Papers

Peer-reviewed
May 1, 2018

Changes in detrital input, ventilation and productivity in the central Okhotsk Sea during the marine isotope stage 5e, penultimate interglacial period

Journal of Asian Earth Sciences
  • Francisco J. Jimenez-Espejo
  • ,
  • Antonio García-Alix
  • ,
  • Naomi Harada
  • ,
  • André Bahr
  • ,
  • Saburo Sakai
  • ,
  • Koichi Iijima
  • ,
  • Qing Chang
  • ,
  • Keiko Sato
  • ,
  • Katsuhiko Suzuki
  • ,
  • Naohiko Ohkouchi

Volume
156
Number
First page
189
Last page
200
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1016/j.jseaes.2018.01.032
Publisher
Elsevier Ltd

By presenting benthic foraminifera isotope profiles and bulk geochemical composition of core sediments, we offer a mutiproxy reconstruction of the central Okhotsk Sea oceanography between ∼130 to and ∼115 kyr, related to the marine isotopic stage 5e (MIS 5e). Sediments from the site MR0604-PC7A have been compared with paleo- sea surface temperatures and other records. This multiparameter approach allowed to recognize three periods for MIS 5e evolution, characterized by variations in marine productivity and bottom oxygenation. These variations have been ultimately associated with the production of Okhotsk Sea Intermediate Water and the presence or absence of nutrient contribution from the Pacific Deep Water into central Okhotsk Sea. Aeolian input reconstructed by Th/Sc ratio indicates higher values during the MIS 6 and MIS 5d compared with the MIS 5e. Eu∗ values indicate an input of detrital material from Kurile Islands and East-Kamchatka during the late MIS 5e, absent during the early MIS 5e and glacial periods.

Link information
DOI
https://doi.org/10.1016/j.jseaes.2018.01.032
ID information
  • DOI : 10.1016/j.jseaes.2018.01.032
  • ISSN : 1367-9120
  • SCOPUS ID : 85044764280

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