Paleoceanography for future prediction : a possibility of climate mode jump with global warming

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Changes in behaviors of East Asian monsoons and westerly jet axis since the last interglacial period were reconstructed using piston cores retrieved from the NW Pacific, and their relation with millennial-scale climatic changes in the North Atlantic were examined. The results suggest that changes in the position of westerly jet played a role of linking changes in East Asian monsoons with climatic changes in the Northern Atlantic. The results further suggest that the phase relation between changes in the North Atlantic climate and East Asian monsoons reversed between the last glacial and the Holocene. Ventilation rate of North Pacific Intermediate Water also varied in association with these changes during the last glacial period. The results of the last interglacial reconstruction further suggest that westerly jet axis and East Asian monsoon front may shift northward in response to the global warming.