Organic molecular and carbon isotopic records of the Japan Sea over the past 30 kyr

R. Ishiwatari, K. Yamada, K. Matsumoto, M. Houtatsu, H. Naraoka

研究成果: ジャーナルへの寄稿記事

47 引用 (Scopus)

抄録

The organic and isotopic geochemical study of two sediment cores (KH-79-3, L-3, and KH-79-3, C-3) from the Oki Ridge in the Japan Sea has revealed that total organic carbon (TOC) mass accumulation rates are extremely high in the 12-11 ka (calendar age) interval and TOC in the sections in the 24-17 ka interval is depleted in 13C by 3.5‰ relative to Holocene sediments. Alkenone sea surface temperature (SST) shows a decrease from 18°to 14°C from 17.5 to 11.6 ka and a sharp increase from 14°to 19°C from 11.6 to 11.1 ka. The SST changes are associated with the inflow of cold seawater with the vertical water mixing and the inflow of warm Tsushima Current into the Japan Sea. The δ13C values for both 24-methylcholesta-5,22-dien-3β-ol (diatom marker) and dinosterol (dinoflagellate marker), are at their minimum from 24 to 17 ka, while those for long-chain alkenones are not. The theoretical considerations on δ13C for biomarkers suggest low photosynthetic carbon demand of diatoms and dinoflagellates from 24 to 17 ka.

元の言語英語
ページ(範囲)260-270
ページ数11
ジャーナルPaleoceanography
14
発行部数2
DOI
出版物ステータス出版済み - 4 1 1999
外部発表Yes

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alkenone
dinoflagellate
total organic carbon
inflow
diatom
sea surface temperature
carbon
accumulation rate
sediment core
biomarker
Holocene
seawater
sediment
water
sea
marker
demand
cold

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Palaeontology

これを引用

Organic molecular and carbon isotopic records of the Japan Sea over the past 30 kyr. / Ishiwatari, R.; Yamada, K.; Matsumoto, K.; Houtatsu, M.; Naraoka, H.

:: Paleoceanography, 巻 14, 番号 2, 01.04.1999, p. 260-270.

研究成果: ジャーナルへの寄稿記事

Ishiwatari, R. ; Yamada, K. ; Matsumoto, K. ; Houtatsu, M. ; Naraoka, H. / Organic molecular and carbon isotopic records of the Japan Sea over the past 30 kyr. :: Paleoceanography. 1999 ; 巻 14, 番号 2. pp. 260-270.
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