After being locked in the jaws of peak glacial cold for ten or so thousand years, a Heinrich event jarred the system, initiating the transition back toward interglacial conditions (Heinrich, 1988). Surprisingly, while this impetus occurred in the North Atlantic, the first indications that a thaw was underway appeared in the south. As recorded in Antarctic ice, starting 17.5 ka (thousand years) ago, the air temperature commenced a steady climb that continued for 3 ka (i.e. until 14.5 ka ago), bringing the temperature about halfway back to its interglacial level (Augustin et al., 2004). At...

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