Koizumi, Itaru and Yamamoto, Hirofumi (2011): Oceanographic variations over the last 150,000 yr in the Japan Sea and synchronous Holocene with the Northern Hemisphere

Leg/Site/Hole:
ODP 127
ODP 127 797
Identifier:
2011-078983
georefid

10.1016/j.jseaes.2010.06.013
doi

Creator:
Koizumi, Itaru
Hokkaido University, Japan
author

Yamamoto, Hirofumi
Institute of Earth Environment, China
author

Identification:
Oceanographic variations over the last 150,000 yr in the Japan Sea and synchronous Holocene with the Northern Hemisphere
2011
In: Chen, Min-Te (editor), Sun Youbin (editor), An Zhisheng (editor), Quaternary paleoclimate of the western Pacific and east Asia; state of the art and new discovery
Elsevier, Oxford, United Kingdom
40
6
1203-1213
The paleo-hydrography in the Japan Sea called a "mini-Ocean" was reconstructed based on the high-resolution analysis of diatom assemblages over the period of 150,000 yr. The decrease of diatom fertilization in the Japan Sea, when it was isolated from surrounding seas due to the drop of sea-level during the glacial to stadial phase, resulted in dissolution and/or extremely low diatom production in the northern cores in the subarctic water-masses. The annual Td'-derived paleo-SSTs ( degrees C) were controlled by the fluctuations of 2-kyr and 4-kyr periods at intervals of 20 kyr and 40 kyr over the last 160 kyr BP, respectively. A 23-kyr cycle is recognized during the periods from 140 ka to 100 ka, according to the Wavelet analysis. After temperature and sea-level increased both at 133-128 ka, 60-53 ka and 15-10 ka, oceanic warm-water diatom species predominated at 127-119 ka and after 9 cal ka in the interstadial phase. At 21.3-16.9 ka and 12.9-9.8 ka, sea-level and salinity increased as the transgression developed. At 10.0-7.0 ka, the oceanic association shifted from cold-water species in the stadial period to warm-water ones in the interstadial phase. The fluctuations of Td' derived-SSTs ( degrees C) on century to millennial time-scales during the Holocene are well correlated with abrupt climatic events that different paleoclimatic proxies record in many regions of the Northern Hemisphere. Abstract Copyright (2011) Elsevier, B.V.
English
Serial
Coverage:Geographic coordinates:
North:38.3657
West:134.3209East: 134.3211
South:38.3655

Quaternary geology; absolute age; accelerator mass spectra; algae; assemblages; C-14; carbon; Cenozoic; currents; dates; diatoms; geochemistry; Holocene; isotope ratios; isotopes; Japan Sea; Leg 127; mass spectra; microfossils; North Pacific; Northern Hemisphere; Northwest Pacific; O-18/O-16; ocean currents; Ocean Drilling Program; ODP Site 797; Oki Ridge; oxygen; Pacific Ocean; paleo-oceanography; paleoclimatology; paleoenvironment; paleotemperature; Plantae; Pleistocene; Quaternary; radioactive isotopes; sea-level changes; sea-surface temperature; spectra; stable isotopes; upper Pleistocene; upper Weichselian; variations; Weichselian; West Pacific; Yamato Basin; Younger Dryas;

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