卡尔森及其同事重建了最后冰河时代末的冰盖融化事件,他们选取了当时覆盖大部分北美地区的劳伦泰(Laurentide)冰盖作为原型,模拟在温暖世界中的冰原是如何快速消融的,又如何导致海平面上升的。
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It was the midcontinental corridor between two massive ice sheets—the Laurentide to the west—that enabled the southward migration.
正是两块巨大的冰原之间的半大陆性质的通道——西面的劳伦斯泰德冰原——使人们向南迁移成为可能。
It was this midcontinental corridor between two massive ice sheets—the Laurentide to the east and the Cordilleran to the west—that enabled the southward migration.
正是这条位于两块巨大冰原之间的大陆中部走廊——东部是月桂树冰原,西部是科迪勒兰冰原——促成了向南的迁移。
The Laurentide ice sheet retreated and left mass amounts of water in the basins the glacier had carved thus making the great lakes.
劳伦·泰德冰盖退却,在冰川雕刻的盆地里留下大量的水,从而形成大湖。
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