Terrestrial - Ocean environmental change in the northwestern Pacific from the glacial times to Holocene

Hodaka Kawahata, Hideaki Ohshima, Azumi Kuroyanagi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The Mixed Water Region (MWR) between the Oyashio Current and the Kuroshio Extension and surrounding terrestrial region have been affected by the global climatic change. The sedimentary core KR02-15 PC6 collected at 40°23.8871'N, 143°29.8663'E in the MWR provides detailed records of pollen and spores and alkenone sea surface temperature (SST) during the last 15 kyr, showing that both ocean and terrestrial environments have been appreciably linked. Abundance of Picea, a proxy for terrestrial cool climate, fluctuated, coinciding with the alkenone-SST change during the interstadial period (15.0-7.7. cal kyr B.P.). Alkenone-SST increased to the modern level at 8.0. cal kyr B.P. and remained almost constant until 2.0 kyr B.P. while the terrestrial warming still continued until 4.0. cal kyr B.P. The rainfall under terrestrial warm condition increased gradually from 7.9. cal kyr B.P. and rapidly from 2.0. cal kyr B.P. Both terrestrial and marine environments cooled down during the last 2 kyr possibly due to the intensified cold Oyashio Current.

Original languageEnglish
Pages (from-to)1189-1202
Number of pages14
JournalJournal of Asian Earth Sciences
Volume40
Issue number6
DOIs
Publication statusPublished - 2011 Apr 2
Externally publishedYes

Keywords

  • Alkenone
  • Climate
  • Late Pleistocene
  • Mid-latitude
  • North Pacific
  • Pollen

ASJC Scopus subject areas

  • Geology
  • Earth-Surface Processes

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