Synchrony of Rapid Climatic Changes in the East Asian Monsoon Area and the North Atlantic Region

摘要

Teleconnections between the East Asian Monsoon and North Atlantic circulation are being clarified through Japanese Quaternary studies affiliated with an interna- tional program on global changes. Monsoonal history is well known from loess and intercalated soils in China. Recent findings where, of what kind show that the summer monsoon became stronger soon sfter Heinrich events of the North Atlantic region. Conversely, the winter monsoon strengthened, as shown by eolian dust in Japanese peal, during cold phases probably correlative with Heinrich events. Heinrich events and Dansgaard-Oeschger cycles have been further correlated with changes of surface temperature of the Japan and South China Seas, as inferred from cores from those waters. Current hypotheses include a linkage between monsoons and a summertime subtropical jet near the Tibetan Plateau.