Michael Sarnthein, Thorsten Kiefer, Pieter M. Grootes, Henry Elderfield, Helmut Erlenkeuser; Warmings in the far northwestern Pacific promoted pre-Clovis immigration to America during Heinrich event 1. Geology ; 34 (3): 141–144. doi: https://doi.org/10.1130/G22200.1
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Well-dated multidecadal- to centennial-scale sediment records from the subarctic northwest Pacific show that the early deglacial 18.5–15.0 ka was marked by 3 pronounced short-term warmings of ∼5 °C. They lasted 500–1500 yr each and were coeval with early to late stages of cold Heinrich event 1 in the North Atlantic. These regional climate windows may have promoted a pre-Clovis emigration of people from the cold-arid monsoon climate in East Asia to the climatically more favorable, then-emerged Beringian and Aleutian shelf regions and the Americas, as suggested by archeological findings.