Ishiwatari, Ryoshi; Yamada, Keita; Houtatsu, M; Naraoka, Hiroshi (1999): (Table 1) Bulk geochemistry of sediment cores KH-79-3_L3 and KH-79-3_C3 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856814, Supplement to: Ishiwatari, R et al. (1999): Organic molecular and carbon isotopic records of the Japan Sea over the past 30 kyr. Paleoceanography, 14(2), 260-270, https://doi.org/10.1029/1998PA900014
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Abstract:
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 per mil 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 inflowof warm Tsushima Current into the Japan Sea. The d13C values for both 24-methylcholesta-5,22-dien-3?-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 d13C for biomarkers suggest low photosynthetic carbon demand of diatoms and dinoflagellates from 24 to 17 ka.
Related to:
Ishiwatari, Ryoshi; Hirakawa, Y; Uzaki, M; Yamada, Keita; Yada, T (1994): Organic geochemistry of the Japan Sea sediments-1: Bulk organic matter and hydrocarbon analyses of core KH-79-3, C-3 from the Oki Ridge for paleoenvironment assessments. Journal of Oceanography, 50(2), 179-195, https://doi.org/10.1007/BF02253478
Oba, Tadamichi; Murayama, Masafumi; Matsumoto, Eiji; Nakamura, Toshio (1995): AMS-14C Ages of Japan Sea Cores from the Oki Ridge. Quaternary Research-Tokyo, 34(4), 289-296, https://doi.org/10.4116/jaqua.34.4_289
Yamada, Keita; Ishiwatari, Ryoshi (1999): Carbon isotopic compositions of long-chain n-alkanes in the Japan Sea sediments: implications for paleoenvironmental changes over the past 85 kyr. Organic Geochemistry, 30(5), 367-377, https://doi.org/10.1016/S0146-6380(99)00012-1
Coverage:
Median Latitude: 37.058150 * Median Longitude: 134.710000 * South-bound Latitude: 37.058000 * West-bound Longitude: 134.710000 * North-bound Latitude: 37.058300 * East-bound Longitude: 134.710000
Minimum DEPTH, sediment/rock: 0.025 m * Maximum DEPTH, sediment/rock: 2.890 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Ishiwatari, Ryoshi | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Ishiwatari, Ryoshi | Geocode | |
| 3 | AGE | Age | ka BP | Ishiwatari, Ryoshi | Geocode | |
| 4 | Carbon, organic, total | TOC | % | Ishiwatari, Ryoshi | Data for KH-79-3_L3 are quoted from Yamada and Ishiwatari (1998). | |
| 5 | Carbon/Nitrogen ratio | C/N | Ishiwatari, Ryoshi | |||
| 6 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Ishiwatari, Ryoshi | ||
| 7 | Comment | Comment | Ishiwatari, Ryoshi |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
172 data points