Yamamoto, Masanobu (2009): Response of the North Pacific to orbital forcing during late Quaternary from the view of paleotemperature records

Leg/Site/Hole:
ODP 167
ODP 167 1014
ODP 167 1016
Identifier:
2012-083045
georefid
Creator:
Yamamoto, Masanobu
Hokkaido University, Faculty of Environmental Earth Science, Sapporo, Japan
author
Identification:
Response of the North Pacific to orbital forcing during late Quaternary from the view of paleotemperature records
2009
Kaseki = Fossils
Palaeontological Society of Japan, [Tokyo], Japan
86
45-58
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.
Japanese
Serial
Coverage:Geographic coordinates:
North:34.3220
West:-122.1635East: -119.5853
South:32.5002
Quaternary geology; algae; alkenones; Cenozoic; Coccolithophoraceae; currents; East Pacific; Emiliania; Emiliania huxleyi; Geophyrocapsa oceanica; glacial environment; interglacial environment; ketones; Kuroshio; Leg 167; microfossils; North Pacific; Northeast Pacific; ocean currents; Ocean Drilling Program; ODP Site 1014; ODP Site 1016; organic compounds; Pacific Ocean; paleo-oceanography; paleotemperature; Plantae; Quaternary; sea-surface temperature; SEM data; subtropical environment; temperature; upper Quaternary;
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