Citations:Middle Ages


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- Very broadly and diffusely, the end of a global classical antiquity was shaped in some measure by a climatic global Dark Age running from roughly AD 400 to AD 900. This reversal was coherent in many parts of the world, but it did not have the reach and consequences of the two Hallstatt minimum/Siberian High epochs that bracketed both classical antiquity and the Middle Ages. Rather than a strong Siberian High at work, these climatic Dark Ages were marked in a cold northern hemisphere by a round of North Atlantic ice rafting, and by ENSO variation in the Pacific tilting toward the El Niño mode, with erratic floods and droughts along the Andean coast.