean, which indicate that climate in this region was also highly unstable during the last glaciation. Our observations suggest that glacial climate instability throughout the Northern Hemisphere might be linked to rapid changes in the size of the Laurentide ice sheet and associated changes in atmospheric circulation. [References: 31]
机译：格陵兰岛冰芯（1,2）和北大西洋沉积物（3-5）的最新气候记录挑战了长期以来的观念，即更新世气候在两个相对稳定的状态（冰川和冰川间）之间波动。一段时间以来人们已经意识到，从一种状态到另一种状态的过渡并不顺利（6），但是新记录表明，冰川期和冰川间期本身似乎被重大的气候变化所打断-几次短暂的间期事件在最后一次被打断。例如，冰川期。但是，目前尚不清楚这种气候不稳定是全球现象还是北大西洋地区特有的现象。在这里，我们提供了来自北太平洋东缘沉积物核心的气候代用记录，这表明该地区的气候在最后一次冰期期间也高度不稳定。我们的观察结果表明，整个北半球的冰川气候不稳定可能与Laurentide冰盖大小的快速变化以及大气环流的相关变化有关。 [参考：31]

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