The causes of symmetrical changes in climate between the Northern and Southern Hemisphere are poorly understood. A geological reconstruction of Patagonian glacial extent reveals that changes in Pacific-wide atmospheric circulation (linked to variations in Earth’s orbit and teleconnections between hemispheres) may have led to nearly synchronous global ice sheet evolution.

中文翻译：

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巴塔哥尼亚冰川历史的重建为全球气候的关键驱动因素提供了信息

人们对北半球和南半球气候对称变化的原因知之甚少。巴塔哥尼亚冰川范围的地质重建表明，整个太平洋大气环流的变化（与地球轨道的变化和半球之间的遥相关有关）可能导致了几乎同步的全球冰盖演化。