Yamamoto, Masanobu (2009): Response of the North Pacific to orbital forcing during late Quaternary from the view of paleotemperature records. Palaeontological Society of Japan, [Tokyo], Japan, Kaseki = Fossils, 86, 45-58, georefid:2012-083045
Abstract:
We present a palaeoceanographic perspective of the North Pacific during the last two glacial cycles based on U (super K') (sub 37) -derived palaeotemperature records from Japan and California margins. At the Japan margin, the sea surface temperature (SST) in the Kuroshio-Oyashio transition has varied in response to precessional cycle. At the California margin, SST has varied in response to ice volume changes, but the SST difference between inshore and offshore sites (Delta SST (sub northeastern Pacific (NEP)) = SST (sub ODP1014) -SST (sub ODP1016) ) has responded to precessional cycle. Comparison of Delta SST (sub NEP) and the SST (sub MD01-2421) of the central Japan margin revealed anti-phase variation; high Delta SST (sub NEP) (indicating weakening of the California Current) corresponded to low SST at the Japan margin (indicating the southward displacement of the northwestern Pacific subarctic boundary and weakening of the Kuroshio Extension), and vice versa. This finding suggests that the intensity of the North Pacific subtropical gyre circulation has varied in response to precessional forcing.
Coverage:
West: -122.1635 East: -119.5853 North: 34.3220 South: 32.5002
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