The Dansgaard-Oeschger cycles discovered in the up stream source region of the North Pacific Intermediate Water formation

Ayumu Ono, Kozo Takahashi, Kota Katsuki, Yusuke Okazaki, Tatsuhiko Sakamoto

研究成果: Contribution to journalArticle査読

19 被引用数 (Scopus)

抄録

Millennial-scale oceanographic oscillations were identified in the southern Okhotsk Sea based on high-resolution measurements of total organic carbon (TOC), C/N ratios, and biogenic opal, employing Core MD01-2412 (53 m) with the bottom age of 115 ka. The oscillations are linked with the Dansgaard-Oeschger (D-O) climatic cycles. Inadequate data existed in the source regions of the North Pacific Intermediate Water (NPIW) formation thus far. We report the first decisive documentation of the D-O cycles in the up stream source region of the NPIW, illustrating that the D-O cycles observed in the down stream regions (e.g., Santa Barbara Basin) due to expansion of the NPIW were in part governed by the climatic variations occurred in the Okhotsk Sea. Increases in TOC and C/N ratios reflect abrupt sea level rises associated with 14 interstadial events over the past 115 kyrs, attributing to the downward transport of eroded continental shelf sediments.

本文言語英語
ページ(範囲)1-4
ページ数4
ジャーナルGeophysical Research Letters
32
11
DOI
出版ステータス出版済み - 6 16 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 地球惑星科学(全般)

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