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Northwest Pacific MD01-2421 Glacial/Interglacial d18O Data and SST Reconstruction
Entry ID: NOAA_NCDC_PALEO_2006-085

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Summary
Abstract: Oxygen and carbon isotopes of both benthic and planktonic foraminifera
were measured in an IMAGES giant piston core (MD01-2421, 36°01.4'N, 141°46.8'E,
\2224m. water depth, length 45.82m) collected from the area off the east coast
of central Japan, in the northwest Pacific. Paleo-SST at the core site for the
last 144,000 years was calculated from oxygen isotope differences between
benthic and planktonic foraminifera, based on an assumption of latitudinal
movements of the oceanic condition similar to the present day.

Samples for oxygen and carbon isotope measurements of foraminiferal tests were
collected at about 15 cm intervals. Each sample was taken using a plastic cube
of 2.2 cm3. The sample was dried with a freeze drier and washed using a 63 um
sieve after ultrasonic cleaning. About 40 individuals for planktonic and 20
specimens for benthic foraminifera were selected with a test size range
between 150 and 250 um for Globigerina bulloides and Bulimina aculeata, and
those between 250 and 355 um for Globorotalia inflata and Uvigerina spp. The
procedure for the isotope measurement is identical to that described by Oba
and Murayama (2004).

Abstract;
Very large sea surface temperature (SST) fluctuations are expected in the
northwest Pacific Ocean between glacial and interglacial periods due to
possible latitudinal migrations of the steep SST front between the Oyashio and
Kuroshio Currents. To reconstruct the SST changes for the past 144,000 years,
we conducted high-resolution oxygen and carbon isotope analysis of both
benthic and planktonic foraminifera from an IMAGES core off central Japan.
Using a newly developed method [Oba, T., Murayama, M., 2004. Sea surface
temperature and salinity changes in the northwest Pacific since the last
glacial maximum. J. Quat. Sci. 19(4), 335-346] for the reconstruction of the
SST, we have found very large (~20°C) SST fluctuations, with minimum SSTs of
3-4°C during Marine Isotope Stage (MIS) 2 and the MIS 6/5e transition, and
with peak SSTs of 22-23°C during early MIS 1 and the MIS 5a/4, 5c/5b and 5e/5d
transitions. The SSTs varied in parallel with changing carbon isotope
differences between Globorotalia inflata and Globigerina bulloides, which
suggests that the SST changes were primarily caused by the latitudinal
displacements of the Kuroshio-Oyashio Currents. We have also found that
northward shifts of the Kuroshio Current lagged up to several thousand years
at these transitions. Strong correlation between the SST shifts and orbital
forcing indicates that the latitudinal displacement of the Kurosho-Oyashio
Currents were influenced by summer insolation at 65N associated with
ENSO-like climatic variability in the tropical Pacific.

Related URL
Link: GET DATA
Link: GET DATA
Description: Access to data and documentation


Geographic Coverage
 N: 36.02 S: 36.02  E: 141.78  W: 141.78
 Max Depth: 2224 M

Data Set Citation
Dataset Originator/Creator: Oba, T., T. Irino, M. Yamamoto, M. Murayama, A. Takamura, and K. Aoki
Dataset Title: Northwest Pacific MD01-2421 Glacial/Interglacial d18O Data and SST Reconstruction
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER:2006-085
Dataset Release Date: 9/2006
Dataset Release Place: Boulder CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2006-085
Other Citation Details: NOAA/NCDC Paleoclimatology Program
Online Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/oba...


Paleo_Temporal_Coverage
Paleo Start Date: 155 ka
Paleo Stop Date: 0 ka
Chrono Unit:


Location Keywords
OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN
OCEAN > PACIFIC OCEAN > Northwest Pacific Ocean


Science Keywords
OCEANS >OCEAN CHEMISTRY >STABLE ISOTOPES    [Definition]
OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MICROFOSSILS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >OXYGEN ISOTOPES    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >SEA SURFACE TEMPERATURE RECONSTRUCTION    [Definition]
BIOLOGICAL CLASSIFICATION >PROTISTS >AMOEBOIDS >FORAMINIFERS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Project
PAGES >Past Global Changes, IGBP    [Information]


Keywords
Sea Surface Temperature reconstruction
Carbon isotopes
Stable Isotopes
Oxygen Isotopes
SST reconstruction


Data Set Progress
COMPLETE


Originating Center
NOAA/NCDC


Data Center
World Data Center for Paleoclimatology, Boulder    [Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/

Data Center Personnel
Name: WDC/PALEOCLIMATOLOGY, BOULDER
Phone: +1 (303) 497-6160
Fax: +1 (303) 497-6513
Email: paleo at noaa.gov
Contact Address:
World Data Center for Paleoclimatology
NOAA/NCDC Code E/GCx3
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA



Distribution
Distribution_Media: ftp
Distribution_Format: text, excel
Fees: none


Personnel
TADAMICHI OBA
Role: INVESTIGATOR
Contact Address:
Graduate School of Environmental Earth Science
Hokkaido University
Country: Japan


TOMOHISA IRINO
Role: INVESTIGATOR


M. YAMAMOTO
Role: INVESTIGATOR


M. MURAYAMA
Role: INVESTIGATOR


A. TAKAMURA
Role: INVESTIGATOR


K. AOKI
Role: INVESTIGATOR


Publications/References
Oba, T., T. Irino, M. Yamamoto, M. Murayama, A. Takamura, and K. Aoki. 2006.
Paleoceanographic change off central Japan since the last 144,000 years based
on high-resolution oxygen and carbon isotope records. Global and Planetary
Change, Vol. 53, pp. 5-20.

Creation and Review Dates
DIF Creation Date: 2006-12-18
Last DIF Revision Date: 2016-01-27



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