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| Wang, Wei-lung; Wang, Liang-chi. |
| This study provides insight into changes in sea ice conditions and the oceanographic environment over the past 500 kyr through analysis of the diatom record. Based on the relative abundance of 13 diatoms species in piston core MD012414, four types of environmental conditions in the central Okhotsk Sea over the last 330 ka BP have been distinguished: (1) open-ocean alternating with seasonal sea-ice cover in Stages 9, 5, and 1; (2) almost open-ocean free of sea-ice cover in Stages 7 and 3; (3) perennial sea-ice cover in Stages 6, 4, and 2; and (4) a warm ice-age dominated by open ocean assemblages in Stage 8. The littoral diatom species, Paralia sulcata, showed a sudden increase from the glacial period to the interglacial period over the last 330 ka BP,... |
| Tipo: Text |
Palavras-chave: Diatom indicator; Okhotsk Sea; Sea-ice; Paleoenvironment. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00237/34819/33683.pdf |
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| Wang, Kun-shan; Shi, Xue-fa; Zou, Jian-jun; Kandasamy, Selvaraj; Gong, Xun; Wu, Yong-hua; Yan, Quan-shu. |
| In this study, we investigate light and heavy minerals in sediment core OS03-1 located at the Academy of Sciences Rise of the southern Okhotsk Sea to determine their distributions and sources over the last 180 ka (thousand years). The sediment mainly consists of terrigenous and volcanic detritus. Ubiquitous drop-stones and volcanic detritus throughout the core and high detrital input suggest that sea ice, driven by wind and Kamchatka Current, was the main transport agent of detrital materials to the southern Okhotsk Sea. The ternary diagram of heavy minerals (hornblende-hypersthene-epidote) shows an expansion of detritus provenance from the eastern in cold periods to the northeastern in warm intervals of the Okhotsk Sea. It mainly relates to the shift of... |
| Tipo: Text |
Palavras-chave: Light and heavy minerals; Volcanic detrital; Sediment provenance; Sea ice; Okhotsk Sea. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00420/53145/55348.pdf |
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