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

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalGeophysical Research Letters
Volume32
Issue number11
DOIs
Publication statusPublished - Jun 16 2005
Externally publishedYes

Fingerprint

Dansgaard-Oeschger cycle
intermediate water
upstream
cycles
total organic carbon
oscillation
water
oscillations
documentation
shelf sediment
carbon
interstadial
opal
continental shelves
sea level
continental shelf
sediments
expansion
high resolution
basin

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

The Dansgaard-Oeschger cycles discovered in the up stream source region of the North Pacific Intermediate Water formation. / Ono, Ayumu; Takahashi, Kozo; Katsuki, Kota; Okazaki, Yusuke; Sakamoto, Tatsuhiko.

In: Geophysical Research Letters, Vol. 32, No. 11, 16.06.2005, p. 1-4.

Research output: Contribution to journalArticle

@article{95c5be6ff86a421d80b0591889820d01,
title = "The Dansgaard-Oeschger cycles discovered in the up stream source region of the North Pacific Intermediate Water formation",
abstract = "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.",
author = "Ayumu Ono and Kozo Takahashi and Kota Katsuki and Yusuke Okazaki and Tatsuhiko Sakamoto",
year = "2005",
month = "6",
day = "16",
doi = "10.1029/2004GL022260",
language = "English",
volume = "32",
pages = "1--4",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "11",

}

TY - JOUR

T1 - The Dansgaard-Oeschger cycles discovered in the up stream source region of the North Pacific Intermediate Water formation

AU - Ono, Ayumu

AU - Takahashi, Kozo

AU - Katsuki, Kota

AU - Okazaki, Yusuke

AU - Sakamoto, Tatsuhiko

PY - 2005/6/16

Y1 - 2005/6/16

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=23844551779&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23844551779&partnerID=8YFLogxK

U2 - 10.1029/2004GL022260

DO - 10.1029/2004GL022260

M3 - Article

AN - SCOPUS:23844551779

VL - 32

SP - 1

EP - 4

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 11

ER -